XU Hui,LUAN Bairui.Study on Chromium?Free and Fluorine?Free PretreatmentProcess of AZ91D Magnesium Alloy[J].Plating & Finishing,2019,(1):10-14.[doi:10.3969/j.issn.1001-3849.2019.01.003]
AZ91D镁合金表面无铬无氟前处理工艺研究
- Title:
- Study on Chromium?Free and Fluorine?Free Pretreatment Process of AZ91D Magnesium Alloy
- 分类号:
- TQ153. 12
- 文献标志码:
- A
- 摘要:
- 为环境友好、低成本地提高镁合金耐蚀性能，本文以AZ91D为基体，研究了一种基于镁合金表面直接化学镀镍的无铬、无氟前处理工艺。结果表明，以100 mL/L H3PO4、10 g/L Na2MoO4为酸洗液，20 g/L NaOH、20 g/L Na2MoO4为活化液进行处理后，在镁合金表面得到平整、均匀、致密的Ni-P合金镀层；镀层的XRD谱图中，Mg的衍射峰消失，2θ=45°附近出现一个宽化馒头峰，镀层呈现非晶态结构；镀层的耐蚀性明显提高。
- Abstract:
- In this paper, a chromium-free and fluorine-free pretreatment process for direct electroless nickel plating on the surface of AZ91D was studied in order to improve the corrosion resistance of magnesium alloys for environmental friendly and low cost purposes. Results show that a smooth, uniform and compact Ni-P alloy coating can be obtained by electroless nickel plating on magnesium alloy surface with the following pretreatment process 100 mL/L H3PO4, 10 g/L Na2MoO4 2H2O as pickling solution, 20 g/L NaOH, 20 g/L Na2MoO4 as activating solution. In the XRD spectrum, the diffraction peak of Mg is disappeared and a broad peak is appeared near 2θ= 45°, which show that the structure of the plating is amorphous. The corrosion resistance of the plating are improved obviously.
参考文献/References:
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备注/Memo
收稿日期： 2018-10-15
修回日期： 2018-11-12
基金项目： 基金项目:哈尔滨市应用技术与开发项目（2016RAXXJ043）