Stainless steel usually contain chromium, nickel and titanium, stainless steel because of its special structure and surface passivation film, so that it is in general difficult and media reactions and corrosion, but not in any conditions cannot be corrosion. In the corrosive medium and predisposing factors (such as scratch, splash, cutting slag) under the condition of the existence of stainless steel and corrosion medium can also slow chemical and electrochemical reactions of corrosion, and the corrosion rate under certain conditions is fast and have corrosion, especially pitting and crevice corrosion. The corrosion mechanism of stainless steel parts is electrochemical corrosion. Therefore, all effective measures should be taken in the processing of stainless steel products, so as to avoid the occurrence of corrosion conditions and incentives. In fact, many corrosion conditions and incentives (such as scratch, splash, slag cutting, etc.) have a significant negative impact on the appearance quality of products, and should also be overcome.
