Study On The Growth And Corrosion Resistance Of Manganese Phosphate Coatings On 25Cr2Ni4WA Alloy Steel

被引：3
|
作者：
Hu, J. [1 ,2 ]
Fang, L. [1 ,2 ]
Mao, J. H. [1 ,2 ]
Xie, L. B. [1 ,2 ]
He, J. [1 ,2 ]
Zhang, P. [2 ]
机构：
[1] Chongqing Univ, Dept Appl Phys, Chongqing 400044, Peoples R China
[2] Chongqing Univ, Educ Minist China, Key Lab Optoelect Technol & Syst, Chongqing 400044, Peoples R China
来源：
ADVANCED STRUCTURAL AND FUNCTIONAL MATERIALS FOR PROTECTION | 2012年 / 185卷
关键词：
Manganese phosphate coating; 25Cr2Ni4WA alloy steel; Corrosion resistance; Phosphating mechanism;
D O I：
10.4028/www.scientific.net/SSP.185.73
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The growth process and corrosion resistance of the phosphate coating on 25Cr2Ni4WA alloy steel fabricated by a high temperature manganese phosphating were investigated by XRD, SEM, EDS and electrochemical polarization method, respectively. It is found that the phosphate coating consists of lots of close packed lump crystallites and mainly composed of (Mn,Fe)(5)H-2(PO4)(4)center dot 4H(2)O. The coating weight increased rapidly, and then the increase rate slowed down when phosphating process was carried for about 5 min. The corrosion potentials of the phosphated steel shifted positively about 250 mV than the bare steel, indicating that the phosphating can improve the corrosion resistance of the 25Cr2Ni4WA alloy steel.
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页码：73 / +
页数：2
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