A novel dual nickel coating on AZ91D magnesium alloy |
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| Authors: | SONG Ying-wei SHAN Da-yong CHEN Rong-shi HAN En-hou State Key Laboratory for Corrosion Protection |
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| Affiliation: | SONG Ying-wei,SHAN Da-yong,CHEN Rong-shi,HAN En-hou State Key Laboratory for Corrosion , Protection,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China |
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| Abstract: | Magnesium alloys covered with metal coating display excellent corrosion resistance,wear resistance,conductivity and electromagnetic shielding properties.The electroless plating Ni-P as boRom layer following the electroplating nickel as surface layer on AZ91D magnesium alloy was investigated.The coating surface morphology was observed with SEM and the structure was analyzed with XRD.Electrochemical tests and salt spray tests were carried out to study the corrosion resistance.The experimental results indicate that the dual coating is uniform,compact and pore-free.The adhesion strength between magnesium alloy substrate and electroless plating Ni-P bottom layer and electroplating nickel surface layer is perfect.The corrosion resistance of AZ91D magnesium alloy is greatly improved after being protected with the dual coating. |
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| Keywords: | AZ91D magnesium alloy dual coating electroplating Ni electroless plating Ni-P:corrosion resistance |
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