Corrosion resistance of stainless steel

It’s conditional for stainless steel to resist corrosion. This photo was taken from a door in a hotel during the pandemic. The door knobs were made by stainless steel, but the knobs was periodically sprayed with sodium hypochlorite solutions (NaClO) to inactivate the possible coronaviruses (disinfection). As a result, not too long, the knobs lost its luster, instead of many foamous spots on the surface. Of cource, the microbes would not be able to survive within such environment.

不锈钢的耐腐蚀性是有条件的。这张照片拍摄于疫情期间某酒店的一扇门上。这扇门的把手由不锈钢制成，但为了灭活可能存在的冠状病毒（即进行消毒），把手被定期喷洒次氯酸钠（NaClO）溶液。结果没过多久，这些把手便失去了原有的光泽，表面取而代之的是许多泡沫状的斑点。当然，在这样的环境下，微生物自然无法存活。