Corrosion protection of magnesium AZ31 alloy using poly(ether imide) [PEI] coatings prepared by the dip coating method Influence of solvent and substrate pre-treatment

被引：36

作者：

da Conceicao, Thiago F. ^{[1
]}

Scharnagl, N. ^{[2
,3
]}

Dietzel, W. ^{[1
]}

Kainer, K. U. ^{[1
]}

机构：

[1] GKSS Mat Res Ctr, D-21502 Geesthacht, Germany

[2] GKSS Forschungszentrum Geesthacht GmbH, Ctr Biomat Dev, D-14513 Teltow, Germany

[3] GKSS Forschungszentrum Geesthacht GmbH, Berlin Brandenburg Ctr Regenerat Therapies BCRT, Polymer Res Inst, D-14513 Teltow, Germany

来源：

CORROSION SCIENCE | 2011年 / 53卷 / 01期

关键词：

Magnesium; EIS; Polymer coatings; ORGANIC COATINGS; BEHAVIOR; IMPEDANCE; MECHANISM; SYSTEMS;

D O I：

10.1016/j.corsci.2010.09.040

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

In this study investigations on the protectiveness of poly(ether imide) coatings against corrosion of magnesium AZ31 alloy sheets are performed The coatings were prepared in different pre-treated substrates by the dip coating method using N'N'-dimethyl acetamide (DMAc) and N'-methyl pyrrolidone solutions The optimal performance was obtained for hydrofluoric acid treated substrates coated using DMAc solution (coating thickness 13 mu m) which showed impedances in the order of 10(7) Omega cm(2) even after more than 3300 h of exposure to a 3 5 wt % NaCl solution This high performance is associated to an acid-base interaction at the interface as observed by X-ray photoelectron spectroscopy (C) 2010 Elsevier Ltd All rights reserved

引用

页码：338 / 346

页数：9

共 34 条

[1]

The physical chemistry of organic coatings revisited - viewing coatings as a materials scientist [J].