| Electroless nickel-plating on die cast magnesium alloy AZ91D |
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| 作者姓名： | 贾素秋 贾树胜 姚军 |
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| 作者单位： | [1]School of Materials Science and Engineering, Changchun University of Technology, Changchun 130012, China [2]Key Laboratory of Automobile Materials, Ministry of Education, Jilin University, Changchun 130025, China |
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| 摘 要： | Electroless nickel-plating on die cast magnesium alloy AZ91D was investigated. Growth of the electroless nickel-plating coating was characterized using scanning electron microscopy. Corrosion resistance of the coating was evaluated by open circuit potential and potentiodynamic polarization curves in 3.5% （mass fraction） NaC1 solution. The results show that plating deposition is initiated on the crevices and then spread onto primary a phase. The corrosion potentials for die cast magnesium alloy AZ91D and nickel-plating coating are about -1.45 V and -0.36 V （vs. SCE）, respectively. No discoloration, cracks, blisters, or peeling appear by heat-quench test. The results show that the corrosion potential of Ni-P coating is increased by 1 000 mV and corrosion resistance for die cast magnesium alloy AZ91D is improved. The adhesion between the coating and the substrate is excellent. Electroless nickel plating is a promising method to enhance magnesium alloys resistance for attacking.
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| 关 键 词： | 镁合金 化学镀镍 抗腐蚀性 极化 |
| 收稿时间： | 2007-07-15 |
| 修稿时间： | 2007-09-10 |
Electroless nickel-plating on die cast magnesium alloy AZ91D |
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| JIA Su-qiu, JIA Shu-sheng, YAO Jun.Electroless nickel-plating on die cast magnesium alloy AZ91D[J].Transactions of Nonferrous Metals Society of China,2007,17(A02):866-870. |
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| Authors: | JIA Su-qiu JIA Shu-sheng YAO Jun |
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| Abstract: | |
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| Keywords: | electroless nickel-plating die cast magnesium alloy corrosion resistance polarization |
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