Electrochemical Corrosive Behaviors of Fe-Based Amorphous/Nanocrystalline Coating on Stainless Steel Prepared by HVOF-Sprayed

被引：22
作者：
Zhang, Jifu [1 ]
Deng, Chunming [1 ,2 ]
Song, Jinbing [1 ,3 ]
Deng, Changguang [1 ,3 ]
Liu, Min [2 ]
Dai, Mingjiang [1 ]
机构：
[1] Guangdong Inst New Mat, Guangzhou 510650, Guangdong, Peoples R China
[2] Key Lab Guangdong Modern Surface Engn Technol, Guangzhou 510650, Guangdong, Peoples R China
[3] Natl Engn Lab Modern Mat Surface Engn Technol, Guangzhou 510650, Guangdong, Peoples R China
来源：
COATINGS | 2019年 / 9卷 / 04期
基金：
国家重点研发计划;
关键词：
amorphous; nanocrystalline coating; electrochemical corrosion; passive film; EIS; corrosion experiments; BULK GLASSY ALLOYS; PITTING CORROSION; WEAR-RESISTANCE; MO; CR; MICROSTRUCTURE; CHLORIDE; PH; MOLYBDENUM; POROSITY;
D O I：
10.3390/coatings9040226
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study, FeCrMnWMoSi amorphous/nanocrystalline coating was prepared on stainless steel by high-velocity oxygen fuel (HVOF) spraying. In order to thoroughly evaluate this novel material, the corrosion behaviors and corrosive film characteristics of the amorphous/nanocrystalline coating in NaCl corrosive media were studied using electrochemical measurement technologies such as potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS). It was found that the corrosion resistance of Fe-based amorphous/nanocrystalline coating could be attributed to the passive film formed, which consisted of Fe, Cr, Mo, and W oxides. pH has an important influence on the corrosion resistance of amorphous/nanocrystalline coating by changing the pitting corrosion mechanism. Under neutral and acidic conditions, the corrosion mechanism of Fe-based amorphous/nanocrystalline coating was mainly local pitting corrosion. However, under strong alkaline conditions, the amorphous/nanocrystalline coating not only had pitting corrosion, but also had the active dissolution of the passive film. Therefore, the anti-corrosion performance of Fe-based amorphous/nanocrystalline coating under alkaline conditions was not as good as neutral and acidic corrosive medium.
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页数：15
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