In order to improve the corrosion resistance of the friction stir welding (FSW), the Al coating was prepared on the 2219 aluminum alloy friction stir welding joint via cold spraying technology. The structure and corrosion resistance of the Al coating were characterized by digital microscope, scanning electron microscope and electrochemical workstation. The results indicate that Al coating deposited by cold spraying technology on the FSW joint is a compact structure, and the porosity is 0.77%. There are equiaxed crystals, refined grains and elongated grains in the coating. The interface of the coating is mainly mechanical occlusion. The interface quality of the coating/joint area is obviously better than that of the coating/BM. Coating corrosion sensitivity is lower than that of FSW joints, and the corrosion potential and corrosion current density of the coating are far below the heat affected zone. Cold spray coating reduces the corrosion sensitivity of FSW joints. The intergranular corrosion test shows that the corrosion resistance of the coating is better than that of the FSW joint. In terms of corrosion depth, the coating is only 50% of HAZ after 6 h’s corrosion. The cold spray technology prominently improves the corrosion resistance of the FSW joint.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Structure and corrosion resistance of cold spray coating prepared on friction stir welded high strength aluminum alloys


    Beteiligte:
    ZHAO Changyu (Autor:in) / YANG Ruisheng (Autor:in) / ZHANG Hua (Autor:in) / GUO Qilong (Autor:in) / SHAO Tongge (Autor:in) / LIU Guanri (Autor:in)


    Erscheinungsdatum :

    2020




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Unbekannt





    Yield Strength and Residual Stress Measurements on Friction-Stir-Welded Aluminum Alloys

    Lemmen, H. J. K. / Alderliesten, R. C. / Pieters, R. R. G. M. et al. | AIAA | 2010


    FRICTION-STIR WELDED STRUCTURE

    HATA TSUNEHISA / HIROBE TOSHIKAZU | Europäisches Patentamt | 2016

    Freier Zugriff

    Friction-stir welded structure

    HATA TSUNEHISA / HIROBE TOSHIKAZU | Europäisches Patentamt | 2015

    Freier Zugriff

    FRICTION-STIR WELDED STRUCTURE

    HATA TSUNEHISA / HIROBE TOSHIKAZU | Europäisches Patentamt | 2015

    Freier Zugriff