کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1657414 | 1517627 | 2014 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Corrosion behavior of AZ91 Mg alloy anodized by low-energy micro-arc oxidation: Effect of aluminates and silicates
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
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چکیده انگلیسی
AZ91 Mg alloy was anodized by micro-arc oxidation under a low constant current density (10 mA cmâ 2) in an electrolytic bath containing KOH 3M + KF 0.5M + Na3PO4â
 12H2O 0.25 M. The effects of the anodizing process duration and the presence of aluminate (NaAlO2 0.2 M) or silicate (Na2SiO3â
 9H2O 0.2 M) as additives were investigated. In terms of corrosion resistance, electrochemical methods (namely, potentiodynamic scans and chronoamperometric measurements) corroborate the results of salt spray test and show that the resistance to pitting corrosion of the treated pieces is not systematically improved by a thicker anodized layer. Actually, the composition of the protective coating is the key factor: the best resistance is obtained in the presence of silicate, which plays the role of self-healing agents in corrosive conditions, whereas the incorporation of aluminate in the oxide has a very weak effect on the corrosion resistance of the treated alloy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface and Coatings Technology - Volume 251, 25 July 2014, Pages 232-238
Journal: Surface and Coatings Technology - Volume 251, 25 July 2014, Pages 232-238
نویسندگان
D. Veys-Renaux, C.-E. Barchiche, E. Rocca,