Corrosion protection of AA2024-T3 using rare earth diphenyl phosphates

被引：80

作者：

Markley, Tracey A.

Forsyth, Maria

Hughes, Anthony E.

机构：

[1] Monash Univ, Dept Mat Engn, Clayton, Vic 3800, Australia

[2] CSIRO, Mfg & Mat Technol, Clayton, Vic 3168, Australia

来源：

ELECTROCHIMICA ACTA | 2007年 / 52卷 / 12期

基金：

澳大利亚研究理事会;

关键词：

AA2024; alloy; rare earth inhibitors; corrosion inhibition; diphenyl phosphate; Raman spectroscopy;

D O I：

10.1016/j.electacta.2006.11.028

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Existing corrosion protection technologies for aluminium alloys utilising chromates are environmentally damaging and extremely toxic. This paper presents a preliminary investigation into rare earth diphenyl phosphates as new environmentally benign corrosion inhibitors. Full immersion weight loss experiments, cyclic potentiodynamic polarisation measurements and Raman spectroscopy were used in this study. Results show cerium diphenyl phosphate (Ce(dpp)(3)) acts as a cathodic inhibitor, decreasing cathodic current density and E-corr by passivating cathodic intermetallic particles on the alloy surface. Mischmetal diphenyl phosphate (Mm(dpp)(3)) acts a mixed inhibitor, shifting E-corr to more noble values, decreasing cathodic current density, increasing the breakdown potential and suppressing pitting. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：4024 / 4031

页数：8

共 37 条

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