Abstract The effect of Ca 2+ on the corrosion behavior of 3Cr steel was investigated using immersion tests and electrochemical measurements. The results demonstrated that with an increase in Ca 2+ concentration in the solution, the corrosion rate of 3Cr steel decreased and the Ca 2+ content in the corrosion scale increased. Ca is involved in the formation of both the inner and outer corrosion scales of 3Cr steel. Polarization curves revealed that Ca 2+ could enhance the pseudopassivation of 3Cr steel. EIS results demonstrated that Ca 2+ can decrease the porosity of corrosion films. Additionally, Ca 2+ could accelerate the precipitation of FeCO 3 (Ca x Fe 1−x CO 3 ) by reducing its solubility and saturation degree.

中文翻译：

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不同Ca 2+ 浓度下3Cr钢在CO 2 环境中的腐蚀行为及机理

摘要 采用浸泡试验和电化学测量方法研究了Ca 2+ 对3Cr 钢腐蚀行为的影响。结果表明，随着溶液中Ca 2+ 浓度的增加，3Cr钢的腐蚀速率降低，腐蚀皮中Ca 2+ 含量增加。Ca参与了3Cr钢内外锈皮的形成。极化曲线显示Ca 2+ 可以增强3Cr钢的假钝化。EIS 结果表明Ca 2+ 可以降低腐蚀膜的孔隙率。此外，Ca 2+ 可以通过降低其溶解度和饱和度来加速FeCO 3 (Ca x Fe 1-x CO 3 )的沉淀。