Ca ^ 的效果 2 在包含 Ca ^ 的不同集中的一块油地的模仿的阶层水里在到 X65 管道钢的 CO2 腐蚀上被调查 2。它被发现 2 能提高的那 Ca ^ 腐蚀率,特别在 Ca ^ 从 256 ~ 512 mg/L 的 2 集中,它能与增加 Ca ^ 被归因于成长谷物尺寸和腐蚀规模的松开的结构 2 集中。X 光检查衍射 XRD 和 X 光检查光电子光谱学 XPS 调查表明建筑群焦化 Fe, CaCO3 由于 Fe ^ 的渐渐的代替在高 Ca ^ 形成 2 集中 2 在由 Ca ^ 的 FeCO3 2。
The effect of Ca^2+ on CO2 corrosion to X65 pipeline steel was investigated in the simulated stratum water of an oil field containing different concentrations of Ca^2+. It is found that Ca^2+ can enhance the corrosion rate, especially in the Ca^2+ concentration from 256 to 512 mg/L, which can be attributed to the growing grain size and loosing structure of corrosion scales with increasing Ca^2+ concentration. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) investigations reveal that a complex carbonate (Fe, Ca)CO3 forms at high Ca^2+ concentration due to the gradual replacement of Fe^2+ in FeCO3 by Ca^2+.