Bai Ziheng, Xiao Kui, Dong Pengfei, Dong Chaofang, Wei Dan, Li Xiaogang
Corrosion and Protection Center, University of Science and Technology Beijing Beijing 100083 China
Institute of Advanced Materials and Technology, University of Science and Technology Beijing Beijing 100083 China.
RSC Adv. 2018 Dec 5;8(71):40544-40553. doi: 10.1039/c8ra08032a. eCollection 2018 Dec 4.
The corrosion behavior of metal materials in soil environments has been intensively studied recently. Even so, the detailed corrosion mechanisms remain elusive, especially regarding the role of metal ions. In this study, we investigated the effect of ion diffusion on the corrosion processes of carbon steel scanning electron microscopy (SEM), laser Raman spectroscopy and scanning Kelvin probe (SKP). It was found that the Fe diffusion was a key factor to the corrosion rate, as well as the formation of corrosion products. Typically, the corrosion products suppressed the diffusion of ions to the surface of carbon steels, and thus the cation diffusion coefficient played a significant role in formation processes of corrosion products, which furthermore affected the corrosion processes of the carbon steels.
近年来，金属材料在土壤环境中的腐蚀行为受到了广泛研究。即便如此，详细的腐蚀机制仍不明确，尤其是金属离子的作用。在本研究中，我们利用扫描电子显微镜（SEM）、激光拉曼光谱和扫描开尔文探针（SKP）研究了离子扩散对碳钢腐蚀过程的影响。结果发现，铁的扩散是影响腐蚀速率以及腐蚀产物形成的关键因素。通常情况下，腐蚀产物会抑制离子向碳钢表面的扩散，因此阳离子扩散系数在腐蚀产物的形成过程中起着重要作用，进而影响了碳钢的腐蚀过程。
