Anodisation of AZ91D magnesium alloy in molybdate solution for corrosion protection

被引：40

作者：

Lopez, A. D. Forero ^{[1
]}

Lehr, I. L. ^{[1
]}

Saidman, S. B. ^{[1
]}

机构：

[1] Univ KwaZulu Natal, Dept Chem Engn, INIEC, Av. Alem 1253, 8000 Bahia Blanca, Buenos Aires, Argentina

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 702卷

关键词：

Magnesium alloy; Corrosion resistance; Anodisation; Molybdate; ANODIC-DISSOLUTION; STAINLESS-STEELS; AQUEOUS-SOLUTION; MOLYBDENUM; BEHAVIOR; PERFORMANCE; CONVERSION; COATINGS; CHLORIDE; FILMS;

D O I：

10.1016/j.jallcom.2017.01.030

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：

We report the formation of a protective film on magnesium alloy AZ91D by means of anodisation under potentiostatic conditions in a molybdate solution. Results of the characterisation of the films by scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) are presented. The anodic film is mainly composed by magnesium oxides or hydroxides and molybdenum oxides. The corrosion protection performance of the coating was investigated in Ringer solution by monitoring the open circuit potential, polarisation techniques and electrochemical impedance spectroscopy (EIS). The coated electrodes exhibit significant corrosion protection properties due to the presence of molybdenum species in the film. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：338 / 345

页数：8

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