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Electrochemical corrosion failure mechanism of M152 steel under a salt-spray environment

ISSN号：1005-748X
期刊名称：《腐蚀与防护》
时间：0
分类：TG174.36[金属学及工艺—金属表面处理;金属学及工艺—金属学] V267[航空宇航科学与技术—航空宇航制造工程]
作者机构：[1]Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China, [2]Institute of Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China, [3]State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao 266101, China, [4]Ningbo Institute of Material Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, China
相关基金：financially supported by the Major State Basic Research Development Program of China （No. 2014CB643300）.

作者： Pan Yi[1], Kui Xiao[1,2], Kang-kang Ding[1,3], Xu Wang[1], Li-dan Yan[1], Cheng-liang Mao[1], Chao-fang Dong[1,2], Xiao-gang Li[1,2,4]

关键词：电化学腐蚀, 盐雾环境, 失效机理, 扫描电子显微镜, 电化学阻抗, 中性盐雾试验, X射线能谱仪, 钢, heat-resistant steel electrochemical corrosion failure mechanism salt spray test

中文摘要：

M152 的腐蚀失败机制用中立咸水花的测试被学习更好理解 1Cr12Ni3Mo2VN (M152 ) 的腐蚀行为，为材料选择的优化提供一个基础，并且阻止失败的出现。而且，机制用集体损失方法，极化曲线，电气化学的阻抗光谱学(EIS ) ， stereology 显微镜学，扫描电子显微镜学，和精力散的 X 光检查光谱学(版本) 被调查。结果证明 M152 钢承受严重腐蚀，特别 pitting 腐蚀，在 high-salt-spray 环境。在实验的早阶段，腐蚀产品的颜色主要是橘子。产品然后逐渐地演变为一种稠密的、棕色的物质，它与腐蚀率的减少与一致。相应地，在迟了的测试的 M152 的 EIS 光谱也展出了常数三次并且在低频率介绍了 Warburg 阻抗。

英文摘要：

The corrosion failure mechanism of M152 was studied using the neutral salt-spray test to better understand the corrosion behavior of 1Cr12Ni3Mo2VN（M152）, provide a basis for the optimization of material selection, and prevent the occurrence of failure. Moreover, the mechanism was investigated using the mass loss method, polarization curves, electrochemical impedance spectroscopy（EIS）, stereology microscopy, scanning electron microscopy, and energy-dispersive X-ray spectroscopy（EDS）. The results show that M152 steel suffers severe corrosion, especially pitting corrosion, in a high-salt-spray environment. In the early stage of the experiment, the color of the corrosion products was mainly orange. The products then gradually evolved into a dense, brown substance, which coincided with a decrease of corrosion rate. Correspondingly, the EIS spectrum of M152 in the late test also exhibited three time constants and presented Warburg impedance at low frequencies.

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