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Galvanized Steel Roof Panel

Galvanized steel roof panel is made by cold rolled steel sheet, then through chromated, uncoiled, various spangles, hot dipped .The surface of SGCC/SGCH/DX51D/JID G3302 full hard galvanized coil is coated by zinc. Galvanized steel roof panel has convenient installation, high......

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Product Description                                          

Galvanized steel roof panel is made by cold rolled steel sheet, then through chromated, uncoiled, various spangles, hot dipped .The surface of SGCC/SGCH/DX51D/JID G3302 full hard galvanized coil is coated by zinc.

Galvanized describes steel or iron surfaces shop-coated with a layer of hot-dip zinc. Galvanizing alone can last for decades in mild conditions, but organic coatings may be applied as topcoats to add color, or to extend the life of the structure especially in aggressive environments. The biggest challenge in painting galvanized metal is achieving proper adhesion, and most problems start with either pre-treatments, poor surface preparation, or improper choice of coating system.

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Application

Galvanized steel roof panel has convenient installation, high strength, low dissipation, the characteristics of oxidation resistance is strong, widely used in prefabricated houses, factories, warehouses, garages, exhibition center, cinema, etc of wall and roof.



The Problem with Pre-Treatments

Galvanizers sometimes pre-treat the surface with chromates or other passivating treatments to prevent the formation of “white rust” during transportation or storage of the galvanized parts. However, these treatments can interfere with adhesion of the applied coating, so specifiers must take care to require that galvanized surfaces not be passivated if the parts are to be painted. And if any passivation treatment is present, it must be removed prior to coating application. Newly galvanized surfaces should always be tested for chromates unless it’s absolutely certain that no chromate treatment was applied.


Surface Preparation

Newly galvanized metal is shiny and smooth with virtually no anchor pattern. A very common cause for paint failure is poor adhesion of the coating over an un-roughened, un-dulled and excessively smooth galvanized surface.

Proper surface preparation may start with SSPC SP-1 Solvent Cleaning to remove oil/grease contamination. But if the galvanized surface is shiny, the surface must then be de-glossed and roughened in one of two ways:

•in mild building environments, washing with a chemical etching solution such as MPI #25

•in aggressive environments where practical, brush-off abrasive blasting (SSPC-SP 7). Blasting at lower pressures (50 psi) and/or with softer abrasives (sponge, corncobs, walnut shells, etc) can produce a suitable surface profile while minimizing damage to the underlying zinc.

Most problems with coating galvanized surfaces can be minimized or eliminated if surface preparation work is appropriate and complete and if the proper primer and topcoats are specified, as illustrated in these two jobsite examples.


Package Show

1. Use special anti-rust paper wrap, plastic film cover.

2. Cover with upper and lower cover plate and side guard plate.

3. Strapping way time: criss-cross is not less than 3 times


Reinforce the goods before shipment to make sure the goods are safer.

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    • E-MAIL: sales@supereal-group.com
    • Phone: +86-532-67756345
    • Fax: +86-532-82860084
    • 24 hours service: +86-139-6980-9032
    • Company: Supereal Enterprise Limited
    • ADDRESS: Industrial Park, Guanxian County, Shandong province, China

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    Supereal Enterprise Limited is a professional company engaged in the products of galvanized steel , galvalume steel, prepainted steel, steel roofing fiberglass roofing sheets and other building products. The production bases are Shandong Zhuoyu Steel Sheet Co.Ltd

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