The corrosion of aluminum alloy in marine atmospheric environment was an essential electrochemical corrosion under thin electrolyte film, which was different from the corrosion in bulk solution, the corrosion rate was related to the thickness and composition of thin electrolyte film. The relationship among film thickness, relative humidity and salt deposit on aluminum alloy surface was established and verified by experiment. The electrochemical properties of 7B04 Al-alloy under thin electrolyte film with different thickness and different NaCl concentration were studied. The results indicate that the free-corrosion potential of 7B04 Al-alloy under thin electrolyte film is easier to reach steady state than that in bulk solution, both free-corrosion potential and corrosion rate are higher under thin electrolyte film. With the decrease of film thickness, the cathodic polarization current density of 7B04 Al-alloy increases, and the anode reaction is suppressed. With the increase of NaCl concentration in thin electrolyte film, the free-corrosion potential of 7B04 Al-alloy decreases, and the corrosion rate increases, but the polarization of the anode and cathode have little effect on the change of NaCl concentration. The free-corrosion potential of 7B04 Al-alloy is no longer changed when the mass fraction of NaCl reaches 5%.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Corrosion Behavior of 7B04 Al-alloy in Simulated Marine Atmospheric Environment


    Beteiligte:
    WANG Chenguang (Autor:in) / CHEN Yueliang (Autor:in) / ZHANG Yong (Autor:in) / BIAN Guixue (Autor:in)


    Erscheinungsdatum :

    2017




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Unbekannt




    Effect of flap peening on stress corrosion cracking resistance of 7B04-T6 alloy

    HE Wang / WANG Yanli / WANG Yanan et al. | DOAJ | 2020

    Freier Zugriff

    Influence and Simulation Study of Surface Coating Damage on Pitting Corrosion of 7B04 Aluminum Alloy

    WANG Chenguang / CHEN Yueliang / ZHANG Yong et al. | DOAJ | 2016

    Freier Zugriff

    Constitutive equations of high strength aluminum alloy sheet 7B04-T6 under warm tension

    Zhi, Z. / Lihui, L. / Tao, L. et al. | British Library Online Contents | 2009