Abstract Cathodic kinetics in magnesium chloride (MgCl2) solutions were investigated on platinum (Pt) and stainless steel 304 L (SS304 L). Density, viscosity, and dissolved oxygen concentration for MgCl2 solutions were also measured. A 2-electron transfer for oxygen reduction reaction (ORR) on Pt was determined using a rotating disk electrode. SS304 L displayed non-Levich behavior for ORR and, due to ORR suppression and buffering of near surface pH by Mg-species precipitation, the primary cathodic reaction was the hydrogen evolution reaction (HER) in saturated MgCl2. Furthermore, non-carbonate precipitates were found to be kinetically favored. Implications of HER are discussed through atmospheric corrosion and stress corrosion cracking.

中文翻译：

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氯化镁溶液中析氢反应对不锈钢的重要性

摘要 在铂 (Pt) 和不锈钢 304 L (SS304 L) 上研究了氯化镁 (MgCl2) 溶液中的阴极动力学。还测量了 MgCl2 溶液的密度、粘度和溶解氧浓度。使用旋转圆盘电极测定 Pt 上氧还原反应 (ORR) 的 2 电子转移。SS304 L 对 ORR 表现出非列维奇行为，并且由于 ORR 抑制和镁物质沉淀对近表面 pH 的缓冲，主要阴极反应是饱和 MgCl2 中的析氢反应 (HER)。此外，发现非碳酸盐沉淀在动力学上是有利的。通过大气腐蚀和应力腐蚀开裂讨论了 HER 的影响。