将化学转化和化学镀镍结合在一起,先对AZ91D镁合金进行化学转化处理,然后在转化膜上进行化学镀镍.并用扫描电镜(SEM)、X射线衍射技术(XRD)研究了镀层表面形貌和组织结构及处理后镁合金的耐蚀性能.结果表明：两种工艺结合得到的镀层使腐蚀电位正移0.83 V,腐蚀电流降低,有效的提高了镁合金耐腐蚀性能.
In order to enhance the anti-corrosion performance of AZ91D magnesium alloy,a composite coating cosisted of pre-phosphorization and electroless plating of nickel was investigated in detail.Firstly,the chemical conversion coating on AZ91D magnesium alloy was obtained in phosphate-permanganate solutions,and then electroless nickel plating was carried out on the conversion coatings.The surface morphology,phase constituents of the conversion coatings and the plated Ni-coatings were examined by scanning electron microscope(SEM)and X-ray diffraction(XRD).The results show that a compact,uniform Ni layer with good adhesion was deposited on AZ91D Mg alloy.The measurements of potentiodymaic polarization indicate that the anti-corrosion property of Mg alloy was improved greatly by the composite coating.
参考文献
| [1] | |
| [2] | |
| [3] | |
| [4] | |
| [5] | Gray J E,Luan B. Protective coatings on magnesium and its alloysa critical review[J]. Journal of Alloys and Compounds, 336(1-2):88 [2] 杨黎晖,李峻青,姜巍巍,等. 镁合金表面处理技术的研究进展[J]. 中国腐蚀与防护学报, 28(5):316 |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%