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Zr-8.8Al合金化学镀前磷化处理工艺研究
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河北科技大学

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TG174.4

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国家973项目(2010CB731604)和河北科技大学杰出青年基金项目


Phosphating pre-plating process for electro-less plating on Zr-8.8Al alloy
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Hebei University of Science and Technology

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    摘要:

    前处理工艺的选择直接决定了化学镀Ni-P镀层质量的高低。本文采用磷化法对Zr-8.8Al合金进行了化学镀前处理,研究了Zr-8.8Al合金在不同磷化工艺获得的磷化膜以及化学镀Ni-P镀层显微结构、显微硬度、抗蚀性等的影响规律。结果表明,45℃下2min获得的磷化膜均匀致密;在此工艺下进行化学镀处理获得的Ni-P镀层为非晶结构,胞状结构,厚度达25μm。与裸材相比,Ni-P镀层显微硬度提高了60%,在3.5wt%NaCl溶液中自腐蚀电位发生正移,极化腐蚀后镀层胞状较完整,对Zr-8.8Al合金起到了较好的保护作用。

    Abstract:

    The quality of electro-less Ni-P plating is dependent on the process of pretreatment. In this paper, phosphating pretreatment was preformed for electro-less Ni-P plating on Zr-8.8Al alloy. The effect of phosphating process on the microstructure, microhardness and corrosion resistance in 3.5 wt% NaCl solution of electro-less Ni-P plating was investigated. The results show that the phosphating film obtained at 45℃ for 2min was uniform and even. The electro-less Ni-P plating has amorphous cellular structure and was about 25μm thickness. Compared with that of nonplated alloy, the microhardness of electroless Ni-P plating after phosphating pretreatment was improved by 60 percent. The corrosion potential of electro-less Ni-P plating after phosphating pretreatment in 3.5 wt% NaCl solution shift positively. The plating after corrosion is still complete, which shows that the corrosion resistance of electroless Ni-P plating after phosphating pretreatment is excellent.

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马静. Zr-8.8Al合金化学镀前磷化处理工艺研究[J].稀有金属材料与工程,2016,45(1):159~164.[majing. Phosphating pre-plating process for electro-less plating on Zr-8.8Al alloy[J]. Rare Metal Materials and Engineering,2016,45(1):159~164.]
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历史
  • 收稿日期:2014-02-21
  • 最后修改日期:2014-07-18
  • 录用日期:2014-09-28
  • 在线发布日期: 2019-01-04
  • 出版日期: