Evapo rust? Who uses it?

Is there any negative effects to galvanized steel?I have a ashtray and headlight baskets to do.Using evaporust on lots of hardware and smaller items with excellent results.

I'd say don't use it on galvanizing unless you want the galvanizing to either turn black or disappear.

Galvanizing deposits a zinc layer on the steel. The zinc corrodes first before the steel does, that's its job. It's called a sacrificial coating. A solution that is supposed to attack rust is probably acidic, so it will oxidize the zinc.

End result, no galvanizing or at least a very hard time getting it to look right.

That's my opinion.

R.

Works well but don`t expect it to last for a long period of time. It turns to crap rather quickly.

Correct on the galvanizing, it will remove the bond between the base metal and the coating. The reason is simple as explained above, since Evaporust removes corrosion, it removes the corrosion layer that bonds the two materials and they separate. I learned this the hard way, put a mint set of KH A body disc brake backing plates in to clean up some small rust specs and ended up watching all the nice zinc flakes slide off the clean shiny metal underneath when I rinsed them off .....DOH!

Whats the best way to dispose of old evaporust ?

The Evapo-Rust web site says it is "sewerable" but also says "only the chelated iron content of the solution will dictate disposal requirements". Maybe this means you should filter it before pouring the liquid in the sewer?

I suspect you can filter it by (1) fold a large paper towel twice (2)insert the paper in a funnel (3) pour (4) dispose of paper in trash. (This is also a good way to filter coolant that is to be re-used.)

Interesting that the web site never mentions not to use it on galvanized or zinc plated items. Their lame web site looks to have been written and designed by an ex-used car salesman, not someone knowledgeable about chemistry.

The cheapest price I have found is to order it on line from Northern Tool and pick it up from their store with $0 freight. But next time I'll be trying Safest Rust Remover.

But I will say that Evapo-Rust proved me to be a genius when I hesitated to invest in sandblasting equipment. Sure glad I dawdled.