Operation and maintenance
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Operation and maintenance - 2

Operation and maintenance Hot-dip galvanized items corrode over time. The rate of corrosion depends on the environment and mechanical impacts to which the items are exposed. The life of a hot-dip galvanized surface under different types of corrosion exposure from C1 to C5 is prescribed in Table 1. TABLE 1: THE LIFE OF THE ZINC COATINGS IN CORROSIVITY CATEGORIES C1-C5 IS BASED ON THE MEAN ZINC LAYER THICKNESS ACCORDING TO EN ISO 1461:2009 ZINC LAYER THICKNESSES ACC. TO EN ISO 1461 1) LIFE TIME OF ZINC COATING IN DIFFERENT CORROSION CATEGORIES Zinc layer thickness 3), μm Steel, special...

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Operation and maintenance - 3

Repairing damage to hot-dip galvanized surfaces If repair of a hot-dip galvanized surface is necessary, the Nordic Galvanizers branch organisation has published an information leaflet containing requirements and guidance in accordance with Danish Standards DS/EN ISO 1461:2009 for repair work. Section 6.3 of the Standard state that repairs can be carried out using the following methods: a) Metal spraying with zinc b) Application of zinc-rich paint c) Application of low-melting soldering zinc Also see www.nordicgalvanizers.com. Standarden angiver følgende krav til reparationerne: 1. Bare...

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