Corrosion characteristics of BaTiO3 perovskite coatings on AZ31 alloy
Keywords:
Mg alloys, AZ31, Mg alloys; AZ31; BaTiO3, Silicone resign, Corrosion, Silicone resin, CorrosionAbstract
In this work, we have synthesized BaTiO3 perovskite material by hydrothermal procedure. The BaTiO3 perovskite material was mixed with silicone resign and coated over AZ31 by doctor blade method and dried in oven at 90 ºC. The coating was cured for 2-6 h before commencing the tests. Initially, open circuit potential was recorded and preceded for electrochemical impedance (EIS) measurements. Finally, linear sweep voltammogram or Tafel plot was recorded and data was plotted. It is noticed that the OCP was -0.25 V (vs SCE) and corrosion current density found around 6 x10-7 A/cm2. The results reveal that perovskite based BaTiO3 coatings demonstrated a noble shift in the corrosion potential of AZ31 alloys in NaCl medium. The presence of silicone resigns played a vital role in developing homogeneous BaTiO3 perovskite material coatings over AZ31 alloy.
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