Microstructure and formation mechanism of cerium conversion coating on alumina borate whisker-reinforced AA6061 composite

被引：18

作者：

Hu, Jin ^{[1
]}

Tang, Shawei ^{[1
]}

Zhang, Zaiyang ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China

来源：

CORROSION SCIENCE | 2008年 / 50卷 / 11期

关键词：

Metal matrix composite; SEM; TEM; Passive film;

D O I：

10.1016/j.corsci.2008.08.020

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Cerium conversion coatings, formed on alumina borate whisker-reinforced aluminum composite with pre-treatment for different time. were characterized by SEM/EDX, TEM and electrochemical method. The structure and formation mechanism of the coatings were investigated in detail. It was found that the pre-treatment prior to coatings has strong influence on formation, growth and morphology as well as granular size of coatings. Two typical coating morphologies existed at the pre-treated substrate surfaces. Cracks only presented on thick coatings because of the higher deposition rate and the greater inner stress. Cracks preferably produced at the whisker/matrix interface and the grain boundary of matrix. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：3185 / 3192

页数：8

共 26 条

[1] Advanced generation of green conversion coatings for aluminium alloys [J].

Bethencourt, M ;

Botana, FJ ;

Cano, MJ ;

Marcos, M .

APPLIED SURFACE SCIENCE, 2004, 238 (1-4) :278-281

[2] Effect of HCl pre-treatment on corrosion resistance of cerium-based conversion coatings on magnesium and magnesium alloys [J].

Brunelli, K ;

Dabalà, M ;

Calliari, I ;

Magrini, M .

CORROSION SCIENCE, 2005, 47 (04) :989-1000

[3] Corrosion protection of an Al 6092/SiCp metal matrix composite [J].

Chen, C ;

Mansfeld, F .

CORROSION SCIENCE, 1997, 39 (06) :1075-1082

[4] Effect of surface pretreatment by acid pickling on the density of stannate conversion coatings formed on AZ91 D magnesium alloy [J].

Elsentriecy, Hassan H. ;

Azumi, Kazuhisa ;

Konno, Hidetaka .

SURFACE & COATINGS TECHNOLOGY, 2007, 202 (03) :532-537

[5] Improvement in stannate chemical conversion coatings on AZ91 D magnesium alloy using the potentiostatic technique [J].

Elsentriecy, Hassan H. ;

Azumi, Kazuhisa ;

Konno, Hidetaka .

ELECTROCHIMICA ACTA, 2007, 53 (02) :1006-1012

[6] Characterization of cerium-based conversion coatings for corrosion protection of aluminum alloys [J].

Fahrenholtz, WG ;

O'Keefe, MJ ;

Zhou, HF ;

Grant, JT .

SURFACE & COATINGS TECHNOLOGY, 2002, 155 (2-3) :208-213

[7] Corrosion protection of aluminum metal-matrix composites [J].

Greene, HJ ;

Mansfeld, F .

CORROSION, 1997, 53 (12) :920-927

[8] Corrosion protection of aluminium metal-matrix composites by cerium conversion coatings [J].

Hamdy, AS ;

Beccaria, AM ;

Traverso, P .

SURFACE AND INTERFACE ANALYSIS, 2002, 34 (01) :171-175

[9] CORROSION INHIBITION WITH RARE-EARTH-METAL SALTS [J].

HINTON, BRW .

JOURNAL OF ALLOYS AND COMPOUNDS, 1992, 180 :15-25

[10]

HINTON BRW, 1984, MET FORUM, V7, P211

← 1 2 3 →