Laboratory weight loss corrosion tests were performed on two types of commercially available corrosion resistant alloys (CRA), 13Cr martensitic stainless steel and a duplex alloy (22% Cr, 5 1/2% Ni, 3% Mo ferritic-austenitic stainless steel), in simulated acidizing environments of 15% hydrochloric acid and 12%-3% hydrochloric-hydrofluoric acid mixture (12-3 HCl-HF). Inhibition of these alloys by proprietary low alloy inhibitors has provided only marginal results as well as a sensitivity to the presence of fluoride. Use of newly developed high alloy inhibitors has enabled corrosion control at elevated temperatures and partially removed the sensitivity to fluoride ion.

Subject
Acids, Acid inhibitors, Corrosion resistant alloys, Stainless alloys, Nickel based alloys, Commercial alloys, Tubing, Corrosion losses, Corrosion inhibitors, Steel, Corrosion protection, Ferrite, Alloys
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1986
Association for Materials Protection and Performance (AMPP)
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