Anodic oxidation and sol-gel coatings for corrosion and wear protection of AM60B alloy

被引：18

作者：

Bestetti, M. ^{[1
]}

Da Forno, A. ^{[1
]}

Cavallotti, P. L. ^{[1
]}

Gronchi, P. ^{[1
]}

Barlassina, F. ^{[2
]}

机构：

[1] Politecn Milan, Dipartimento Chim Mat & Ingn Chim, I-20131 Milan, Italy

[2] RtmBreda Srl, I-20032 Cormano, MI, Italy

来源：

TRANSACTIONS OF THE INSTITUTE OF METAL FINISHING | 2010年 / 88卷 / 01期

关键词：

Magnesium alloys; Anodic oxidation; Sol-gel coatings; Corrosion; Wear; MAGNESIUM ALLOYS; FILMS; METALS;

D O I：

10.1179/174591909X12596814696567

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Institute of Metal Finishing In this paper a study on the corrosion and wear protection of AM60B magnesium alloy, by means of multilayer coating, is described. The coating mainly consists of a porous oxide layer MgO, produced by oxidation in microarc regime, and a single or multilayer top coat of SiO(x) produced by sol-gel technique and deposited by either a dip or spray coating method. The anodic oxidation pretreatment improves the adhesion of the sol-gel layers, which seal the porosity of MgO and improve corrosion protection. Furthermore, the multilayer coating significantly improves AM60B wear resistance. Scanning electron microscopy and radiofrequency glow discharge optical emission spectroscopy were used to assess surface morphologies and in depth elemental profiles of the coatings. Electrochemical polarisation tests and wear tests were performed to evaluate the corrosion resistance behaviour and the wear resistance of the coated magnesium alloys.

引用

页码：57 / 62

页数：6

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