Effect of tin addition on corrosion behavior of a low-alloy steel in simulated costal-industrial atmosphere
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2019年第7期
论文作者：Bo Liu Xin Mu Ying Yang Long Hao Xueyong Ding Junhua Dong Zhe Zhang Huaxing Hou Wei Ke
文章页码：1228 - 1239
摘 要：The effect of tin addition on the atmospheric corrosion behavior of a low-alloy steel in simulated coastalindustrial atmosphere has been investigated by indoor wet/dry cyclic corrosion test（CCT）. The results indicate that tin addition can obviously make the steel substrate more resistant to atmospheric corrosion by suppressing the cathodic H+ reduction reaction, and but tin addition is not of obvious beneficial effect when the steel is covered with a thicker rust layer during long-term corrosion process. The reason lies in the fact that the presence of un-reduced H+can lower the electrolyte pH value and lead to a loose and porous rust layer on tin-containing steel sample than that on tin-free steel sample. In addition, the 120 CCT cycles corrosion process of the two steels can be divided into three stages. Both the tin-free and tin-containing steels show an increasing corrosion rate during the initial corrosion stage and then exhibit a decreasing corrosion rate during the second and third corrosion stages. Moreover, tin addition makes the tin-containing steel rust layer have a higher amount of α-FeOOH and lower amount of γ-FeOOH and Fe3O4 than the tin-free steel rust layer.
Bo Liu，Xin Mu，Ying Yang，Long Hao，Xueyong Ding，Junhua Dong，Zhe Zhang，Huaxing Hou，Wei Ke
School of Metallurgy, Northeastern UniversityEnvironmental Corrosion Research Centre of Materials, Institute of Metal Research, Chinese Academy of SciencesAnsteel Co., Ltd.
摘 要：The effect of tin addition on the atmospheric corrosion behavior of a low-alloy steel in simulated coastalindustrial atmosphere has been investigated by indoor wet/dry cyclic corrosion test（CCT）. The results indicate that tin addition can obviously make the steel substrate more resistant to atmospheric corrosion by suppressing the cathodic H+ reduction reaction, and but tin addition is not of obvious beneficial effect when the steel is covered with a thicker rust layer during long-term corrosion process. The reason lies in the fact that the presence of un-reduced H+can lower the electrolyte pH value and lead to a loose and porous rust layer on tin-containing steel sample than that on tin-free steel sample. In addition, the 120 CCT cycles corrosion process of the two steels can be divided into three stages. Both the tin-free and tin-containing steels show an increasing corrosion rate during the initial corrosion stage and then exhibit a decreasing corrosion rate during the second and third corrosion stages. Moreover, tin addition makes the tin-containing steel rust layer have a higher amount of α-FeOOH and lower amount of γ-FeOOH and Fe3O4 than the tin-free steel rust layer.
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