What kind of paint should be used for the maintenance of steel structure workshop?

After many buildings are built, it is necessary to apply a layer of paint to their surfaces, but not what kind of paint can be applied, but it can be determined according to its requirements. The steel structure workshop is one of them, so what kind of paint should be used for the maintenance of the steel structure workshop?

1. primer + intermediate paint + finish: common epoxy zinc rich primer + epoxy intermediate paint + various colors of chlorinated rubber finish (anticorrosive life can reach 5-8 years)

2. Primer + intermediate paint + finish: common epoxy zinc rich primer + thick film epoxy micaceous iron intermediate paint + various colors of chlorinated rubber finish (the anti-corrosion period can reach 5-8 years, the difference with the first case is that this matching can increase the film thickness)

 3. primer + intermediate paint + finish: common epoxy zinc rich primer + epoxy intermediate paint + aliphatic polyurethane finish of all colors (anti-corrosion period can reach 6-8 years)

4. primer + intermediate paint + finish: common epoxy zinc rich primer / epoxy zinc phosphate primer / epoxy iron red primer + epoxy micaceous iron intermediate paint + all colors of acrylic polyurethane finish (anti-corrosion period can reach 6-8 years)

5. primer + finish: red lead anti-rust paint + various alkyd enamel paint (anti-corrosion period can reach 2-3 years)