Technical note Weight loss investigation of alternating voltage corrosion of 301,304,and 316 stainless steels in boiling NaCI solution

Abstract

Alternating voltage corrosion of types 301, 304, and 316 stainless steels in an aqueous boiling NaCl solution under continuous reflux was investigated through weight loss measurements as a function of time. Specimens of each type of stainless steel were used as electrodes to heat the solution by the Joule effect using pure outlet alternating voltage modulation (127 V, 60 Hz). Pitting corrosion was observed in all cases, but it was severe for 304 and less marked for 301. This led to average percentage weight losses, after 1500 h of experiment, of up to 30%, 21%, and 16% for the 304, 316, and 301 steels respectively. The enhanced pitting corrosion of the 304 steel agrees with results previously reported in the literature by other authors.

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