The Prefab steel building construction alloying of galvanized steel sheet, galvanized steel sheet (such as molding steel plate, corrugated iron, etc.) should not be painted red lead antirust paint on the surface, should coating 2 H06 - zinc yellow epoxy ester primer or other special coatings for protection.
1.Cold-formed thin-walled steel structure effective corrosion protection measures must be taken, should be taken into account in its construction is convenient for inspection, and avoid water flush, paint, silent along the full length and cross section component welding ends shall be closed.
2.Choosing corresponding surface treatment and corrosion protection measures for cold-formed thin-walled steel structure should according to its using condition and environment.
3.Cold-formed thin-walled steel structure should be according to the design requirements for surface treatment, and the derusting method and descaling grade should be consistent with existing national standards of the steel surface before coating corrosion level and descaling grade GB8923 rules.
4.Cold-formed thin-walled steel structure using chemical cleaning method, should choose to have rust removal, phosphating, passivation of two or more function processing fluid, which its quality should be consistent with existing national standards "multi-functional liquid steel surface treatment of general technical conditions" the provisions of GB/T12612.
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