Effect of tin addition on corrosion behavior of a low-alloy steel in simulated costal-industrial atmosphere. Issue 7 (July 2019)

• Record Type: Journal Article
• Authors: Liu, Bo; Mu, Xin; Yang, Ying; Hao, Long; Ding, Xueyong; Dong, Junhua; Zhang, Zhe; Hou, Huaxing; Ke, Wei
• Is Part Of: Journal of materials science & technology. Volume 35:Issue 7(2019)
• Page Start: 1228
• Page End: 1239
• Publication Date: 2019-07
• Subjects: Weathering steel -- Atmospheric corrosion -- Coastal-industrial atmosphere -- Tin addition -- Rusting evolution; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2019.01.008
• Languages: English
• ISSNs: 1005-0302

Abstract

Abstract: The effect of tin addition on the atmospheric corrosion behavior of a low-alloy steel in simulated coastal-industrial 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 Fe3 O4 than the tin-free steel rust layer.