ABSTRACT A model of the electrochemistry in a stress corrosion crack in martensitic stainless steel in low-chloride containing solution has been applied to predict the impact of the hydroxide ion–chloride ion ratio in the bulk solution on the local electrode potential and solution chemistry. Computations were undertaken for bulk chloride ion concentrations between 0.1 and 1000 ppm (by mass) and bulk pH values between 6.0 and 11.5. For near-neutral pH, a significant deviation of crack-tip electrochemistry from the bulk electrochemistry is predicted. However, above pH 9.5, a hydroxide-dominated regime is encountered with uniformity of potential, pH and chloride concentration.

中文翻译：

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氢氧根离子-氯离子浓度比对裂纹电化学的影响

摘要 马氏体不锈钢在低氯化物溶液中应力腐蚀裂纹中的电化学模型已被应用于预测本体溶液中氢氧根离子-氯离子比对局部电极电位和溶液化学的影响。对 0.1 到 1000 ppm（质量）之间的大量氯离子浓度和 6.0 到 11.5 之间的大量 pH 值进行了计算。对于接近中性的 pH 值，预测裂纹尖端电化学与体电化学的显着偏差。然而，当 pH 值高于 9.5 时，会遇到以氢氧化物为主的状态，电位、pH 值和氯化物浓度均一。