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#2462675 - 03/07/18 02:09 PM New Truck - rust prevention
DusterKid Offline
super stock

Registered: 01/02/05
Posts: 795
Loc: Keymar, MD
If you were to buy a new truck since they pretty much have done away with undercoating and paint on the bottom side for that matter. How would you go about trying to help prevent rust on a driver and what products would you use?

Reason for asking:
Have an 07 Dodge that I tow with and mainly use as a daily driver in poor weather conditions. After 10 years rust is bubbling on truck bed and the underside there isn't anything that's not all rusted. Looking at buying a new truck, but my old one rust completely apart. But if I do so, I'd like to do something when I get it to help prevent rust for as long as I can and it may be the last truck I end up buying...

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#2462680 - 03/07/18 02:23 PM Re: New Truck - rust prevention [Re: DusterKid]
moparjim79 Offline


Registered: 09/30/14
Posts: 406
Loc: Central Pa
Do a google search on Krown rust prevention. There may be some distributors/contractors in your area

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#2462681 - 03/07/18 02:27 PM Re: New Truck - rust prevention [Re: DusterKid]
72N96RR Offline
I LOVE WEDGIES

Registered: 07/20/05
Posts: 11623
Loc: SHELBY TWP,,MICHIGAN
Line X also does a underside spray to prevent rust
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#2462682 - 03/07/18 02:28 PM Re: New Truck - rust prevention [Re: moparjim79]
wingman Offline
Uncreative Title

Registered: 06/23/04
Posts: 2245
Loc: St. Charles, MO
Originally Posted By moparjim79
Do a google search on Krown rust prevention. There may be some distributors/contractors in your area


X2

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#2462688 - 03/07/18 02:38 PM Re: New Truck - rust prevention [Re: DusterKid]
Orange_Crush Offline
Belieber!

Registered: 02/03/03
Posts: 17934
Loc: Charlotte, NC
OK, this one may be a little controversial, but I heard this from someone who lived in northern climates and he swore by it...I, personally, try to say as far away from snow as I realistically can so I have no idea if this does or does not work.

According to this guy, At the beginning of winter, and then monthly until the last of the snow, he would cover his entire undercarriage in WD-40. The inner fenders, insides of the quarter panels frame and all of the holes in the frame, etc. He said it would shed water like crazy and he never had issues with rust.

Again...I have no idea if that works...just passing it along. Of course, it probably couldn't hurt...especially in conjunction with standard rustproofing or undercoating.
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#2462696 - 03/07/18 02:52 PM Re: New Truck - rust prevention [Re: Orange_Crush]
moparjim79 Offline


Registered: 09/30/14
Posts: 406
Loc: Central Pa
Originally Posted By Orange_Crush
OK, this one may be a little controversial, but I heard this from someone who lived in northern climates and he swore by it...I, personally, try to say as far away from snow as I realistically can so I have no idea if this does or does not work.

According to this guy, At the beginning of winter, and then monthly until the last of the snow, he would cover his entire undercarriage in WD-40. The inner fenders, insides of the quarter panels frame and all of the holes in the frame, etc. He said it would shed water like crazy and he never had issues with rust.

Again...I have no idea if that works...just passing it along. Of course, it probably couldn't hurt...especially in conjunction with standard rustproofing or undercoating.

Some of the farmers in this area have been known to spray down their equipment with trans fluid several times a year, same results as you mention.

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#2462701 - 03/07/18 03:17 PM Re: New Truck - rust prevention [Re: DusterKid]
DaytonaTurbo Offline


Registered: 02/26/03
Posts: 20801
Loc: Manitoba, Canada
I would have it undercoated before it sees the first mile on the odometer. Maybe think about a ford with the aluminum body?

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#2462717 - 03/07/18 03:46 PM Re: New Truck - rust prevention [Re: DaytonaTurbo]
moparx Offline
Dreaming of implants

Registered: 09/03/03
Posts: 8719
Loc: north of coder
a local garage has a formula he stirs up and sprays. my 99 caravan gets it every year. i take out the taillights and all the body plugs that were factory installed. i drilled extra 1/2" holes in the dog legs, rockers, doors, and the hatch. he sprays it in till it runs out. gets the hood lip openings too. works great ! i never did this to my other minivans, and the bodies only lasted 315k+ on my 95, and 200k+ on my 2000 till the bodies fell off. if i keep doing this, my bus should last till i croak.
beer

