Long-term corrosion behavior of HVOF sprayed FeCrSiBMn amorphous/nanocrystalline coating

被引：29

作者：

Qin, Yu-jiao ^{[1
]}

Wu, Yu-ping ^{[1
]}

Zhang, Jian-feng ^{[1
]}

Guo, Wen-min ^{[1
]}

Hong, Sheng ^{[1
]}

Chen, Li-yan ^{[1
]}

机构：

[1] Hohai Univ, Coll Mech & Mat, Inst Met & Protect, Nanjing 210098, Jiangsu, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2015年 / 25卷 / 04期

关键词：

HVOF spraying; coating; Fe-based amorphous/nanocrystalline; corrosion resistance; HARD CHROMIUM; METALLIC COATINGS; WEAR-RESISTANCE; CR3C2-NICR; TIN; MICROSTRUCTURE; GLASSES; PLASMA; STEEL;

D O I：

10.1016/S1003-6326(15)63709-8

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

A FeCrSiBMn amorphous/nanocrystalline coating with 700 mu m in thickness and 0.65% in porosity, was prepared by high velocity oxygen fuel (HVOF) spraying process. The long-term corrosion behavior of the FeCrSiBMn coating was evaluated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) tests in a 3.5% NaCl solution with a hard chromium coating as a reference. The FeCrSiBMn coating exhibited higher corrosion potential and lower corrosion current density than the hard chromium coating. The pore resistance (R-p) and charge transfer resistance (R-ct) of FeCrSiBMn coating were higher than those of the hard chromium coating. In addition, after immersion in the NaCl solution for 28 d, only small pores in the FeCrSiBMn coating were observed. All the results indicated that the FeCrSiBMn coating held superior corrosion resistance to the hard chromium coating. This could be attributed to the dense structure, low porosity and amorphous/nanocrystalline phases of the FeCrSiBMn coating.

引用

页码：1144 / 1150

页数：7

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