Fe20Cr溅射纳米涂层腐蚀电化学性能研究

中国腐蚀与防护学报

2003, Vol. 23

Issue (2): 84-88

研究报告

本期目录 | 过刊浏览

Fe20Cr溅射纳米涂层腐蚀电化学性能研究

李雪莉;李瑛;王福会

中科院金属所金属腐蚀与防护国家重点实验室

STUDY ON THE ELECTROCHEMICAL CORROSION BEHAVIOR OF SPUTTERED Fe-20Cr NANOCRYSTALLINE COATING

Xueli Li;Ying Li;Fuhui Wang

中科院金属所金属腐蚀与防护国家重点实验室

全文: PDF(358 KB)

摘要: 利用电化学方法与表面分析技术，考察了平面磁控溅射Fe-2 0Cr纳米涂层的腐蚀电化学性能及耐蚀机制.研究表明，尽管溅射纳米涂层钝化膜的溶解速度高于铸态合金，但其钝化趋势较强，即使在含有05 mol/L NaCl的H2SO4 溶液中仍能自钝化，而此时铸态合金的钝化趋势非常微弱，纳米涂层的耐点蚀能力也远优于铸态合金. 晶粒细化以及铬元素分布均匀性是决定溅射纳米涂层耐点蚀能力的关键因素.

关键词 ：平面磁控溅射, 纳米涂层, 自钝化, 点蚀

Abstract：The electrochemical corrosion behavior of Fe-20Cr s puttered coating has been investigated by electrochemical measurement and surfac e analysis techniques such as SEM,STM and EPMA.The sputtered coating with nanome ter grains showed the higher corrosion rate in acid solution with and without C l- even through a passive film formed on this coating automatically.On the oth er hand,the corrosion rate of Fe-20Cr cast alloy was lower and a passive film on ly formed when anodic potential was positive enough.The further research realize d that nanocrystallization,content and distribution of Cr in substrate and passi ve film were the main factors that affected the corrosion resistance of these ma terials.The sputter coating with smaller grain had a more amount of grain bounda ry where the amount of active atoms was more than that of the other area.This re sulted in the higher corrosion rate of the sputter coating.The homogenous distr ibution of Cr element in the sputter coating make it easy to form a passive film on its surface.The lower concentration of Cr in the passive film of sputter coa ting results the higher diffusion limited current density on the passive film.

Key words： sputtered nanocrystalline coating passtion passive film

收稿日期: 2001-07-04

ZTFLH:

TG174.71

通讯作者: 李雪莉

Corresponding author: Xueli Li

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引用本文:

李雪莉; 李瑛; 王福会 . Fe20Cr溅射纳米涂层腐蚀电化学性能研究[J]. 中国腐蚀与防护学报, 2003, 23(2): 84-88 .
Xueli Li, Ying Li, Fuhui Wang. STUDY ON THE ELECTROCHEMICAL CORROSION BEHAVIOR OF SPUTTERED Fe-20Cr NANOCRYSTALLINE COATING. J Chin Soc Corr Pro, 2003, 23(2): 84-88 .

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2003/V23/I2/84

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