Thanks for correcting me. Yes, I mean "passivated" and inadvertently typed pacified.

Here is an extract: " According to ASTM A380, passivation is "the removal of exogenous iron or iron compounds from the surface of stainless steel by means of a chemical dissolution, most typically by a treatment with an acid solution that will remove the surface contamination, but will not significantly affect the stainless steel itself." In addition, it also describes passivation as "the chemical treatment of stainless steel with a mild oxidant, such as a nitric acid solution, for the purpose of enhancing the spontaneous formation of the protective passive film."

Also http://www.mmsonline.com/articles/100304.html

Over the years I have found out that most welding job done without proper cleaning, passivation and polishing started to show brown rust as early as the first year.


"Richard J Kinch" wrote in message . ..
All welds have to be pacified to minimized rusting.

I think you mean, "passivated".