Abstract The corrosion characteristics of SUS304 exposed to 0.5 M Cl− aqueous solution containing different metal cations were studied with immersion tests, surface analysis and electrochemical tests. The mechanism of corrosion with metal cations was clarified by the XPS analysis results together with the hard and soft acid and base (HSAB) concept and the passive films structure. It is supposed that metal cations with large hardness make a layer by chemical bonding with the passive films. The passive films are protected by the metal cation layer from Cl− attack, and consequently corrosion reactions are inhibited.

中文翻译：

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0.5 M Cl-水溶液中金属阳离子对SUS304的缓蚀作用

摘要 通过浸泡试验、表面分析和电化学试验研究了SUS304暴露于含有不同金属阳离子的0.5 M Cl−水溶液中的腐蚀特性。XPS 分析结果以及硬和软酸碱 (HSAB) 概念和钝化膜结构阐明了金属阳离子腐蚀的机制。据推测，硬度大的金属阳离子通过与钝化膜的化学键合形成一层。钝化膜受到金属阳离子层的保护，免受 Cl- 侵蚀，从而抑制腐蚀反应。