A novel phosphate conversion film on Mg-8.8Li alloy

被引：124

作者：

Song, Yingwei ^{[1
]}

Shan, Dayong ^{[1
]}

Chen, Rongshi ^{[1
]}

Zhang, Fan ^{[1
]}

Han, En-Hou ^{[1
]}

机构：

[1] Chinese Acad Sci, State Key Lab Corros & Protect, Inst Met Res, Shenyang 110016, Peoples R China

来源：

SURFACE & COATINGS TECHNOLOGY | 2009年 / 203卷 / 09期

关键词：

Phosphate; Conversion film; Mg-Li alloy; Corrosion resistance; AZ91 MAGNESIUM ALLOY; MG-LI ALLOY; CORROSION BEHAVIOR; COATINGS; SURFACE;

D O I：

10.1016/j.surfcoat.2008.10.004

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The super light Mg-Li alloys exhibit excellent formability due to the addition of lithium, but the corrosion resistance is deteriorated. A novel conversion film is developed to improve the corrosion resistance. The surface morphology of conversion film was observed using scanning electron microscopy (SEM). The chemical composition was analyzed by X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). The corrosion behaviors of Mg-8.8Li alloy and conversion film were investigated with electrochemical and immersion tests. The experimental results indicated that the Mg-8.8Li alloys with and without the protection of conversion film can both be used in NaOH solution safely. But the Mg-8.8Li substrate was susceptible to corrode in NaCl and Na(2)SO(4) solutions, and the conversion film can prevent them from corroding. Compared with the NaCl solution, the Na(2)SO(4) solution was a strong corrosive medium to the conversion film. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：1107 / 1113

页数：7

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