采用超音速微粒沉积技术在5083铝合金表面制备γ-TiAl基Ti-45Al-7Nb-2V-2Cr合金耐蚀防护涂层，实现γ-TiAl基涂层的原态制备，并对涂层微观结构及电化学性能进行研究。结果表明：在涂层中的Al、V元素富集区，喷涂颗粒发生显著的塑性变形，有利于TiAl合金颗粒的沉积成形；通过在5083铝合金表面制备TiAl合金防护涂层可使其与TA2钛合金的接触腐蚀电流由16.2μA降为0.191μA，接触腐蚀敏感性由E级降到A级，喷涂件可与TA2钛合金直接接触使用，解决了铝合金与钛合金的接触腐蚀防护问题。%Ti-45Al-7Nb-2V-2Cr anti-corrosion protecting coatings based onγ-TiAl phase were prepared on the surface of 5083 aluminum alloy by supersonic particles deposition technology, which process achieved the in situ preparation ofγ-TiAl-based coatings. The micro-structure and electrochemical performance of coatings were investigated. The results indicate that the spraying particles generate more dramatic plastic deformation at the enrichment zones of both Al and V elements, which favors sedimentation and forming of TiAl powders. Meanwhile, the galvanic corrosion current between 5083 aluminium alloy and TA2 titanium alloy declines from 16.2μA to 0.191μA after TiAl protecting coatings prepared on the substrates, besides, the corrosion susceptibility drops from E degree to A degree. It also manifests that the 5083 aluminium alloy with Ti-45Al-7Nb-2V-2Cr anti-corrosion protecting coatings can be contacted and utilized with TA2 titanium alloy directly, which tackles the issues of gavanic corrosion prevention between Al alloys and Ti alloys.
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