47017

Chemical to remove burn marks from stainless steel? [Pennsylvania] 

November 10, 2007

I work for a tanker company my name is Bill, and want to know what I can use to remove the burn marks from welding I need to find a chemical to use it must look like it was not touched .
My boss is having me use a flapper wheel but I know that there is something that I can wipe it off with please if you can help thanks

William Knoche
welder - Lemoyne, PA, USA

William:

Typical weld paste for pickling of welds will remove the heat effected discoloration (heat tint) that you see. It is generally a blend of nitric and hydrofluoric acid in a gelled solution. After removal of the heat tint, passivation should be performed with eithor nitric or citric acid gel passivation. These solutions can be purchased from a number of suppliers or contact me for assistance.

Thanks,

Daryl L. Roll Astro Pak Corporation Costa Mesa, CA, USA