Corrosion of nickel alloys is of great significance to the Chemical Process Industries (CPI), as it relates to process streams. However, only limited data are available in mixed acid environments. The effects of combinations of sulfuric and hydrochloric acids and of nitric and hydrofluoric acids on corrosion of commercially significant nickel alloys and austenitic stainless steel are examined. Alloys which exhibited passive behavior in single acid environments showed increased corrosion in mixed acids, with unexpected localized corrosion for some alloys in certain combinations of acids. Alloys are ranked as to corrosion resistance.

Subject
Acids, Corrosion resistant alloys, Corrosion rate, Isocorrosion diagram, Nickel based alloys, Molybdenum alloys, Charts, Mixtures, Commercial alloys, Corrosion resistance, Localized corrosion, Alloys, Hydrochloric acid
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1989
Association for Materials Protection and Performance (AMPP)
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