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Effect of initial CaCO3 saturation levels on the CO2 corrosion of 1Cr carbon steel
Materials and Corrosion ( IF 1.6 ) Pub Date : 2021-01-08 , DOI: 10.1002/maco.202011822 Riccardo Rizzo 1, 2 , Rajan Ambat 1
Materials and Corrosion ( IF 1.6 ) Pub Date : 2021-01-08 , DOI: 10.1002/maco.202011822 Riccardo Rizzo 1, 2 , Rajan Ambat 1
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This paper presents the investigation on the effect of calcium on the corrosion behavior of 1Cr carbon steel under various levels of initial CaCO3 saturation (
) of the bulk solutions. All the experiments were performed at 80°C in 1 wt% aqueous NaCl solution saturated with CO2. Four initial 
levels were investigated, namely 0, 0.6, 2, and 10. The corrosion process was followed using linear polarization resistance, potentiodynamic sweeps, and electrochemical impedance spectroscopy. The surface morphology of the corrosion products was analyzed with scanning electron microscopy and structural information using X-ray powder diffraction. Precipitation of a substitutional solid solution of FexCayCO3 (x + y = 1) was found on the steel surface. The growth of this layer was delayed by Ca2+ ions in the solution, but its protectiveness was not affected and was comparable with the pure FeCO3 corrosion product. No signs of localized corrosion were detected on the material.
中文翻译：
初始 CaCO3 饱和度对 1Cr 碳钢 CO2 腐蚀的影响
本文介绍了在本体溶液的各种初始 CaCO 3饱和度 ()下，钙对 1Cr 碳钢腐蚀行为的影响的研究。所有实验均在 80°C 下在用 CO 2饱和的 1 wt% NaCl 水溶液中进行。研究了四个初始水平，即 0、0.6、2 和 10。使用线性极化电阻、动电位扫描和电化学阻抗谱跟踪腐蚀过程。使用扫描电子显微镜分析腐蚀产物的表面形貌，并使用 X 射线粉末衍射分析结构信息。Fe x Ca y CO 3置换固溶体的沉淀( x + y = 1) 是在钢表面上发现的。该层的生长被溶液中的Ca 2+离子延迟，但其保护性不受影响，可与纯 FeCO 3腐蚀产物相媲美。在材料上没有检测到局部腐蚀的迹象。
更新日期：2021-01-08
) of the bulk solutions. All the experiments were performed at 80°C in 1 wt% aqueous NaCl solution saturated with CO2. Four initial levels were investigated, namely 0, 0.6, 2, and 10. The corrosion process was followed using linear polarization resistance, potentiodynamic sweeps, and electrochemical impedance spectroscopy. The surface morphology of the corrosion products was analyzed with scanning electron microscopy and structural information using X-ray powder diffraction. Precipitation of a substitutional solid solution of FexCayCO3 (x + y = 1) was found on the steel surface. The growth of this layer was delayed by Ca2+ ions in the solution, but its protectiveness was not affected and was comparable with the pure FeCO3 corrosion product. No signs of localized corrosion were detected on the material.
中文翻译：
初始 CaCO3 饱和度对 1Cr 碳钢 CO2 腐蚀的影响
本文介绍了在本体溶液的各种初始 CaCO 3饱和度 (
)下，钙对 1Cr 碳钢腐蚀行为的影响的研究。所有实验均在 80°C 下在用 CO 2饱和的 1 wt% NaCl 水溶液中进行。研究了四个初始水平，即 0、0.6、2 和 10。使用线性极化电阻、动电位扫描和电化学阻抗谱跟踪腐蚀过程。使用扫描电子显微镜分析腐蚀产物的表面形貌，并使用 X 射线粉末衍射分析结构信息。Fe x Ca y CO 3置换固溶体的沉淀( x + y = 1) 是在钢表面上发现的。该层的生长被溶液中的Ca 2+离子延迟，但其保护性不受影响，可与纯 FeCO 3腐蚀产物相媲美。在材料上没有检测到局部腐蚀的迹象。
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