High-temperature inhibitors of stainless steel corrosion in sulfuric acid solutionsстатья
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Дата последнего поиска статьи во внешних источниках: 20 марта 2018 г.
Аннотация:The corrosion of chromium-nickel steel 08Kh18N10T in 2 M H2SO4 has been studied in a broad temperature range, t = 0–200°C. Under these conditions, the metal corrosion is enhanced with an increase in t to reach 9.7 kg/(m2·h) at 200°C. It has been shown that a formulation of IFKhAN-92 inhibitor (a substituted triazole) with KI in a molar ratio of 1 : 1 protects this steel in 2 M H2SO4 at temperatures up to 140°C, inclusive. The threecomponent mixture of IFKhAN-92, KI and urotropine (1:1:4) is more promising in this respect, as it efficiently inhibits corrosion at temperatures up to 180°C and allows the protective effect to be maintained for at least 8 h. This formulation also reliably protects low-carbon steel 20 in 2 M H2SO4 at temperatures up to 180°C, inclusive; what is more, corrosion slows down with time in the presence of this mixture.