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首页> 美国卫生研究院文献>Nanoscale Research Letters >Deposition Process and Properties of Electroless Ni-P-Al2O3 Composite Coatings on Magnesium Alloy
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Deposition Process and Properties of Electroless Ni-P-Al2O3 Composite Coatings on Magnesium Alloy

机译：镁合金上化学镀Ni-P-Al2O3复合镀层的沉积工艺及性能

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摘要

To improve the corrosion resistance and wear resistance of electroless nickel-phosphorus (Ni-P) coating on magnesium (Mg) alloy. Ni-P-Al2O3 coatings were produced on Mg alloy from a composite plating bath. The optimum Al2O3 concentration was determined by the properties of plating bath and coatings. Morphology growth evolution of Ni-P-Al2O3 composite coatings at different times was observed by using a scanning electronic microscope (SEM). The results show that nano-Al2O3 particles may slow down the replacement reaction of Mg and Ni2+ in the early stage of the deposition process, but it has almost no effect on the rate of Ni-P auto-catalytic reduction process. The anti-corrosion and micro-hardness tests of coatings reveal that the Ni-P-Al2O3 composite coatings exhibit better performance compared with Ni-P coating owing to more appropriate crystal plane spacing and grain size of Ni-P-Al2O3 coatings. Thermal shock test indicates that the Al2O3 particles have no effect on the adhesion of coatings. In addition, the service life of composite plating bath is 4.2 metal turnover, suggesting it has potential application in the field of magnesium alloy.
机译：改善镁（Mg）合金上化学镀镍-磷（Ni-P）涂层的耐腐蚀性和耐磨性。 Ni-P-Al2O3涂层是通过复合镀浴在Mg合金上生产的。 Al2O3的最佳浓度由镀液和涂层的性能决定。使用扫描电子显微镜（SEM）观察了Ni-P-Al2O3复合涂层在不同时间的形貌生长演变。结果表明，纳米Al2O3颗粒可以减缓沉积过程初期Mg和Ni 2 + 的置换反应，但对Ni-P auto的转化率几乎没有影响。 -催化还原过程。涂层的耐蚀性和显微硬度测试表明，与Ni-P涂层相比，Ni-P-Al2O3复合涂层表现出更好的性能，这归因于Ni-P-Al2O3涂层的晶面间距和晶粒尺寸更合适。热冲击试验表明，Al2O3颗粒对涂层的附着力没有影响。另外，复合镀液的使用寿命为4.2金属周转，表明其在镁合金领域具有潜在的应用前景。

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