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| 镀铬板表面初始腐蚀机制的研究 | |
| 引用本文： | 李秀军,韦晓,薛彦鹏. 镀铬板表面初始腐蚀机制的研究[J]. 电镀与涂饰, 2021, 40(5): 369-376. DOI: 10.19289/j.1004-227x.2021.05.010 |
| 作者姓名： | 李秀军 韦晓 薛彦鹏 |
| 作者单位： | 宝山钢铁股份有限公司冷轧厂,上海 201900;北京科技大学国家材料服役安全科学中心,北京 100083 |
| 摘 要： | 为了解镀铬板的初始腐蚀机制,利用扫描电子显微镜(SEM)、X射线能量色散谱仪(EDS)和X射线光电子能谱仪(XPS)研究了分别在25℃和40℃的3.5％NaCl溶液中浸泡不同时间后镀铬板的腐蚀形貌和组成.结果表明:镀铬板腐蚀优先发生在缺陷处,这是由于缺陷处粗糙度较大,容易吸附大量氯离子.镀铬板表面钝化膜主要由Cr2O3... |
| 关 键 词： | 镀铬板 钝化膜 腐蚀机制 缺陷 形貌 X射线光电子能谱 |
Study on initial corrosion mechanism of tin-free steel surface |
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| LI Xiujun,WEI Xiao,XUE Yanpeng. Study on initial corrosion mechanism of tin-free steel surface[J]. Electroplating & Finishing, 2021, 40(5): 369-376. DOI: 10.19289/j.1004-227x.2021.05.010 | |
| Authors: | LI Xiujun WEI Xiao XUE Yanpeng |
| Affiliation: | (Cold rolled plant,Baoshan Iron&Steel Co.,Ltd.,Shanghai 201900,China;National Center for Materials Service Safety,University of Science and Technology Beijing,Beijing 100083,China) |
| Abstract: | In order to understand the initial corrosion mechanism of tin-free steel,the corrosion morphology and composition of tin-free steel after being immersed in 3.5%NaCl solution at 25℃ and 40℃ respectively for different time were studied using scanning electron microscope(SEM),energy-dispersive X-ray spectrometer(EDS),and X-ray photoelectron spectroscope(XPS).The results showed that the corrosion occurred firstly at the defects of tin-free steel where the roughness was high and lots of chloride ions could be absorbed easily.The passive film on tin-free steel surface was mainly composed of Cr2O3,Cr(OH)3,and metallic chromium.After being immersed in 3.5%NaCl solution,FeO and Fe2O3were the primary oxides on the surface of tin-free steel.The divalent Fe converted to the trivalent Fe gradually with the extending of immersion time. |
| Keywords: | tin-free steel passive film corrosion mechanism defect morphology X-ray photoelectron spectroscopy |
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