PS Cleaning is a kind of steel difficult to get rusty, however it is not that the resistance to corrosion is inherent in itself but that there is a layer of acidic film that is called “Passive Film” formed on the surface of steel, which serves the function of the resistance to corrosion. When the component of chromium is up to more than 12% in the content of PS Cleaning, there will a layer of a passive film (thickness 1 ~3nm) invisible to the naked eye and difficult to react with oxygen in the atmosphere formed on the surface of PS Cleaning.

Having cleared off the oil on the surface of PS Cleaning, immerse it in the acidified liquid (for example: nitric acid) and smear it with the acidified liquid, so that there is passivation phenomenon formed on the surface of PS Cleaning. In addition, for those products that have undergone electrolytic polishing, if further passivation-treated, the passive film on them will be reinforced.