Chemisorption and Catalysis in Polythionic/Thiosulfate Stress Corrosion Cracking

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Abstract
The stress corrosion cracking of sensitized stainless steels due to thiosulfate and tetrathionate has been associated with an increased rate of anodic dissolution in the active‐passive region of voltammetric scans, via the mutual sensitivity of both phenomena to a series of anionic inhibitors. The increased anodic dissolution is caused by the adsorption of the sulfur compound and its catalysis of metal oxidation. The inhibitors function, not by competitively desorbing the corrodent, but by aiding the passivation process.

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