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| Study of deposition characteristic for electroless plating nickel on Gr/Al composite surface and its corrosion resistance |
| 哈尔滨工业大学材料学院 |
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Abstract 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.
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Received: 23 October 2006
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