低合金钢中夹杂物诱发局部腐蚀萌生机制的研究进展
Research Progress on Initiation Mechanism of Local Corrosion Induced by Inclusions in Low Alloy Steel
低合金钢中夹杂物诱发局部腐蚀萌生机制的研究进展 |
| 刘超, 陈天奇, 李晓刚 |
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Research Progress on Initiation Mechanism of Local Corrosion Induced by Inclusions in Low Alloy Steel |
| LIU Chao, CHEN Tianqi, LI Xiaogang |
| 图2 Al2O3，ZrO2-Ti2O3-Al2O3和(RE)2O2S-(RE) x S y -(RE, Zr, Ti)O x 的SEM谱，CAAFM以及相应的高度/电流分布图；在pH=4.9的西沙模拟液中浸泡30 min后ZrO2-Ti2O3-Al2O3和(RE)2O2S-(RE) x S y -(RE,Zr,Ti)O x -(RE)AlO3的腐蚀形貌及Al2O3和ZrO2-Ti2O3-Al2O3的KAM图，高KAM代表钢基体的局部塑性变形发生在不易变形的夹杂物周围，且机械形变会导致表面电化学异质性的重新分布[ |
| Fig.2 SEM and CAAFM images of Al2O3(a), ZrO2-Ti2O3-Al2O3 (b) and (Re)2O2S-(Re) x S y -(Re, Zr, Ti)O x (c) and their corresponding height/current distribution diagrams, corrosion morphology of ZrO2-Ti2O3-Al2O3 and ((RE)2O2S-(RE) x S y -(RE,Zr,Ti)O x -(RE)AlO3 after soaking in simulated Xisha solution with pH=4.9 for 30 min (d), and KAM diagrams of Al2O3 and ZrO2-Ti2O3-Al2O3 (e). The high KAM indicates that the local plastic deformation of the steel matrix occurs around the inclusion which is difficult to deform, and the mechanical deformation will lead to the redistribution of the surface electrochemical heterogeneity [ |
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