Technology and Corrosion Resistance of Electrodeposited Zn-Fe Alloys onto Nd-Fe-B Sintered Magnets

被引：0

作者：

Li Ba ^{[1
,2
]}

Wang Chengbiao ^{[1
]}

Wang Xiangdong ^{[2
]}

Chen Xiaoping ^{[2
]}

Peng Nan ^{[2
]}

机构：

[1] China Univ Geosci, Beijing 100083, Peoples R China

[2] Cent Iron & Steel Res Inst, Beijing 100081, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2015年 / 44卷 / 01期

关键词：

Nd-Fe-B; Zn-Fe alloy coating; passivation; corrosion resistance; BEHAVIOR;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High corrosion resistance Zn-Fe alloy coatings were electroplated onto NdFeB sintered magnet from a weak acid chloride solution. The influences of the main electroplating technological parameters on Fe content in the coating were investigated to optimize the process conditions. Meanwhile, the corrosion resistance and its mechanism were investigated by NSS, SEM and electrochemical tests. The result shows that the optimized Zn-Fe alloy (Fe content 0.92%) coated NdFeB can stand for 196 h against neutral 3.5wt% NaCl salt spray without any white rust. The function of the coating for NdFeB substrate is anodic protection. The coating with dense crystal can fill intrinsic defects of NdFeB substrate and provide favorable conditions for getting compact passivation film. The better corrosion resistance is attributed to the less surface defects and high electric resistance.

引用

页码：174 / 178

页数：5

共 15 条

[1]

An Maozhong, 1998, J CHINESE SOC CORROS, V18, P45

[2] The influence of steel surface modification by electrodeposited Zn-Fe alloys on the protective behaviour of an epoxy coating [J].

Bajat, JB ;

Miskovic-Stankovic, VB ;

Kacarevic-Popovic, Z .

PROGRESS IN ORGANIC COATINGS, 2003, 47 (01) :49-54

[3] MECHANISM OF THE ELECTRODEPOSITION OF ZINC-ALLOYS CONTAINING A SMALL AMOUNT OF COBALT [J].

HIGASHI, K ;

FUKUSHIMA, H ;

URAKAWA, T ;

ADANIYA, T ;

MATSUDO, K .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1981, 128 (10) :2081-2085

[4] Determination of effective capacitance and film thickness from constant-phase-element parameters [J].

Hirschorn, Bryan ;

Orazem, Mark E. ;

Tribollet, Bernard ;

Vivier, Vincent ;

Frateur, Isabelle ;

Musiani, Marco .

ELECTROCHIMICA ACTA, 2010, 55 (21) :6218-6227

[5]

Jiang LQ, 2006, RARE METAL MAT ENG, V35, P340

[6]

Liu XY, 2012, RARE METAL MAT ENG, V41, P1875

[7] Characterization of black chromate conversion coating on the electrodeposited zinc-iron alloy [J].

Long, ZL ;

Zhou, YC ;

Xiao, L .

APPLIED SURFACE SCIENCE, 2003, 218 (1-4) :123-136

[8] EIS study on the corrosion performance of a Cr(III)-based conversion coating on zinc galvanized steel for the automotive industry [J].

Rosalbino, Francesco ;

Scavino, Giorgio ;

Mortarino, Giovanni ;

Angelini, Emma ;

Lunazzi, Giancarlo .

JOURNAL OF SOLID STATE ELECTROCHEMISTRY, 2011, 15 (04) :703-709

[9]

Shen Pinhua, 2001, ELECTROPLATING ZINC, P211

[10]

[宋振纶 Song Zhenlun], 2012, [磁性材料及器件, Journal of Magnetic Materials and Devics], V43, P1

← 1 2 →