Yes, stainless steel often turns green in color. Particularly, that green color in stainless steel is chromium oxide. Regardless, this chromium oxide is formed if there is too much oxygen around. Simultaneously, a 316L stainless steel is highly resistant to corrosion but never impervious to rust. Moreover, there is chloride in stainless steel that is a superior cause of rust. Specifically, those who see a certain green color on their stainless steel kitchen knives, do not be shocked by it. The reason for such changes is the chromium oxide in stainless steel.