Abstract The protection mechanism and corrosion behavior of the Pd film-plated stainless steel in a boiling H 2 SO 4 solution were investigated in this paper. Potentiodynamic measurements, galvanic corrosion tests, electrochemical impedance spectroscopy and X-ray photoelectron spectroscopy were conducted to study the electrochemical modification effect of the Pd film on the passivation of stainless steel substrate. The results showed that the Pd film mainly influenced the cathodic process of corrosion. The corrosion potential of the Pd-plated stainless steel was determined by the cathode/anode area ratio. The degradation process of Pd film-plated stainless steel included three stages: stable passivation, slow corrosion and accelerated corrosion.

中文翻译：

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镀钯膜不锈钢在沸腾H 2 SO 4 溶液中的耐蚀机理

摘要 研究了镀Pd膜不锈钢在沸腾的H 2 SO 4 溶液中的保护机制和腐蚀行为。通过动电位测量、电偶腐蚀试验、电化学阻抗谱和X射线光电子能谱研究了Pd薄膜对不锈钢基体钝化的电化学改性作用。结果表明，Pd膜主要影响阴极腐蚀过程。镀钯不锈钢的腐蚀电位由阴极/阳极面积比决定。镀钯膜不锈钢的降解过程包括稳定钝化、缓慢腐蚀和加速腐蚀三个阶段。