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#2462738 - 03/07/18 04:33 PM Re: New Truck - rust prevention [Re: moparx]
GOLDMYN Offline
top fuel

Registered: 08/01/04
Posts: 1925
Loc: Kenosha, Wi
I bought a new Ram Big Horn last year and prior to the first snow, I parked it in the garage, called the insurance company and put storage coverage on it, I went on ebay and bought a low mileage 97 Buick and thats been our go to car this winter. I'll take the truck out 1st of April and enjoy my rust free 7K mile Ram. Beating the salt in Wisconsin
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#2462754 - 03/07/18 05:03 PM Re: New Truck - rust prevention [Re: moparjim79]
Sunroofcuda Offline
master

Registered: 01/20/03
Posts: 6342
Loc: Highland, MI.
Originally Posted By moparjim79
Do a google search on Krown rust prevention. There may be some distributors/contractors in your area


I was really up on Krown, until last year. I had just brought a low mileage 300M back from Florida 4 years ago - not a speck of rust anywhere even though it was from Naples - not too far from the ocean. But the car was a 43,000 CLEAN car without a speck of rust. Before winter hit, the wife & I took 2 vehicles to the Sarnia Krown - they did a great job of applying the clear Krown rustproofing. I was thinking the stuff would set-up & form a film on the surfaces. It doesn't - it rinses off. It's like spraying vegetable oil all over. They even gave me a few cans of the stuff for touch-up. When I got home, I sprayed all the inner crevices & corners of both the hood & trunk lid. Now, the front edge of the hood is rusting, & the underside of the vehicle has NO coating on it at all anywhere, & edges of the sheetmetal are starting to rust. The Krown just has no substance to it. I am unimpressed. There are no "rust inhibitors" to the Krown that I can tell.
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#2462938 - 03/07/18 10:36 PM Re: New Truck - rust prevention [Re: Orange_Crush]
WO23Coronet Offline
master

Registered: 01/08/08
Posts: 4027
Loc: Canada
Originally Posted By Orange_Crush
OK, this one may be a little controversial, but I heard this from someone who lived in northern climates and he swore by it...I, personally, try to say as far away from snow as I realistically can so I have no idea if this does or does not work.

According to this guy, At the beginning of winter, and then monthly until the last of the snow, he would cover his entire undercarriage in WD-40. The inner fenders, insides of the quarter panels frame and all of the holes in the frame, etc. He said it would shed water like crazy and he never had issues with rust.

Again...I have no idea if that works...just passing it along. Of course, it probably couldn't hurt...especially in conjunction with standard rustproofing or undercoating.



Anything oil based will save it: fluid film, WD40, penetrating oil, diesel fuel, transmission oil, whatever.

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#2462954 - 03/07/18 11:21 PM Re: New Truck - rust prevention [Re: DusterKid]
BloFish Offline


Registered: 11/20/04
Posts: 13790
Loc: Lake Oroville
I would move laugh2
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#2462961 - 03/07/18 11:57 PM Re: New Truck - rust prevention [Re: DusterKid]
BH27G1B Offline
member

Registered: 01/11/07
Posts: 80
Loc: MA
Hydraulic Oil works excellent, and does not affect rubber parts.

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#2462963 - 03/08/18 12:04 AM Re: New Truck - rust prevention [Re: DusterKid]
bee1971 Offline
top fuel

Registered: 02/23/03
Posts: 1885
Loc: Sobieski Wi
LPS3

Fluid Film

Removing all the plastic wheel well liners is a must , before spraying

My 2011 Ram in WI , is spotless

Underbody chassis car washes in winter helps also
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2011 Ram Sport 1500 Quad Cab Deep Water Blue Loaded
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#2462995 - 03/08/18 06:20 AM Re: New Truck - rust prevention [Re: DusterKid]
MI_Custumz Offline
master

Registered: 12/06/03
Posts: 5029
Loc: Port Huron, Michigan
Thought I read somewhere that if it's not "Mopar approved" it could void any warranties. I'm assuming it would be if a part is saturated and doesn't function like it should? I don't use it and have a 2008 Avenger that has a little rust showing at the bottom of the door edges. I try to take the cars through the car wash that does the underside as often as the weather allows in the winter and then wipe the door edges clean after I'm done. Some guy from work got the bed liner (something similar) as an undercoating and when he needed some repairs done, they spent hours chipping away stuff because they just sprayed it without anything being left exposed.

