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首页> 外文期刊>JCT >Microstructure and corrosion behavior of electroless Ni-P coatings on 6061 aluminum alloys
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Microstructure and corrosion behavior of electroless Ni-P coatings on 6061 aluminum alloys

机译：6061铝合金上化学镀Ni-P涂层的组织和腐蚀行为

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摘要

The microstructure and corrosion behavior of electroless Ni-P alloy plating on 6061 aluminum alloys substrate in an alkaline plating bath with sodium hypophosphite as reducing agent were investigated. The effects of bath temperature on the plating rate, compositions, and microstructure of the electroless Ni-P deposits were studied. The results showed that the deposition rate and the P content of the electroless Ni-P deposits increased with the rise of the bath temperature. Scanning electron microscopy (SEM) of the deposits showed nodular structure for binary deposits. X-ray diffraction patterns of all the deposits revealed a single and broad peak which indicated the amorphous structure of the deposits. Corrosion resistance of the Ni-P coatings was evaluated by potentio-dynamic polarization. The results indicated that electroless Ni-P plating could obviously improve the corrosion resistance of 6061 aluminum alloy.
机译：研究了以次磷酸钠为还原剂的6061铝合金在碱性镀液中化学镀Ni-P合金的组织和腐蚀行为。研究了浴温对化学镀Ni-P镀层的镀覆速率，组成和微观结构的影响。结果表明，化学镀Ni-P沉积物的沉积速率和P含量随着浴温的升高而增加。沉积物的扫描电子显微镜（SEM）显示二元沉积物呈结节状结构。所有沉积物的X射线衍射图谱显示出一个单一且宽的峰，表明该沉积物为非晶态结构。 Ni-P涂层的耐腐蚀性通过电位动态极化进行评估。结果表明，化学镀Ni-P可以明显提高6061铝合金的耐蚀性。

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