Coating of aluminum fin condenser for copper tube

There are three kinds of coating for copper tube aluminum fin condenser:

Sprayed with polyester coating.

Spray polyurethane coating.

Spray acrylic coating.

The advantages and disadvantages of various coatings are as follows:

Sprayed polyester coating: the advantage is bright color, the disadvantage is low adhesion, easy aging.

Spray polyurethane coating: the advantage is high adhesion, not easy to age, the disadvantage is a single color.

Spraying acrylic coating: the advantage is high adhesion, not easy to age, the disadvantage is high cost.