A WATER BASED PAINT WITH METALLIC PIGMENT FOR MAGNESIUM ALLOY
镁合金水基金属耐蚀涂层的研究

Due to its active chemical property, magnesium alloy is hard to be directly applied with paints on its surface. Therefore, a new enviromental friendly water based paint with metallic pigment was developed, which contains metal powder of micro meters in size and organosilane compound etc. The properties of coatings were investigated by neutral salt spray test, 3.5 % NaCl solution immersion test, electrochemical impedance mesurement and adhension test. Results showed that the paint can achieve good adhesion, better heat resistance and excellent protectiveness for magnesium alloy. The layered microstructure of the coating was studied by Scanning Electron Microscopy. The corrosion mechanism and the protection performance of the coating was also discussed.