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The structure and performances of the electroless Ni-P alloy coating on aluminum alloy

SUN Cong-zheng1；GUAN Cong-sheng1；QIN Jing-yu2；CHENG Chuan2   

  1. 1. College of Chemistry and Chemical Engineering，Shandong University，Jinan 250061，China；2. College of Materials Science and Engineering，Shandong University，Jinan 250061，China
  • Received:2006-10-31 Revised:1900-01-01 Online:2007-10-24 Published:2007-10-24
  • Contact: SUN Cong-zheng

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Abstract: Ni-P electroless coating on aluminum alloy was plated by a double solution system of alkaline and acidic solutions, which was designed for proton exchange membrane fuel cell(PEMFC) bipolar plates. The content of the nickel and phosphorus in the coating was tested by the electron probe method, the influence of temperature and time of heat treatment on the crystallization structure by the X diffraction method, and corrosion resistance by the volt-ampere curve method. The experimental results show that heat treatment can obviously affect the crystallization structure and the corrosion resistance of the coating. The Ni-P coating with a P content of 12.1 %(wt) does not obviously crystallize after being treated with 200～250℃, while its corrosion resistance apparently improves. It can be used as PEMFCs' bipolar plates.

Key words: Ni-P alloy coating, performance , aluminum alloy

CLC Number: 

  • TG113.12
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