Structures of Zinc-Manganese Phosphate Film and Organic Coating on Magnesium Alloys

Wei Lan; Jian Chun Sun; An Ruo Zhou; Ding Fei Zhang

doi:10.4028/www.scientific.net/MSF.610-613.880

Paper Titles

Mechanical Testing and Numerical Simulation of the Fracture Toughness of Magnesium Alloy AM60 under Impact Loading
p.859

Bonding of AZ91D Mg Alloy and Al Metal with Mg-Al Eutectic Alloy and its Application in Al Coating on AZ91D Mg Alloy
p.866

Effect of TiN/CrN Multilayer Coating by Cathodic Arc Deposition on Wear and Corrosion Behaviours of AZ91D Magnesium Alloy
p.870

Preparation of Aluminum-Magnesium Alloys from Magnesium Oxide by Molten Salt Electrolysis Method
p.874

Structures of Zinc-Manganese Phosphate Film and Organic Coating on Magnesium Alloys
p.880

Effect of Ga on the Microstructure and Mechanic Al Properties of AZ81 Alloy
p.884

Morphology of α-Mg₃Sb₂ Precipitates in Mg-Sb Binary Alloys
p.892

The Anticorrosive Properties of Sol-Gel Coating on AZ31 Magnesium Alloy
p.899

Study on the Technology of the Environment-Friendly Conversion Coating Containing Phytic Acid for Magnesium Surface
p.905

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Structures of Zinc-Manganese Phosphate Film and Organic Coating on Magnesium Alloys

Abstract:

The solution mainly containing Zn2+, Mn2+, Ni2+ and H2PO4- was used to prepare phosphate film on AZ31 magnesium alloys. The process was adjusted to the following parameters, PH value 3～4, temperature 25～40°C, treatment time 3～10 min. Surface characteristics and microstructure of the phosphate film were also investigated by SEM and XRD. The film can fit for organic coatings prepared with electrophoresis and painting.It is found that the coatings adhered well to the phosphate film, and the anti-corrosion abilities were improved. The coating has no change in 3% NaCl solution for 360h and in neutral salt fog for 168h, respectively.