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- W2380497980 abstract "AZ91D Mg alloy substrate was pretreated by Cr-free conversion or micro-arc oxidation (MAO), followed by cathode electrophoresis generating the primer layer and spraying generating the top coating. These processes gave rise to two kinds of composite coatings (Cr-free conversion coating/electrophoresis coating/organic coating and MAO coating/electrophoresis coating/organic coating). The performance of the two kinds of composite coatings was evaluated using adhesion test, pencil hardness test, salt-spray test and electrochemical test, and their anti-corrosion mechanisms were discussed. It was found that the two kinds of composite coatings could both significantly improve the corrosion resistance of the Mg alloy. Namely, they could increase the corrosion potential of the Mg alloy by about 130 mV and 80 mV, reduce the corrosion current density by about 40% and 70%, and increase the polarization resistance by about 4 times and 7 times. In the meantime, both composite coatings possessed adhesion force of over grade 1 and hardness of over 7 H. The composite coating pretreated by MAO possessed better corrosion-prevention performance than the other one." @default.
- W2380497980 created "2016-06-24" @default.
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- W2380497980 date "2012-01-01" @default.
- W2380497980 modified "2023-09-22" @default.
- W2380497980 title "Corrosion-Prevention Performance of Organic Composite Coatings on AZ91D Magnesium Alloy Substrate" @default.
- W2380497980 hasPublicationYear "2012" @default.
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