The adhesion

hardness

finish and salt spray resistance of five kinds of organic coatings

such as acrylic

epoxy

silicone

ceramic silicone and fluorocarbon

on magnesium alloy die castings were examined comparatively

and availability of the coatings was evaluated in term of economic cost and technical economy. The results reveal that different organic coatings posses different technical economic characteristics. Epoxy resin coating exhibits significant technical economic advantages in corrosion protection

and ceramic silicone and fluorocarbon resin coatings are prominent in hardness and finish

however the corrosion resistance exhibits relatively lower with high cost

showing a lower technical economy

and silicone coating has comprehensive performance and low cost

revealing better technical economy. Although acrylic coating is cheap

poor corrosion resistance restricts its application

deteriorating technical economy.