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#2463000 - 03/08/18 07:35 AM Re: New Truck - rust prevention [Re: DusterKid]
jerseybud Offline
mopar

Registered: 04/25/04
Posts: 643
Loc: Maine
If it was my truck:

1st- I'd coat anything that was a crease or blind with 2 coats of eastwood internal frame coating and let it dry. Whhelwells, rockers, insides of frame, doglegs of fenders, bottom creases of doors, etc

2nd- would use this: http://www.lpslabs.com/product-details/612
on top of the eastwood. Flows well when wet but drys to a very firm paraffin like coating that has to be scraped off- will not wash off. 3M and eastwood makes a similar product in bulk called Heavy Duty anti rust.

That should do the trick. Its just a lot of work getting it in the nooks and crannies and getting enough gumption to drill holes in a new vehicle.

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#2463010 - 03/08/18 08:21 AM Re: New Truck - rust prevention [Re: DusterKid]
MI_Custumz Offline
master

Registered: 12/06/03
Posts: 5029
Loc: Port Huron, Michigan
If it's brand new, I think Chrysler offers a limited lifetime warranty on their undercoating. I've also heard good things about Krown. I may start Krown this fall on our 2014 Durango. I have never done undercoating on a car, but never had a nice car to keep as long as I plan on the Durango.

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#2463030 - 03/08/18 09:11 AM Re: New Truck - rust prevention [Re: DusterKid]
Yellow Fever Offline
super stock

Registered: 08/22/11
Posts: 1082
Loc: SE PA
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#2463056 - 03/08/18 10:07 AM Re: New Truck - rust prevention [Re: GOLDMYN]
DaytonaTurbo Offline


Registered: 02/26/03
Posts: 20801
Loc: Manitoba, Canada
I bought my civic new in 2007. All I did was have it undercoated. No rust yet. I live in a rural area and drive gravel roads and it's doing great. My wife's mazda 3, same year, no factory undercoating has the usual mazda rust underneath and starting in the rear wheel wells.

Originally Posted By GOLDMYN
I bought a new Ram Big Horn last year and prior to the first snow, I parked it in the garage, called the insurance company and put storage coverage on it, I went on ebay and bought a low mileage 97 Buick and thats been our go to car this winter. I'll take the truck out 1st of April and enjoy my rust free 7K mile Ram. Beating the salt in Wisconsin


So you're saying you dumped 50k on a TRUCK to instead drive a 97 buick in the winter? realcrazy

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#2463083 - 03/08/18 10:52 AM Re: New Truck - rust prevention [Re: DusterKid]
63CandyMatic Offline
pro stock

Registered: 01/20/03
Posts: 1404
Loc: Land of the Brave, Home of the...
WD-40 does not work.

Mixture of oil and tranny fluid is much better, others mentioned work well also.

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#2463125 - 03/08/18 12:23 PM Re: New Truck - rust prevention [Re: DusterKid]
HotRodDave Offline
master

Registered: 01/29/05
Posts: 9720
Loc: Kalispell Mt.
I wouldn't use engine oil or trans fluid as they both have detergents that allow the oil and water to mix(imagine the milkshake in your oil when a headgasket blows coolant in it), this will eventually let the salt water reach the metal. Hydraulic oil would be much better as that will not mix with water or wash off near as easy. You could also use non-detergent lawn mower oil or even gear oil if you like to stink. Whatever you do you should do it with the car hot and dry in the summer so you don't trap any moisture in where your trying to keep it out.

The best plan long term would be to convince you local authorities not to take bribes from the auto industry who actually wants your car to rust out and convince them to plow and spread sand instead of a salt ing your car. I HATE when they salt the roads around here, luckily they usually only spray a little at intersections.

Another thing I try is to run real good snow tires so I can simply look for the driest groove to drive on.

Doing all the little things right should help postpone the rust, still gonna happen but might slow it a little if your proactive.
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#2463148 - 03/08/18 01:12 PM Re: New Truck - rust prevention [Re: 63CandyMatic]
GOLDMYN Offline
top fuel

Registered: 08/01/04
Posts: 1925
Loc: Kenosha, Wi

Originally Posted By 63CandyMatic
WD-40 does not work.

Mixture of oil and tranny fluid is much better, others mentioned work well also.



