Composition Distribution and Electrochemical Behavior of an Ni2Al3 Coating on Q235 Steel

被引：12

作者：

Li, Ningning ^{[1
]}

Wang, Minzhi ^{[1
]}

Zheng, Gong ^{[1
]}

Li, Yongsheng ^{[1
]}

Chen, Guang ^{[1
]}

机构：

[1] Nanjing Univ Sci & Technol, Minist Educ, Engn Res Ctr Mat Behav & Design, Nanjing 210094, Jiangsu, Peoples R China

来源：

METALS | 2016年 / 6卷 / 03期

关键词：

Ni2Al3; coating; polarization curve; electrochemical impedance spectroscopy; pitting corrosion; ALUMINIDE/NICKEL HYBRID COATINGS; 3.5-PERCENT NACL SOLUTION; CORROSION BEHAVIOR; NI3AL COATINGS; CARBON-STEEL; ALLOY-STEELS; NICKEL; OXIDATION; MICROSTRUCTURES; ENVIRONMENTS;

D O I：

10.3390/met6030058

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An Ni2Al3 coating was prepared via the electrodeposition of nickel followed by pack aluminization. Polarization curve and electrochemical impedance spectroscopy were performed to study the room temperature corrosion behavior of the coating in a 3.5 wt. % NaCl solution. The long-term impedance of the coating was also investigated after immersion for 30 days. Results show that the Ni2Al3 coating possessed lower corrosion current density (I-corr) and higher polarization resistance (R-p) than the substrate in the solution. The Bode plots of the coating showed two time constants after the long-term immersion. Pitting corrosion was found on the coating surface.

引用

页数：8

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