Re: Black zinc go-to person???
[Re: 68jim]
#1380486
02/02/13 04:17 PM
02/02/13 04:17 PM
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Joined: Jan 2004
Posts: 27,347 Today? Who Knows?
1_WILD_RT
Management Trainee
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Management Trainee
Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
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You may be able to find a local plater that can do it, out in California it's gotten hard to find... Since they have a flat minimum fee last time I had black zinc done I took in quite a bit...
"The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."
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Re: Black zinc go-to person???
[Re: 1_WILD_RT]
#1380490
02/02/13 05:28 PM
02/02/13 05:28 PM
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Joined: Jan 2003
Posts: 18,632 jersey shore
flypaper
I hate Texas
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I hate Texas
Joined: Jan 2003
Posts: 18,632
jersey shore
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that stuff looks nice wild! have you used it on a car for a while and how does it hold up? i'm at that crossroad right now i have alot of that stuff cleaned up and bagged away and i'm plotting my next move.
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Re: Black zinc go-to person???
[Re: 68jim]
#1380495
02/03/13 10:41 AM
02/03/13 10:41 AM
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Joined: Sep 2011
Posts: 1,487 STL
cdstl
pro stock
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pro stock
Joined: Sep 2011
Posts: 1,487
STL
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I have used Gun blue which I purchased at Cabela's. The parts need to be "oiled" to prevent them from rusting. I coat them with grease. It's an inexpensive way of getting a finish on them. Picture shows before, wire wheeled and after although the after does not have grease on it yet.
1972 Cuda 340 4 speed, 2001 Ram CTD 4x4 6 speed, 1970 Duster 408 4 speed, 1996 Ram 5.9 2x4 auto, 1965 Coronet 500
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Re: Black zinc go-to person???
[Re: cdstl]
#1380497
02/03/13 12:57 PM
02/03/13 12:57 PM
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Joined: Oct 2011
Posts: 768 Dry Heat AZ
AAR#2
super stock
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super stock
Joined: Oct 2011
Posts: 768
Dry Heat AZ
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Quote:
I have used Gun blue which I purchased at Cabela's. The parts need to be "oiled" to prevent them from rusting. I coat them with grease. It's an inexpensive way of getting a finish on them. Picture shows before, wire wheeled and after although the after does not have grease on it yet.
Gun blue is Black Oxide, and a horrible corrosion preventative. Its strong suit is that it add's no appreciable dimension to a surface, so precision ground or finished items will work as intended. Due to the structure of the coating it holds oil (or sealers) and is the only real protection you get. The downside being that oil will collect dirt. In some applications black oxide is used in gearboxe gears to continually wet the surface (remember it holds oil), providing better lubrication.
Phosphates (zinc or manganese) are only slightly better for corrosion protection and act similarly to black oxide by holding oil (or sealer) on the surface. Colors vary slightly based on the age of bath, time in bath, temperature and material being plated. Zinc is a more porous surface and generally more grey, manganese is a tighter structure and usually a bit darker, perhaps more appealing visually.
The original post was asking about black zinc. This surface will actually provide good corrosion protection since your actually applying zinc with a conversion coat. If taken to a plating shop it will likely be hexavalent though some are switching to trivalent chromates as they are more EPA friendly. Black chromate will leave a very slight iridescent color on the surface (purple, pink, green effect).
Bottom line, oxide and phosphate are poor corrosion protectors on their own and rely on oils or sealers, black zinc is far superior for corrosion protection (in the magnitude of 15x better)
The decision becomes do you need original finish and look or not, builder choice.
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Re: Black zinc go-to person???
[Re: 1_WILD_RT]
#1380498
02/03/13 01:10 PM
02/03/13 01:10 PM
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Joined: Jan 2003
Posts: 18,632 jersey shore
flypaper
I hate Texas
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I hate Texas
Joined: Jan 2003
Posts: 18,632
jersey shore
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Quote:
Quote:
I have used Gun blue which I purchased at Cabela's. The parts need to be "oiled" to prevent them from rusting. I coat them with grease. It's an inexpensive way of getting a finish on them. Picture shows before, wire wheeled and after although the after does not have grease on it yet.
Been there, tried that... As pointed out in the first post the results of gun blue or other cold dip processes looks good short term but I drive my cars & bolts showing rust in a couple years isn't acceptable...
that is the way i'm thinking.. i live in one of the most harsh environments for a car to survive long term. it might seem overkill, but i see first hand how different things will last out in the elements at the shore near me.
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Re: Black zinc go-to person???
[Re: flypaper]
#1380499
02/04/13 04:06 PM
02/04/13 04:06 PM
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Joined: Nov 2003
Posts: 3,106 Ridgeland Wi
mopars_1
master
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master
Joined: Nov 2003
Posts: 3,106
Ridgeland Wi
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I used gun blueing and then coared them in ECS's rpm. Relativly cheap and effective way to do all my hardware.
1971 Plymouth Duster 340 auto 1937 Plymouth PT50 1969 Dodge Dart Swinger 340 4 speed 2013 Ram laramie 2500 hemi 2008 Harley FLSTSB springer
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