Yes, That what I did and I don't appreciate your personal remark!
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Semper Fi

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#2463464 - 03/08/18 09:33 PM Re: New Truck - rust prevention [Re: DaytonaTurbo]
GOLDMYN Offline
top fuel

Registered: 08/01/04
Posts: 1925
Loc: Kenosha, Wi
Originally Posted By DaytonaTurbo
I bought my civic new in 2007. All I did was have it undercoated. No rust yet. I live in a rural area and drive gravel roads and it's doing great. My wife's mazda 3, same year, no factory undercoating has the usual mazda rust underneath and starting in the rear wheel wells.

Originally Posted By GOLDMYN
I bought a new Ram Big Horn last year and prior to the first snow, I parked it in the garage, called the insurance company and put storage coverage on it, I went on ebay and bought a low mileage 97 Buick and thats been our go to car this winter. I'll take the truck out 1st of April and enjoy my rust free 7K mile Ram. Beating the salt in Wisconsin


So you're saying you dumped 50k on a TRUCK to instead drive a 97 buick in the winter? realcrazy


My post s/b for the guy on the thread above
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Semper Fi

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#2463813 - 03/09/18 12:57 PM Re: New Truck - rust prevention [Re: DusterKid]
njmopar Offline
super stock

Registered: 04/28/03
Posts: 968
Loc: Clinton, NJ
I vote Fluid Film. Has saved my 300M. It may smell nasty (you get used to it) and attract some dirt, but does the job intended. Does not cause any consequential damage and no harm to environment.
Buy it in gallon can and get a cheap shutz gun. 1/2-3/4 gallon will do a full car.
Do yourself a favor and put down some cheap plastic on your driveway and put the truck up on jackstands with wheels off. Cover brake discs with plastic bags and your cat with tinfoil. Saves getting brake surface from getting coated and the eventual smoke trail when you go out on your first drive.
Park in the street for a few hours after to let excess drip off from any surface heated from the exhaust and not stain your drive.

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#2463849 - 03/09/18 02:02 PM Re: New Truck - rust prevention [Re: DusterKid]
Sunroofcuda Offline
master

Registered: 01/20/03
Posts: 6342
Loc: Highland, MI.
OK, now where do you get a good quality undercoating gun kit with wands & tips from?? I am not too impressed with the Eastwood setup I got a few years ago.
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#2464107 - 03/09/18 09:23 PM Re: New Truck - rust prevention [Re: GOLDMYN]
63CandyMatic Offline
pro stock

Registered: 01/20/03
Posts: 1404
Loc: Land of the Brave, Home of the...
Originally Posted By GOLDMYN

Originally Posted By 63CandyMatic
WD-40 does not work.

Mixture of oil and tranny fluid is much better, others mentioned work well also.



Yes, That what I did and I don't appreciate your personal remark!


Not sure I understand your comment. I've used WD-40, and found it to be a a lousy rust preventative. I use Fluid Film also for about 10 years. We used to use old trans fluid strained and sprayed through a pump sprayer, but it drips and drips.

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#2464198 - 03/10/18 07:07 AM Re: New Truck - rust prevention [Re: DusterKid]
NewbombTurkk Online   content
master

Registered: 01/31/03
Posts: 3783
Loc: West Virginia
Why spend huge bucks on a new vehicle in the rust belt? In WV they rust before the payment book is thin.
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#2464204 - 03/10/18 07:22 AM Re: New Truck - rust prevention [Re: DusterKid]
ChryCoGuy Offline
master

Registered: 10/04/05
Posts: 5428
Loc: Canada
I have a 1997 Sebring that we've owned since 1999. Applied Krown on it when we bought it and almost every year since. Also bought some spray cans of Rust Check (more easily available locally than Krown, but similar product) to touch up any areas missed by the Krown guys.

The car has been driven every winter in one of the harshest corrosion areas in NA since we've owned it and has zero rust to this day.

I would recommend it, and want to note that the touch ups with a spray can are important because the guys doing the application never cover all the critical areas on the car, the most important of which can be some of the crevices in between panels that generally don't get good Ecoat coverage, and stamped edges of panels which often have burrs and paint does not cover them well. The main flat areas on underfloor panels are usually not the starting point of rust unless there is some damage from stone impact, etc.

