SUS304ステンレス鋼のHCl/エタノール及びNaCl/エタノール水溶液中における孔食特性

概要

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The wide use of organic solvents, in recent years, has given new importance to the study of pitting corrosion of stainless steel in organic solutions, but reports on pitting corrosion behavior in ethanolic solutions are few and far between. This paper thus reports on a technique using a potentiostat to investigate the pitting corrosion behavior of SUS 304 stainless steel in HCl/ethanol and NaCl/ethanol aqueous solutions. The experimental results obtained are summerized as follows:1. The pitting potential shifted to the high side with increases in scanning rate.2. The pitting potential shifted to the low side with increases in the mole concentration of hydrochloric acid and NaCl.3. The pitting potential shifted to the high side with increases in the percentage concentration of ethanol.4. Ethyl ion in ethanol served as a kind of organic inhibitor of pitting corrosion within the limits of the present study.
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