SGCC Zinc Coated Galvanized Steel Coil 4.0mm Prepainted PPGL For Metal Roofing Sheet

Aluminized zinc steel is a kind of alloy composed of aluminized zinc alloy structure, which is composed of 55% aluminum, 43.4% zinc and 1.6% silicon solidified at 600℃. The whole structure is composed of aluminized iron, silicon and zinc, forming dense tetrad junction crystal.

Aluminized zinc color coating plate is a new material produced in recent years due to high-end applications, often referred to as CCLI. It is made of aluminized zinc plate (55% aluminum, 43% zinc and 1.6% silicon) which is more corrosion resistant than zinc plating, after surface degreasing, phosphating and complex salt treatment, coated with organic coating and baked.

Prepainted Galvanized Steel Coil/PPGI coating film introduction

Top paint film:

RPE, SMP, HDP,PVDF,Other paints.
Function: It functions as a sunlight proof cover, especially prevent the destroy by the ultraviolet rays. When the top paint film reaches a certain thickness, it forms a compact cover, and reduce the water and oxygen permeability.

Primer paint film:
Polyurethane, Epoxy, PE
Function:Strengthen the adhesiveness between the top paint film and the basemetal. Even permeable water happens, the top paint film will not peel off. There is corrosion inhibitor which is corrosion resistance. Polyurethane is necessary for higher processing flexibility and weather resistance requirements.

Passivation layer
Function:Increase the adhesion between the metallic layer and coating film. Extend life span also.

Metallic coating
Function:The metallic coating provides the fundamental protection for the steel.
The popular coating metal are galvanize, galvalume and other alloyed metals.

Substrate steel
Cold rolled steel is usually used as substrate, it decides the mechanical properties and the steel shape and flatness.

Back paint film
Epoxy, Modified PE.
Back paint can sustain color in good condition and has good binding.

Construction: roofs, walls, garages, sound insulation walls, pipes and modular houses, etc

Automobile: muffler, exhaust pipe, wiper accessories, fuel tank, truck box, etc

Home appliances: refrigerator backboard, gas stove, air conditioner, electronic microwave oven, LCD frame, CRT explosion-proof belt, LED backlight, electrical cabinet, etc

Agricultural use: piggery, chicken coop, granary, greenhouse pipes, etc

Other: heat insulation cover, heat exchanger, dryer, water heater, etc