Effect of treatment time and temperature on microstructure and corrosion behavior of Zn-Ni electrophosphate coating

被引：11

作者：

Darband, Ghasem Barati ^{[1
]}

Afshar, Abdollah ^{[1
]}

Rabani, Majid ^{[2
]}

机构：

[1] Sharif Univ Technol, Dept Mat Sci & Engn, Tehran, Iran

[2] Esfarayen Univ Technol, Esfarayen, Iran

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2016年 / 688卷

关键词：

Electrophosphating; Zn-Ni; SEM; Polarization; EIS; CATHODIC ELECTROCHEMICAL TREATMENT; PHOSPHATE COMPOSITE COATINGS; ZINC PHOSPHATE; GALVANIZED STEEL; RESISTANCE; ALLOY; PRETREATMENT; PERFORMANCE; DEPOSITION; ADDITIVES;

D O I：

10.1016/j.jallcom.2016.07.032

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this study, the effect of phosphating time and temperature on microstructure and corrosion behavior of Zn-Ni electrophosphate coating with a galvanized steel as a substrate, were investigated. SEM and Xray diffraction methods were used for investigation the microstructure and phase analysis, respectively. And immersion test, potentiodynamic polarization test, and Electrochemical Impedance Spectroscopy tests were used for the study of corrosion behavior. The results of this study indicated that the best coating morphology is obtained in the range between 20 and 30 min and 40-50 degrees C. Moreover, results of corrosion studies showed that the corrosion mechanism is under diffusion control due to the formation of zinc base corrosion products. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：596 / 604

页数：9

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