IMHO, WD40 is too light and will not provide adequate coverage.

twocents

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#2464212 - 03/10/18 08:06 AM Re: New Truck - rust prevention [Re: DusterKid]
redraptor Offline
master

Registered: 11/11/08
Posts: 4845
Loc: Greenville, PA
ANY oil sprayed on religiously will work for rust prevention even WD-40 if you can get enuff on it. WHEN to spray seems to be a debate but I prefer fall as you have all summer for the rains to wash off salt/brine. Once the brine gets in the metal you can only slow it down, not stop it.
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#2464229 - 03/10/18 09:02 AM Re: New Truck - rust prevention [Re: redraptor]
moparx Offline
Dreaming of implants

Registered: 09/03/03
Posts: 8719
Loc: north of coder
i get my spray deal done around thanksgiving time, before the first snow. a few days after it gets sprayed, it is done dripping and ready for the salt spray.
beer

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#2464954 - 03/11/18 08:01 PM Re: New Truck - rust prevention [Re: moparx]
Kelob_pie Offline
enthusiast

Registered: 02/04/03
Posts: 341
Loc: Kewaskum, WI
Fluid Film twice a year around here, no complaints, load it on everywhere! Go nuts with it.

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#2465133 - 03/12/18 09:13 AM Re: New Truck - rust prevention [Re: Kelob_pie]
qkRick Offline
super stock

Registered: 12/06/03
Posts: 956
Totally agree that any oil is better than nothing. Also my thought is thay if you only did a car once it should be when it is new. Since we have started using brine here I try to do vehicles twice. First as early in spring and then as late in the fall as possible. When I do it myself I normally use hydraulic oil for hard to access areas and chain saw bar oil for other areas. I purchased the big kit from Fluid Film last fall but fortunately did not have to use the vehicle I used it on this winter I beg my friends to do their vehicles but many are worried about the mess. This process has prolonged the life of my vehicles and saved me thousands in repairs. Quick pic of underside of my 97 Ram. My other winter tactic is that is to never park a salty car in warm garage. Salt is less hateful at lower temps. Makes wife crazy but it is easier to warm up and scrape car than to fix rust.


Attachments
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#2465139 - 03/12/18 09:37 AM Re: New Truck - rust prevention [Re: qkRick]
DaytonaTurbo Offline


Registered: 02/26/03
Posts: 20801
Loc: Manitoba, Canada
Originally Posted By qkRick
My other winter tactic is that is to never park a salty car in warm garage. Salt is less hateful at lower temps. Makes wife crazy but it is easier to warm up and scrape car than to fix rust.


I think that freeze-thaw cycle causes problems and the salt only exacerbates it. Certain times of the year it can't be avoided but I've never noticed anything rust in the dead of winter when the temps stay below freezing.

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#2465665 - 03/13/18 08:21 AM Re: New Truck - rust prevention [Re: DusterKid]
360view Offline
master

Registered: 01/18/06
Posts: 4373
Loc: USA
Almost all the auto manufacturers now use at least some galvanized steel panels in their autos that have a special surface finish combined with special primer that sticks to the zinc surface and exterior paint.

If zinc is good in this auto application,
why wouldn’t replaceable “Boat Zincs” with mounts in the right spots
work even better?

The mounting nuts and bolts for the Boat Zincs would have to be cleaned periodically since the corrosion is being “concentrated” at that spot.

It would be hard for an owner to know where to best mount the Boat Zincs,
but since auto manufacturers do corrosion testing routinely anyway,
adding a couple extra vehicles to their tests with trial zinc mounts spread around would not be that big a deal or expense.

Since it has now been proven that one of the best ways to reduce CO2 emissions is to keep already made vehicles much longer,
maybe I should place my tongue firmly in my cheek,
and plead with Al Gore and Bill-Nye-The-Science-Guy to demand Boat Zincs and denounce ethanol addition to gasoline?

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#2465669 - 03/13/18 08:29 AM Re: New Truck - rust prevention [Re: 360view]
moparx Offline
Dreaming of implants

Registered: 09/03/03
Posts: 8719
Loc: north of coder
something i never quite figured out about auto makers is their constant claims about "XYZ" rust preventative processes, as they surely know about the road treatments that cause rust in the first place. they always say "something" about their "salt spray" tests. unless they only add one box of table salt to eleventybillion gallons of water for their tests.
beer

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#2465682 - 03/13/18 09:40 AM Re: New Truck - rust prevention [Re: moparx]
DaytonaTurbo Offline


Registered: 02/26/03
Posts: 20801
Loc: Manitoba, Canada
Originally Posted By moparx
something i never quite figured out about auto makers is their constant claims about "XYZ" rust preventative processes, as they surely know about the road treatments that cause rust in the first place. they always say "something" about their "salt spray" tests. unless they only add one box of table salt to eleventybillion gallons of water for their tests.
beer


I always wondered about that too. Sure I can spray saltwater at a painted surface and it'll last but try mixing in some gravel, stones and a constant freeze-thaw cycle and let us know how that changes things.

