Cerium-permanganate conversion coatings for a Zn-Co alloy

被引：20

作者：

Bikulcius, G. ^{[1
]}

Rucinskiene, A. ^{[1
]}

Sudavicius, A. ^{[1
]}

Burokas, V. ^{[1
]}

Griguceviciene, A. ^{[1
]}

机构：

[1] Inst Chem, Dept Mat & Corros Res, LT-01018 Vilnius, Lithuania

来源：

SURFACE & COATINGS TECHNOLOGY | 2008年 / 203卷 / 1-2期

关键词：

Conversion coatings; Cerium; Permanganate; Zinc alloy;

D O I：

10.1016/j.surfcoat.2008.08.041

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The present work aims at investigation of the corrosion resistance of cerium-permanganate conversion coatings (CPCC) electrolessly deposited on a Zn-Co (0.6%) alloy. For comparison, Zn-Co (0.6%) alloy with a commercial chromate treatment was also examined. CPCCs on a Zn-Co (0.6%) alloy have been studied by potentiodynamic polarization and the immersion test. The experimental results of potentiodynamic polarization and the immersion test showed that the corrosion resistance of CPCC on a Zn-Co (0.6%) alloy is close to the corrosion resistance of chromate conversion coating on Zn-Co (0.6%). The microstructure of conversion coatings was analysed by scanning electron microscopy (SEM) and the composition of conversion coatings was analysed by X-ray photoelectron spectroscopy (XPS). It has been found that the cerium-permanganate conversion coating is homogeneous as compared with the chromate coating. XPS has determined that the CPCC contains the following compounds: CeO2 (IV), Ce2O3(III) and Mn oxides and hydroxides. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：115 / 120

页数：6

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