用化学镀镍法在Ｇｒ/Ａｌ复合材料表面沉积了Ｎｉ－Ｐ合金，研究其沉积特性及耐蚀性。结果表明，Ｇｒ/Ａｌ复合材料表面化学镀镍具有其特殊性：在前处理的活性质点形核时，基体铝合金从浸Ｚｎ溶液中置换出催化活性的Ｎｉ核；增强体石墨纤维可以吸附一定数量的Ｎｉ核，随后的化学镀镍时Ｎｉ－Ｐ合金就会在Ｇｒ/Ａｌ复合材料表面均匀沉积。表面化学镀镍通过阻挡腐蚀原电池反应中电偶腐蚀的导电路径以及形成非晶态的镀层结构，显著地提高了Ｇｒ/Ａｌ复合材料的耐蚀性，延长了使用寿命。
The deposition characteristic of electroless plating Ni-P on Gr/Al composite surface and coatings corrosion resistance are investigated for the particularity of Gr/Al composite surface in this paper. During forming nucleus of action points, chemical displacement reaction is taking place in the dipping zinc solution on the Al substrate, but nucleus of action points are adorpted on the reinforcement graphite fibers surface, because Al is part of the second surface and graphite is part of the third surface. After formation nucleus for depositing nickel, Ni-P alloys would deposit on the Gr/Al composite surface. It is result that Ni-P coating blocked off the circuit for the electrochemical reaction in galvanic couples, and the non-crystal coatings had not sensitive grains boundary for the corrosion reaction, the corrosion resistance was improved by Ni-P coating.
参考文献
| [1] |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%