Pitting corrosion of AISI 420 stainless steel in detergent–disinfectant solutions based on Catamine AB. Inhibiting effect of sulfate ions

Dorofeeva, V.N.; Shcherbakov, A.I.; Korosteleva, I.G.; Kasatkina, I.V.; Kornienko, L.P.; Kasatkin, V.E.

Авторы: Dorofeeva V.N., Shcherbakov A.I., Korosteleva I.G., Kasatkina I.V., Kornienko L.P., Kasatkin V.E.
Журнал: International Journal of Corrosion and Scale Inhibition
Том: 11
Номер: 2
Год издания: 2022
Издательство: Некоммерческое партнерство коррозионистов "Вакор"
Местоположение издательства: Москва
Первая страница: 659
Последняя страница: 665
DOI: 10.17675/2305-6894-2022-11-2-14
Аннотация: The possibility of pitting corrosion of AISI 420 stainless steel in solutions based on CatamineAB is considered. It has been shown that at the concentrations of Catamine AB used inpractice, there is a possibility of pitting corrosion. This probability increases with an increasein Catamine AB concentration. Catamine AB is a commercial product used for processingvarious materials, including steels, for the purpose of washing and disinfection. The productcontains chlorides in the form of quaternary ammonium salts. Chlorides can be the cause ofpitting corrosion. In this paper, the resistance to pitting of AISI 420 stainless steel used inmedical devices has been investigated. The influence of Catamine AB concentration rangerecommended by the manufacturer has been studied. The studies were carried out with thepolarization curves of the forward and reverse sweep. The dependence of the pitting formationpotential on the concentration of Catamine AB, which is described by a straight line inlogarithmic coordinates, has been obtained. Based on this dependence, three areas of CatamineAB concentrations can be distinguished for which it is possible to predict the differentbehavior of steel in relation to pitting. The first area of low concentrations of the productprovides complete resistance to pitting formation. In the region of average concentrations ofCatamine AB, pitting is possible when the potential is shifted to the anodic region due to adecrease in cathodic depolarization. And finally, in the third area of high productconcentrations, steel is unstable to pitting. Thus, the concentration range recommended for useby the manufacturer includes the area of occurrence of pitting even on stainless steel. Thepossibility of increasing the threshold concentration of Catamine AB by adding sulfates to thesolution has been studied. The results showed that although a certain positive effect can beachieved, it is not as great as we would like, since too much sulfate is required to suppresspitting corrosion. This is hardly acceptable due to the possible deterioration of the consumerproperties of the product.
Добавил в систему: Касаткин Вадим Эдуардович

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Pitting corrosion of AISI 420 stainless steel in detergent–disinfectant solutions based on Catamine AB. Inhibiting effect of sulfate ionsстатья

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