What happened to the stainless steel on the cabinet door?
Stainless steel is not completely free from corrosion. In the wet, temperature change (temperature changes) and dirty (powder or even long-term friction.) the environment will accelerate the oxidation of the material. In addition, because of the different processing technology, the chemical properties of the material will behave differently.
Stainless steel is a corrosion resistant alloy steel collectively, but according to the material composition of the difference is very different. At present, the stainless steel in the kitchen is mainly stainless steel 304. According to various standards, the ingredients are also different.
When removed as a stain, it should be oxidized.
