Galvanizing a welded metal structure using the hot-dip method requires a clean weld area because this parameter affects the appearance and quality of the final result.
When using a coated electrode for welding, all slag produced during the work process must be removed prior to galvanizing, otherwise the coating will not be securely attached to the surface at the welding sites, resulting in bare spots on the coating.
Use of chemical detergents, which are used in the galvanizing process, are not able to remove the slag from welding, and therefore it is required to apply grinding using abrasive jet or fire cleaning, wire brush.
Slag produced during welding melts under the influence of the welding wire and remains on the welding seams. Seams that perform bare wire, do not lead to the appearance of slag, and therefore do not require grinding.
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