Passivation Behavior of Fe-Based Amorphous Coatings Prepared by High-Velocity Air/Oxygen Fuel Processes

被引：20
作者：
Ma, H. R. [1 ,2 ,3 ]
Li, J. W. [1 ,2 ]
Chang, C. T. [1 ,2 ]
Wang, X. M. [1 ,2 ]
Li, R. W. [1 ,2 ]
机构：
[1] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Magnet Mat & Devices, Ningbo 315201, Zhejiang, Peoples R China
[2] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Zhejiang Prov Key Lab Magnet Mat & Applicat Techn, Ningbo 315201, Zhejiang, Peoples R China
[3] Shanghai Univ, Lab Microstruct, Shanghai 200444, Peoples R China
来源：
JOURNAL OF THERMAL SPRAY TECHNOLOGY | 2017年 / 26卷 / 08期
基金：
中国国家自然科学基金;
关键词：
amorphous metals; coatings; corrosion; electrochemical characterization; microstructure; BULK METALLIC-GLASS; CORROSION-RESISTANCE; ELECTROCHEMICAL-BEHAVIOR; MECHANICAL-PROPERTIES; WEAR-RESISTANCE; STAINLESS-STEEL; ALLOY; FILMS; HVOF; INITIATION;
D O I：
10.1007/s11666-017-0647-1
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Corrosion resistance and passivation behavior of Fe63Cr8Mo3.5Ni5P10B4C4Si2.5 amorphous coatings prepared by the activated combustion high-velocity air fuel (AC-HVAF) and high-velocity oxygen fuel (HVOF) processes have been studied in detail by cyclic potentiodynamic polarization, electrochemical impedance spectroscopy, cathodic polarization and Mott-Schottky approach. The AC-HVAF coating shows higher corrosion resistance than the HVOF coating in 3.5 wt.% NaCl solution, as evidenced by its lower corrosion current density and passive current density. It is found that the superior corrosion resistance of the AC-HVAF coating is attributed to the enhanced formation of a dense passive film with less defective structure, higher pitting resistance and passivity stability, as well as stronger repassivity.
引用
收藏
页码：2040 / 2047
页数：8
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