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#2466696 - 03/14/18 10:05 PM Re: New Truck - rust prevention [Re: DusterKid]
gts340swinger Offline


Registered: 08/28/06
Posts: 6440
Loc: Kingston, IL USA!
I use the PB Blaster Marine "Corrosion Stop". Comes in a spray can and cost $5 a can. I sprayed it all over everything on the bottom side and under the hood when my trucks were new. They don't see the inside of a garage, ever. This stuff sticks, it will collect a little grime over time but will wash right off with a pressure washer. everywhere I sprayed this stuff looks brand new underneath.
This is a cheap and easy way to prevent rust. I re apply every fall but the first application took 3-4 cans to really coat everything.
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#2466797 - 03/15/18 07:29 AM Re: New Truck - rust prevention [Re: gts340swinger]
360view Offline
master

Registered: 01/18/06
Posts: 4373
Loc: USA
Originally Posted By gts340swinger
I use the PB Blaster Marine "Corrosion Stop". Comes in a spray can and cost $5 a can.


This one?

https://www.amazon.com/Blaster-16-CSP-Heavy-Duty-Corrosion-Stop/dp/B0015DOEKI/ref=sr_1_fkmr3_1?s=automotive&ie=UTF8&qid=1521113011&sr=1-1-fkmr3&keywords=PB+Blaster+Marine+%22Corrosion+Stop%22

Or these others

https://www.amazon.com/BLaster-Aerosol-Corrosion-Stop-Protectant/dp/B00TPAD8QE/ref=sr_1_fkmr3_2?s=automotive&ie=UTF8&qid=1521113011&sr=1-2-fkmr3&keywords=PB+Blaster+Marine+%22Corrosion+Stop%22


https://www.amazon.com/s/ref=nb_sb_noss/143-1999007-8094647?url=search-alias%3Daps&field-keywords=PB+Blaster+Marine+%22Corrosion+Stop%22

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#2466999 - 03/15/18 04:02 PM Re: New Truck - rust prevention [Re: 360view]
qkRick Offline
super stock

Registered: 12/06/03
Posts: 956
I was in a hurry when writing last post and forgot an important part of my rust prevention regimen. Not necessary on a new vehicle but I make certain that all debris is out of car body such as wheel wells, dog legs on fenders, behind mudflaps, behind plastic wheel well covers etc.

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#2467351 - 03/16/18 12:57 PM Re: New Truck - rust prevention [Re: redraptor]
ChryCoGuy Offline
master

Registered: 10/04/05
Posts: 5428
Loc: Canada
Originally Posted By redraptor
ANY oil sprayed on religiously will work for rust prevention even WD-40 if you can get enuff on it. WHEN to spray seems to be a debate but I prefer fall as you have all summer for the rains to wash off salt/brine. Once the brine gets in the metal you can only slow it down, not stop it.


I think WD-40 is too light to have any kind of staying power. It's great for wicking in and loosening stuck parts, but I don't think it would last long on a surface being splashed on a regular basis.

When? I prefer early-mid autumn, before it gets too cold to allow the oil to flow better in warmer temperatures so that it will creep to the crevices between panels. You want to get it in there before salt season too.

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#2467404 - 03/16/18 02:55 PM Re: New Truck - rust prevention [Re: 360view]
ChryCoGuy Offline
master

Registered: 10/04/05
Posts: 5428
Loc: Canada
Originally Posted By 360view
Almost all the auto manufacturers now use at least some galvanized steel panels in their autos that have a special surface finish combined with special primer that sticks to the zinc surface and exterior paint.

If zinc is good in this auto application,
why wouldn’t replaceable “Boat Zincs” with mounts in the right spots
work even better?

The mounting nuts and bolts for the Boat Zincs would have to be cleaned periodically since the corrosion is being “concentrated” at that spot.

It would be hard for an owner to know where to best mount the Boat Zincs,
but since auto manufacturers do corrosion testing routinely anyway,
adding a couple extra vehicles to their tests with trial zinc mounts spread around would not be that big a deal or expense.

