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Metal Corrugated Steel Roofing Panels

Qingdao Lingshan Steel Structure Co.,Ltd

Metal Corrugated Steel Roofing Panels

Country/Region China
Categories Steel Sheets

Product Details

Metal Corrugated Steel Roofing Panels

Metal corrugated steel roofing panels Brief introduction Pre-painted steel sheet is coated with organic layer, which provides higher anti-corrosion property and a longer lifespan than that of galvanized steel sheets. The base metals for pre-painted steel sheet consist of cold-rolled, HDG...

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Product Details

Metal corrugated steel roofing panels
Brief introduction

Pre-painted steel sheet is coated with organic layer, which provides higher anti-corrosion property and a longer lifespan than that of galvanized steel sheets.
The base metals for pre-painted steel sheet consist of cold-rolled, HDG electro-galvanized and hot-dip aluminum-zinc coated. The finish coats of pre-painted steel sheets can be classified into groups as follow: polyester, silicon modified polyesters, high-durability polyester, etc.
Pre-painted Steel offers an esthetic finish with excellent durability, formability and weather resistance.
The painting process begins with a cold rolled steel substrate that undergoes an extensive cleaning process to improve adhesion.

Sketch Map of Sectional Structure of Pre-painted Steel Sheet
Finished coating (Red)
Primer (Orange)
Chemical conversion coating (Green)
Metallic coating (Blue)
Cold-rolled steel sheet (Light-colored blue)
Cold-rolled steel sheet (Light-colored blue)

Coating Structure
1: Type of coating structure
2/1: Coat the top surface of the steel sheet twice, coat the lower surface once, and bake the sheet twice.
2/1M: Coat and bake twice for both top surface and undersurface.
2/2: Coat the top/lower surface twice and bake twice.

2_ Usage of different coating structures
2/1: The anti-corrosion property and scratch resistance of the single-layer backside coating is poor, however, its adhesive property is good. The pre-painted steel sheet of this kind is mainly used for sandwich panel;
2/1M: Back coating has good corrosion resistance, scratch resistance and molding performance. Besides it has good adhesion and is applicable for single layer panel and sandwich sheet.
2/2: The anti-corrosion property, scratch resistance and processing property of the backside coating of pre-painted steel sheet is better, so it is widely used for roll forming.
The base material is then coated with either a galvanized or galvalume layer to enhance corrosion resistance. This is followed by pre-treatment and primer coat to ensure paint adhesion. The final color top coat is then applied.
Typical markets include industries that construct metal buildings, manufacture appliances, air conditioners, lighting fixtures and commercial/residential roofing.

Construction
The pre-painted steel sheet for construction is an attractive substitute for wood and other materials, owing to its advantages, including fast color, good durability performance, chalking resistance, etc. It minimizes the maintenance cost. At the same time, various colors, surface structures and coatings provide such products with great flexibility and option.
In China, more than 90% color coated sheets are applied in construction. They have been recognized by many landmark buildings in China, covering hall centers, sports halls, aviation knobs, cultural facilities, etc.

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