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Need to create pitting corrosion on stainless steel

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Q. I've been involved in passivation of 300 series stainless steel for 35 years. For 33 of those, I've worked on removing rust from stainless steel damaged by pitting corrosion. I need to "create" some deeply rusty stainless steel for R&D.

Any suggestions? I've thought of damaging the metal with mild steel contact, welding HAZ and mild steel grinding sparks. Then put the sample coupon in a DIY salt cabinet. But for how long to get the pits established.

A metallurgist also mentioned an electrolytic method. I need to refresh my memory on his suggestion.

Todd Turner
Industrial Cleaning - Monroe, Louisiana
November 21, 2024

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