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Credibility ,Metal corrosion, according to management mechanism can be divided into special corrosion, chemical corrosion and electrochemical corrosion of metal corrosion in engineering practice, most belong to electrochemical corrosion.
The main form of corrosion of stainless steel corrosion (surface corrosion), pitting corrosion, crevice corrosion and stress corrosion.
Corrosion
Corrosion is galvanic corrosion of metal surfaces all media phenomenon of corrosion. According to different requirements resorted to different indicators, generally divided into two main categories:
1. Stainless steel refers to the atmosphere and weak corrosion of steel corrosion medium. Corrosion rate of less than 0.01mm is "totally corrosion"; corrosion rate of less than 0.1mm / year, considered "corrosion" of.
2. Corrosion of steel refers to a variety of strong corrosive medium to corrosion of steel.
Pitting corrosion
Pitting corrosion is the metal surface in the most non-corrosive or highly corrosion of mild and scattered occurrence of localized corrosion, corrosion point of common size is less than 1.00mm, the depth is often greater than the surface aperture, light shallow pits those who have serious even the formation of perforation.
Crevice corrosion
Crevice corrosion is occurring in the metal component crevice corrosion pits dot-like view, this is a localized corrosion.
Intergranular corrosion
Intergranular corrosion is a selective corrosion damage, it is with the Department, is the microscopic scale localized corrosion, while the macro is not necessarily local.
Stress corrosion cracking (SCC)
Stress corrosion cracking is to bear the stress of the alloy in the corrosive environment because of strong expansion of the alternate failure pattern of a generic term.
General corrosion
General corrosion is used to describe the alloy surface are spoon way to compare the corrosion occurred in the terminology. In case of general corrosion, the village gradually thinner material because of corrosion, corrosion or failure. Stainless steel in strong acid and alkali corrosion may be present round. Comprehensive failure caused by corrosion of the problem is not how worrying, because, this corrosion can often be a simple soak test or inspection Fushi's literature information predict it.
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