Polyoxadiazole-based coating for corrosion protection of magnesium alloy

被引：38

作者：

Kannan, M. Bobby ^{[1
]}

Gomes, D. ^{[2
]}

Dietzel, W. ^{[1
]}

Abetz, V. ^{[2
]}

机构：

[1] GKSS Forschungszentrum Geesthacht GmbH, Inst Mat Res, D-21502 Geesthacht, Germany

[2] GKSS Forschungszentrum Geesthacht GmbH, Polymer Res Inst, D-21502 Geesthacht, Germany

来源：

SURFACE & COATINGS TECHNOLOGY | 2008年 / 202卷 / 19期

关键词：

polyoxadiazole; coating; corrosion; magnesium alloys;

D O I：

10.1016/j.surfcoat.2008.03.027

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this study, polyoxadiazole-based coatings were molecularly designed by attaching two different functional groups, i.e., diphenyl-ether and diphenyl-hexafluoropropane, in the main polymer chain for the purpose of low water permeability and eventually for high corrosion protection of AM50 magnesium alloy. Potentiodynamic polarisation and electrochernical impedance spectroscopy (EIS) were used to evaluate the coating performance of the two polymers. Electrochemical experiments showed that POD-6FP (poly(4,4'-diphenyl-hexafluoropropane-1,3,4-oxadiazole)) coated alloy exhibited 3-4 orders of magnitude higher corrosion resistance as compared to the POD-DPE (poly (4,4'-diphenyl-ether-1,3,4-oxadiazole)) coated alloy. The high coating performance of the POD-6FP polymer can be attributed to the hydrophobic group attached to the polyoxadiazole chain. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：4598 / 4601

页数：4

共 25 条

[1]

BUCHARSKY EC, 2000, J CORROS SCI ENG, V2, P1

[2] Surface modification of polytetrafluoroethylene for adhesive bonding [J].

David, E ;

Lazar, A ;

Armeanu, A .

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2004, 157 :284-289

[3] General and localized corrosion of magnesium alloys: A critical review [J].

Ghali, E ;

Dietzel, W ;

Kainer, KU .

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE, 2004, 13 (01) :7-23

[4] Study of the synthesis of poly(4,4′-diphenylether-1,3,4-oxadiazole) in solutions of poly(phosphoric acid) [J].

Gomes, D ;

Borges, CP ;

Pinto, JC .

POLYMER, 2001, 42 (03) :851-865

[5] Effects of reaction variables on the reproducibility of the syntheses of poly-1,3,4-oxadiazole [J].

Gomes, D ;

Borges, C ;

Pinto, JC .

POLYMER, 2004, 45 (15) :4997-5004

[6] Determination of hydrazide content in poly(oxadiazole-hydrazide) copolymers by NMR and thermal analysis [J].

Gomes, D ;

Pinto, JC ;

Borges, C .

POLYMER, 2003, 44 (20) :6223-6233

[7]

Gomes D., 2008, J MEMBR SCI

[8] Characterization of partially sulfonated polyoxadiazoles and oxadiazole-triazole copolymers [J].

Gomes, Dominique ;

Roeder, Jerusa ;

Ponce, Mariela L. ;

Nunes, Suzana P. .

JOURNAL OF MEMBRANE SCIENCE, 2007, 295 (1-2) :121-129

[9] Protective coatings on magnesium and its alloys - a critical review [J].

Gray, JE ;

Luan, B .

JOURNAL OF ALLOYS AND COMPOUNDS, 2002, 336 (1-2) :88-113

[10]

Janietz S, 2002, MACROMOL CHEM PHYSIC, V203, P433, DOI 10.1002/1521-3935(20020101)203:2<433::AID-MACP433>3.0.CO

← 1 2 3 →