Protection against corrosion in marine environments of AA6060 aluminium alloy by cerium chlorides

被引：66

作者：

Allachi, H. ^{[1
]}

Chaouket, F. ^{[1
]}

Draoui, K. ^{[1
]}

机构：

[1] Univ Abdel Malek Essaadi, Fac Sci, Lab Phys Chim Interfaces & Environm, Tetouan 93000, Morocco

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 491卷 / 1-2期

关键词：

Aluminium alloy; Corrosion; Inhibition; Cerium; NaCl; Electrochemical techniques; AA5083; AL-MG; RARE-EARTH CHLORIDES; LANTHANIDE SALTS; NACL SOLUTIONS; ELECTROCHEMICAL-BEHAVIOR; OXIDE-FILMS; INHIBITION; INTERMETALLICS; MEDIA; STEEL;

D O I：

10.1016/j.jallcom.2009.11.042

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Lanthanide salts are being considered as an environmentally friendly alternative to the classic systems based on chromates. The addition of small concentrations of cerium chloride to aerated aqueous 3.5% NaCl solution inhibits uniform and pitting corrosion processes of AA6060. Full immersion tests combined with different electrochemical techniques were involved to determine the protection degree and the inhibition character supplied by the cerium ion. Their microscopic and compositional features have been analyzed using SEM and EDS spectra. The results obtained show that the protective layer has heterogeneous composition. An alumina layer covers the aluminium matrix while dispersed cerium-rich islands deposited over the cathodic sites of the alloy. In the case of AA6060, alpha-Al(Fe,Mn)Si acts as permanent cathodic sites. (c) 2009 Elsevier B.V. All rights reserved.

引用

页码：223 / 229

页数：7

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