Stainless steel’s resistance to rusting results from the presence of chromium in the alloy, which forms a passive film that protects the underlying material from corrosion attack, and can self-heal in the presence of oxygen: 3 Corrosion resistance can be increased further by the following means,
increase chromium content to more than 11%, add nickel to at least 8% and add molybdenum (which also improves resistance to pitting corrosion)
