The types and functions of ultrafilter for cathodic electrodeposition(CED) painting and the functions of charged membrane ultrafilter for CED have been described.
Anionic electrodeposit coating line for aluminum shell of solar water heater is introduced.Anodic oxidation,anodizing electrolytic coloring and anionic electrodeposit coating process are focused.
It has full-looking and glossy coating resistant to heat, rain and weathering. It can withstand solar thermoradiation and reduce the surface temperature of painting system.