抄録
Pitting corrosion and its protection of stainless steel were studied by using an electrochemical technique. In order to prevent pitting corrosion, it is important to know the inversion potential at which the repassivation of pit begins to undergo. This potential was a function of the bulk concentration of chloride ions and the time of polarization. The alkylamines which had the alkyl groups of large carbon numbers, i. e., di-n-amylamine and di-n-hexylamine were beneficial as the inhibitors of pitting corrosion of stainless steel. Pitting corrosion played an important role in stress corrosion cracking. Inversion potential was also important as a characteristic value to determine the susceptibility to such a cracking. And such a cracking will be prevented in the region between the inversion and the protection potentials.
