耐候钢
腐蚀
材料科学
Rust(编程语言)
风化作用
碳钢
冶金
大气(单位)
图层(电子)
电化学
拉曼光谱
介电谱
复合材料
电极
化学
光学
地质学
物理
物理化学
地貌学
计算机科学
热力学
程序设计语言
作者
Q.C Zhang,Wu Jun,Jianghua WANG,Wei-yang Zheng,J.G Chen,A.B Li
标识
DOI:10.1016/s0254-0584(02)00110-4
摘要
The corrosion behavior of weathering steel and carbon steel exposed in marine atmosphere for 4 years were studied by means of regression analysis, rust structure observation, X-ray diffraction, Raman spectrum and electrochemical impedance spectra techniques. The results show that the corrosion procedure of weathering steel is divided into two steps. In the first step, the corrosion rate is higher, while in the second step the corrosion rate is remarkably reduced due to a compact rust layer formed gradually during exposure. The compact rust layer on weathering steel, darkened observed using polarized light, is composed of Cr substitute iron oxyhydroxide. Furthermore, an equivalent circuit is set up to represent the interfaces between rusted steels and 3% NaCl solution, and the rust layer resistances of the steels were deduced from an extrapolation of the electrochemistry impedance spectra to estimate the protective properties.
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