| SONG Xin-qiang,ZHANG Ji-fu,LI Chao-xing,CHEN He-xing,YU Zhi-ming.Investigation on Preparation of Aluminium / MAO Composite Coatings by LT-HVOF and MAO and It ' s Properties[J],42(4):39-42,46 |
| Investigation on Preparation of Aluminium / MAO Composite Coatings by LT-HVOF and MAO and It ' s Properties |
| Received:February 23, 2013 Revised:March 25, 2013 |
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| DOI： |
| KeyWord:AZ91 D magnesium alloy HVOF Al coatings MAO corrosion resistance |
| Author | Institution |
| SONG Xin-qiang |
School of Material Science and Engineering, Central South University, Changsha , China;Guangzhou Research Institute of Non-ferrous Metal, Guangzhou , China |
| ZHANG Ji-fu |
Guangzhou Research Institute of Non-ferrous Metal, Guangzhou , China |
| LI Chao-xing |
Guangzhou Research Institute of Non-ferrous Metal, Guangzhou , China |
| CHEN He-xing |
Guangzhou Research Institute of Non-ferrous Metal, Guangzhou , China |
| YU Zhi-ming |
School of Material Science and Engineering, Central South University, Changsha , China |
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| Abstract: |
| The density Al coatings were prepared on AZ91 D magnesium alloys by low temperature high velocity oxygen fuel ( LT-HVOF) , and which was post-treatment by micro-arc oxidation, then the Al / Al2O3composite coatings were acquired.And the film forming process, microstructure and composite, corrosion resistance of the oxidation film, were analyzed by SEM,XRD and Neutral Salt Spray Test ( NSST) and contrasted with the MAO films of the 2024 aluminium alloys and AZ91 D magnesium alloys. As a result, the morphology of the MAO film on Al coatings is porous and coral like with no micro-crack,and its MAO process is the same like 2024 Al alloy 's. And the main phase composition of the MAO films on the Mg / Al composition coatings is γ-Al2O3. The MAO films on the Al coatings have excellent corrosion resistance of artificial seawater and which could markedly improve the anti-corrosion property of the magnesium alloys. |
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