Stainless steel will form new protective chromium oxide layer instantly when the existing provective layer is removed.
Stainless steel has simi protective layer??
Stainless steel is a
composite metal. Stainless steel
composition varies by grade, but all stainless steels contain at least 10.5% chromium, which is essential for their corrosion resistance. Common alloying elements include nickel, molybdenum, manganese, and silicon. The most common grade, 304, typically contains 18% chromium and 8% nickel, while 316 adds 2% molybdenum for increased corrosion resistance
304 Stainless Steel:
18% Chromium, 8% Nickel, 0.08% Carbon, 2% Manganese, 0.75% Silicon, 0.045% Phosphorus, 0.03% Sulfur
316 Stainless Steel:
16-18% Chromium, 10-14% Nickel, 2-3% Molybdenum, up to 2% Manganese, up to 0.75% Silicon, up to 0.10% Nitrogen, up to 0.08% Carbon, up to 0.045% Phosphorus, up to 0.03% Sulfur
310 Stainless Steel:
23-27% Chromium, 0-1% Manganese, 0.01-0.08% Carbon
https://www.unifiedalloys.com/blog/stainless-grades-families