Corrosion and wear of PEO coated AZ91/SiC composites

被引：57

作者：

Mingo, B. ^{[1
]}

Arrabal, R. ^{[1
]}

Mohedano, M. ^{[1
]}

Pardo, A. ^{[1
]}

Matykina, E. ^{[1
]}

机构：

[1] Univ Complutense, Fac Ciencias Quim, Dept Ciencia Mat, E-28040 Madrid, Spain

来源：

SURFACE & COATINGS TECHNOLOGY | 2017年 / 309卷

关键词：

Magnesium composite; Corrosion; Wear; SKPFM; PLASMA ELECTROLYTIC OXIDATION; MAGNESIUM ALLOYS; BEHAVIOR; RESISTANCE; MICROSTRUCTURE; COATINGS; AZ91D; MG; AL; PARTICLES;

D O I：

10.1016/j.surfcoat.2016.10.041

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this work, corrosion and wear resistance of uncoated and PEO coated AZ91/SiC/0-10p composites manufactured by semisolid processing is evaluated by corrosion tests in saline solution and ball-on-disc tests. AZ91/SiC composites show a globular microstructure with SiC clusters located at the interglobular regions. PEO coatings reveal a trilayered structure with thicker, less porous and softer regions at the locations of SiC clusters. Corrosion rate increases with increasing the volume fraction of reinforcement, which shows a cathodic activity and disrupts the continuity of the (3-phase network. PEO improves the corrosion resistance,but it is also negatively influenced by the presence of the reinforcement. Tribological tests show a positive effect of the reinforcement on uncoated materials, whereas an opposite effect is found on PEO coated materials, probably due to the detachment of SiC particles from the coating. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：1023 / 1032

页数：10

共 46 条

[1] Effects of casting temperature on the microstructure and wear resistance of compocast A356/SiCp composites:: a comparison between SS and SL routes [J].

Akhlaghi, F ;

Lajevardi, A ;

Maghanaki, HM .

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2004, 155 :1874-1880

[2] Effect of Chloride Ions in Plasma Electrolytic Oxidation of Titanium [J].

Aliasghari, S. ;

Hashimoto, T. ;

Skeldon, P. ;

Thompson, G. E. .

ECS ELECTROCHEMISTRY LETTERS, 2014, 3 (05) :C17-C20

[3]

[Anonymous], 2013, METAL MATRIX COMPOSI

[4] Characterization and wear behaviour of PEO coatings on 6082-T6 aluminium alloy with incorporated α-Al2O3 particles [J].

Arrabal, R. ;

Mohedano, M. ;

Matykina, E. ;

Pardo, A. ;

Mingo, B. ;

Merino, M. C. .

SURFACE & COATINGS TECHNOLOGY, 2015, 269 :64-73

[5] Corrosion behaviour of AZ91D and AM50 magnesium alloys with Nd and Gd additions in humid environments [J].

Arrabal, R. ;

Matykina, E. ;

Pardo, A. ;

Merino, M. C. ;

Paucar, K. ;

Mohedano, M. ;

Casajus, P. .

CORROSION SCIENCE, 2012, 55 :351-362

[6] Effect of Nd on the corrosion behaviour of AM50 and AZ91D magnesium alloys in 3.5 wt.% NaCl solution [J].

Arrabal, R. ;

Pardo, A. ;

Merino, M. C. ;

Mohedano, M. ;

Casajus, P. ;

Paucar, K. ;

Garces, G. .

CORROSION SCIENCE, 2012, 55 :301-312

[7] Corrosion behaviour of a magnesium matrix composite with a silicate plasma electrolytic oxidation coating [J].

Arrabal, R. ;

Pardo, A. ;

Merino, M. C. ;

Mohedano, M. ;

Casajus, P. ;

Matykina, E. ;

Skeldon, P. ;

Thompson, G. E. .

CORROSION SCIENCE, 2010, 52 (11) :3738-3749

[8] Characterization of AC PEO coatings on magnesium alloys [J].

Arrabal, R. ;

Matykina, E. ;

Hashimoto, T. ;

Skeldon, P. ;

Thompson, G. E. .

SURFACE & COATINGS TECHNOLOGY, 2009, 203 (16) :2207-2220

[9] Coating formation by plasma electrolytic oxidation on ZC71/SiC/12p-T6 magnesium metal matrix composite [J].

Arrabal, R. ;

Matykina, E. ;

Skeldon, P. ;

Thompson, G. E. .

APPLIED SURFACE SCIENCE, 2009, 255 (09) :5071-5078

[10]

Chawla N, 2001, ADV ENG MATER, V3, P357, DOI 10.1002/1527-2648(200106)3:6<357::AID-ADEM357>3.0.CO

← 1 2 3 4 5 →