Since it has now been proven that one of the best ways to reduce CO2 emissions is to keep already made vehicles much longer,
maybe I should place my tongue firmly in my cheek,
and plead with Al Gore and Bill-Nye-The-Science-Guy to demand Boat Zincs and denounce ethanol addition to gasoline?


I'm sure every idea conceivable has been tested by the manufacturers at one point or the other.

The thing about mounting sacrificial zinc plates to a vehicle is that:
(1) They are heavy. Today's cars are heavy enough without adding extra zinc blocks and fastening systems to them.
(2) The effect would be very localized to the area directly around the block. Probably works better on boats because the hull is submerged in water, allowing for better current flow.
(3) There would be increased maintenance costs in having the blocks replaced on a regular basis - customers would not be happy about increased maintenance costs.
(4) They would not provide protection where it's really needed - at crevice areas and panel edges.

Galvanizing panels distributes the zinc evenly across the surface of the panel, therefore theoretically giving the same galvanic corrosion protection (the desired effect of the zinc blocks) to the entire surface. However, it is so thin that it is depleted relatively quickly - and thus only provides a short delay in the corrosion of the base metal.

Preventing corrosion is very easy in concept - simply cover all materials with a decent barrier (i.e. paint). If the base metal is never exposed to oxygen and water (with or without catalyst), then it will never corrode. The problem is that it's virtually impossible to guarantee perfect coverage in a production environment (by design and by variations in quality), and it's virtually impossible to guard those panel coatings from impact damage (i.e. stone chips, etc.).

The goal of the manufacturers is to provide a perfect impenetrable barrier to the metal to prevent corrosion from starting. However since this is not really possible, zinc coating is added to delay the onset of corrosion in these imperfect situations where the coating is not good enough to provide a barrier for the base metal. twocents

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#2467408 - 03/16/18 03:03 PM Re: New Truck - rust prevention [Re: DaytonaTurbo]
ChryCoGuy Offline
master

Registered: 10/04/05
Posts: 5428
Loc: Canada
Originally Posted By DaytonaTurbo
Originally Posted By moparx
something i never quite figured out about auto makers is their constant claims about "XYZ" rust preventative processes, as they surely know about the road treatments that cause rust in the first place. they always say "something" about their "salt spray" tests. unless they only add one box of table salt to eleventybillion gallons of water for their tests.
beer


I always wondered about that too. Sure I can spray saltwater at a painted surface and it'll last but try mixing in some gravel, stones and a constant freeze-thaw cycle and let us know how that changes things.


There are many types of salt spray tests and many types of corrosion test modes depending on the manufacturer and what type of environment they are protecting against.

Their testing usually involves some method to inflict 'normal' damage and weather conditions in addition to salt spray testing in an attempt to simulate actual conditions that a vehicle is exposed to in the real world.

The engineers working at car companies are actually smart people who have already thought about these things and have put them in practice, but there are constraints that they have to work within - the most important being cost.

I've always said, you could build a perfect vehicle that never rusts and never breaks down, but it would cost $500,000 to build and nobody could afford to buy one... twocents

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#2467455 - 03/16/18 05:19 PM Re: New Truck - rust prevention [Re: DusterKid]
63CandyMatic Offline
pro stock

Registered: 01/20/03
Posts: 1404
Loc: Land of the Brave, Home of the...
I'm going to try the PB blaster mentioned above if I come across it.

I wouldn't use WD-40. We've tested it, and it's lousy in that role. Unless you like rust.

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#2467640 - 03/17/18 06:50 AM Re: New Truck - rust prevention [Re: DusterKid]
360view Offline
master

Registered: 01/18/06
Posts: 4373
Loc: USA
In the 1980s the engineer father of an engineer daughter I had gone to school with convinced me to try some 3Cr12 steel. It was much less expensive than typical 18-8 stainless steel and worked out great in the things we made from it. Later i read that they built railroad hopper cars out of it in Australia using much thinner gauge than mild steel.

http://askzn.co.za/stainless-steel/tech-grade-3cr12.htm

Sample quote

3CR12 is designed with ease of fabrication in mind and its composition and properties result in good forming, drawing, blanking and punching characteristics. The steel is easily welded by any of the recognised welding processes and should be post weld pickled/cleaned and passivated.
End quote

Pickup frames and cargo boxes would seem a natural for 3Cr12

A-La John Delorean these vehicles could be fitted with flux-capacitors....

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