通过Mott-Schottky法和失重法, 研究了两种阴离子溶液(Na₂SO₄和NaHCO₃)对P110钢表面富铁相硫化亚铁(FeS_1-x)腐蚀产物膜保护性的影响, 并通过X射线衍射(XRD)、X射线光电子能谱(XPS)和扫描电镜(SEM)对其保护性的变化进行了解释。结果表明: 经过Na₂SO₄溶液浸泡的腐蚀产物膜更容易发生电子转移和溶质扩散, 表现为p型半导体特性, 保护性较差; 经过NaHCO₃溶液浸泡后, 电子转移和溶质扩散得到减缓, 腐蚀产物膜表现为n型半导体特性, 保护性较好。

The effect of two anionic solutions (Na₂SO₄ and NaHCO₃) on the protection of the corrosion product film, iron-rich phase ferrous sulfide (FeS_1-x), on the surface of P110 steel was studied through Mott-Schottky method and weight loss method. The changes of protection were explained by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). The results show that the corrosion product film immersed in Na₂SO₄ solution was more prone to electron transfer and solute diffusion, and exhibited p-type semiconductor characteristics and poor protection. The electron transfer and solute diffusion were slowed down in the corrosion product film immersed in NaHCO₃ solution, and the corrosion product film exhibited n-type semiconductor characteristics and good protection.