Preparation and Properties of Molybdate Conversion Coating on AZ31 Magnesium Alloy
Zhao Chun-mei, MI China
Abstract
Zhao Chun-mei, MI China
Abstract
A molybdate conversion treatment process applied to AZ31 magnesium alloy was introduced.Corrosion behavior of the conversion coating in 5%NaCl solution were evaluated by electrochemical methods,morphology and composition of the coating were studied by scanning electron microscopy and X-ray diffraction.Results showed that the molybdate conversion coating had a spherical mesh crack structure with MoO2,MoO3 and MoO(OH)2 as main component and had good coverage to basal body.Corrosion resistance evaluation proved that the coating could play a protective role for the basal body.
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A molybdate conversion treatment process applied to AZ31 magnesium alloy was introduced.Corrosion behavior of the conversion coating in 5%NaCl solution were evaluated by electrochemical methods,morphology and composition of the coating were studied by scanning electron microscopy and X-ray diffraction.Results showed that the molybdate conversion coating had a spherical mesh crack structure with MoO2,MoO3 and MoO(OH)2 as main component and had good coverage to basal body.Corrosion resistance evaluation proved that the coating could play a protective role for the basal body.
Key concepts: Molybdate, Coating, Conversion coating, Magnesium alloy, Materials science, Magnesium, Scanning electron microscope, Corrosion