Coating Thickness

Thickness

The thickness of the galvanized coating shall conform with Table 1 and Table 2 in AS/NZS 4680:

TABLE 1.

TABLE 2.

The galvanized coating shall be sufficiently adherent to withstand normal handling during transport and erection.

Adhesion

The galvanized coating shall be continuous, adherent, as smooth and evenly distributed as possible, and free from any defect that is detrimental to the stated end use of the coated article. On silicon killed steels, the coating may be dull grey, provided the coating is sound and continuous. The integrity of the coating shall be determined by visual inspection and coating thickness measurements. Where slip factors are required to enable high strength friction grip bolting, where shown, these shall be obtained after galvanizing by suitable mechanical treatment of the faying surfaces. Where a paint finish is to be applied to the galvanized coating, this should be advised at the time of order and all spikes shall be removed and all edges shall be free from lumps and runs.
Surface Finish

The thickness of the galvanized coating shall first be tested by the purchaser/designer at the galvanizer's works, using an approved magnetic measuring device. In the event of any dispute, an independent test shall be carried out in accordance with AS/NZS 4680, Appendix G.

• Note: All source material from Galvanizing Association of Australia used with permission.