Friction stir processing of aluminium alloy AA7075: Microstructure, surface chemistry and corrosion resistance

被引：102

作者：

Pang, J. J. ^{[1
,2
]}

Liu, F. C. ^{[3
]}

Liu, J. ^{[4
]}

Tan, M. J. ^{[5
]}

Blackwood, D. J. ^{[1
]}

机构：

[1] Natl Univ Singapore, Dept Mat Sci & Engn, Block E3A,7 Engn Dr 1, Singapore 117574, Singapore

[2] Zhejiang Univ Water Resources & Elect Power, Sch Mech & Automot Engn, 583 Xuelin St,East Xiasha Higher Educ Pk, Hangzhou, Zhejiang, Peoples R China

[3] Osaka Univ, JWRI, 11-1 Mihigaoka, Osaka, Ibaraki 5670047, Japan

[4] Univ London Imperial Coll Sci Technol & Med, Dept Mech Engn, London SW7 2AZ, England

[5] Nanyang Technol Univ, Sch Mech & Aerosp Engn, 50 Nanyang Ave, Singapore 639798, Singapore

来源：

CORROSION SCIENCE | 2016年 / 106卷

关键词：

Aluminium; Alloy; Polarization; EIS; Pitting corrosion; Segregation; LASER-SCANNING MICROSCOPY; MECHANICAL-PROPERTIES; LOCALIZED CORROSION; INTERMETALLIC PHASES; BEHAVIOR; PARTICLES; METROLOGY; AL7CU2FE; HEAT;

D O I：

10.1016/j.corsci.2016.02.006

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Friction stir process (FSP) was conducted in both air and water on aluminium alloy AA7075, with the latter environment providing the smallest grain size and a higher surface copper level. In 0.5 M NaCl solution, FSP conducted in air was beneficial, reducing the corrosion rate and increasing the pitting potential. When performed in water it was detrimental, having no influence on the pitting potential but increasing the corrosion rate, due to the higher surface area coverage of Cu rich regions increasing the area available for the cathodic reaction. For long-term exposure reduced corrosion rates were observed for both FSP-treated samples. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：217 / 228

页数：12

共 46 条

[1] Corrosion behaviour of different tempers of AA7075 aluminium alloy
Andreatta, F
Terryn, H
de Wit, JHW
[J]. ELECTROCHIMICA ACTA, 2004, 49 (17-18) : 2851 - 2862
[2] Electrochemical characterisation of aluminium AA7075-T6 and solution heat treated AA7075 using a micro-capillary cell
Andreatta, F
Lohrengel, MM
Terryn, H
de Wit, JHW
[J]. ELECTROCHIMICA ACTA, 2003, 48 (20-22) : 3239 - 3247
[3] [Anonymous], FUNDAMENTALS ELECTRO
[4] [Anonymous], HDB MONOCHROMATIC XP
[5] [Anonymous], MAT SCI FORUM
[6] Electrochemical characteristics of intermetallic phases in aluminum alloys - An experimental survey and discussion
Birbilis, N
Buchheit, RG
[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2005, 152 (04) : B140 - B151
[7] Electrochemical behavior and localized corrosion associated with Al7Cu2Fe particles in aluminum alloy 7075-T651
Birbilis, N.
Cavanaugh, M. K.
Buchheit, R. G.
[J]. CORROSION SCIENCE, 2006, 48 (12) : 4202 - 4215
[8] Blackwood DJ, 1998, BRIT CORROS J, V33, P219, DOI 10.1179/000705998798115461
[9] Influence of the space-charge region on electrochemical impedance measurements on passive oxide films on titanium
Blackwood, DJ
[J]. ELECTROCHIMICA ACTA, 2000, 46 (04) : 563 - 569
[10] Borg R.J., 2012, An Introduction to Solid State Diffusion

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