Stannate and permanganate conversion coatings on AZ31 magnesium alloy
作者： F. Zucchi , A. Frignani , V. Grassi , G. Trabanelli , C. Monticelli
DOI: 10.1016/J.CORSCI.2007.04.011
关键词:
摘要: Abstract The formation of stannate and permanganate–phosphate conversion coatings on AZ31 magnesium alloy was investigated in situ by EIS measurements their protective performances were studied different electrochemical techniques diluted (0.05 M) sodium sulphate solution. influence that short or long treatment times exert the such is discussed. While baths always built layers characterized penetrating cracks, produced without interconnected porosity, but defective. This accounted for initial greater protectiveness achieved with treatment; nevertheless, easy penetration electrolytic solution through a layer quickly decreased its corrosion resistance.
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