1) Surface state: The galvanized sheet has different surface states due to different treatment methods in the coating process, such as common zinc flower, fine zinc flower, flat zinc flower, zinc flower-free and phosphatized surface, etc. German standards also stipulate that there are surface grades.
(2) Galvanized products shall have a good appearance, and shall not have defects harmful to product use, such as no plating, holes, cracks, scum, excess plating thickness, scratches, chromic acid dirt, white rust, etc. Foreign standards are not very clear about specific appearance defects. When ordering, some specific defects should be listed in the contract.

Galvanized steel plate is to prevent corrosion on the surface of the steel plate to prolong its service life, coated with a layer of metal zinc on the surface of the steel plate, the zinc coated steel plate is called galvanized plate.

Galvalume steel roofing sheet has good heat resistance, can withstand the high temperature of more than 300 degrees Celsius, and aluminum plated steel plate high temperature oxidation resistance is very similar, often used in
Chimney tubes, ovens, illuminators and sunshades.

PPGL surface is a unique smooth, flat and gorgeous star flowers, the base color is silver white. The special coating structure makes it have excellent corrosion resistance. The normal service life of the aluminized zinc plate can reach 25a, and the heat resistance is very good. It can be used in the high temperature environment of 315℃. Coating and film adhesion is good, has good machining performance, can be stamping, shearing, welding and so on; The surface conducts electricity very well.

PPGL has a silver-white ornate finish.
PPGL and galvanized steel plate have similar machining and spraying properties.