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| Influence of Micro-Arc Oxidation Treatment on the Corrosion Behavior of AZ91D Magnesium Alloy |
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| 山东青岛南海路7号中科院海洋所腐蚀室 |
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Abstract To investigate the influence of micro-arc oxidation (MAO) treatment,a layer of ceramic coating was prepared on AZ91D magnesium alloy by using MAO technique in alkali-silicate solution.The corrosion resistance of MAO treated and untreated AZ91D magnesium alloy was studied in 3.5mass% NaCl solution by means of the electrochemical impedance spectroscopy (EIS) method.During the immersion process,both specimens exhibited two kinds of impedance diagrams,two capacitive loops at the initial stage and one capacitive with one inductive loop at the later stage.Compared with the untreated magnesium alloy,the MAO treated specimen exhibited positive corrosion potential and increased resistance.Both the corrosion potential and the resistance of the MAO treated specimen fluctuated at the initial stage of immersion,afterwards decreased.A two-stage deterioration mechanism,the MAO coating deterioration and the Mg alloy localized corrosion,was proposed to describe the corrosion process of the MAO treated Mg alloy.
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Received: 08 June 2005
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[1]Mordike B L,Ebert T.Magnesium properties-applications-po-tential[J].Mater.Sci.Eng.,2001,A302:37-45
[2]Hoche H,Scheerer H,Probst D,et al.Plasma anodisation as an en-vironmental harmless method for the corrosion protection of magne-sium alloys[J].Surf.Coat.Technol.,2003,174-175:1002-1007
[3]Hoche H,Scheerer H,Probst D,et al.Development of a plasma sur-face treatment for magnesium alloys to ensure sufficient wear andcorrosion resistance[J].Surf.Coat.Technol.,2003,174-175:1018-1023
[4]Gray J E,Luan B.Protective coatings on magnesium and its alloys-a critical review[J].J.Alloys and Compounds,2002,336:88-113
[5]Wei Z L,Chen Q R,Guo X C,et al.Microstructure and corrosionresistance of ceramic coating on magnesium alloy[J].Mater.Prot.,2003,36(10):21-23(卫中领,陈秋荣,郭歆聪等.镁合金微弧氧化膜的微观结构及耐蚀性研究[J].材料保护,2003,36(10):21-23)
[6]Yerokhin A L,Shatrov A,Samsonov V,et al.Fatigue properties ofkeronite coatings on a magnesium alloy[J].Surf.Coat.Technol.,2004,182(1):78-84
[7]Liu Y G,Zhang W,Li J Q,et al.Study on the structure and corro-sion resistance of ceramic coating on magnesium alloy[J].Mater.Prot.,2004,37(1):17-18,22(刘元刚,张巍,李久青等.镁合金微弧氧化膜结构及耐蚀性的初步研究[J].材料保护,2004,37(1):17-18,22)
[8]Zhang Y,Yan C,Wang F,et al.Study on the environmentallyfriendly anodizing of AZ91D magnesium alloy[J].Surf.Coat.Tech-nol.,2002,161(1):36-43
[9]Ma Y,Nie X,Northwood D O,et al.Corrosion and erosion proper-ties of silicate and phosphate coatings on magnesium[J].Thin SolidFilms,2004,469-470:472-477
[10]Shi Z,Song G,Atrens A.Influence of theβphase on the corrosionperformance of anodised coatings on magnesium-aluminium alloys[J].Corros.Sci.,2005,47(11):2760-2777
[11]Guo H F,An M Z.Growth of ceramic coatings on AZ91D magne-sium alloys by micro-arc oxidation in aluminate-fluoride solutionsand evaluation of corrosion resistance[J].Applied Surface Science,2005,246(1-3):229-238
[12]Mathieu S,Rapin C,Hazan J,et al.Corrosion behavior of highpressure die-cast and semi-solid cast AZ91D alloys[J].Corros.Sci.,2002,44(12):2737-2756
[13]Wang Y,Wang J,Zhang J,et al.Characteristics of anodic coatingsoxidized to different voltage on AZ91D Mg alloy by micro-arc ox-idization technique[J].Mater.Corros.,2005,56(2):88-92 |
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