Table 1 Requirements for coating thickness and mass for articles that are not centrifuged Steel Thickness Local Coating Average Coating Average Coating mm Thickness Minimum Thickness Minimum Mass Minimum µm µm g/m² 35 45 320 ≤1.5 >1.5 45 55 390 ≤3.0 >3.0 55 70 500 ≤6.0 >6.0 70 85 600 Note: 1 g/m2 coating mass = 0.14µm coating thickness. The thickness of the galvanized coatings on threaded fasteners shall conform with Table 2 in AS1214. Table 2 Requirements for coating thickness and mass for articles that are centrifuged Thickness of Coating Average Coating Average Coating Articles Thickness Minimum Thickness Minimum Mass Minimum (all components µm µm g/m² including castings) mm <8.0 25 35 250 40 55 390 ≥8.0 Note: For requirements for threaded fasteners refer to AS 1214. 1 g/m² coating mass = 0.14µm coating thickness. 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. Surface Finish 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, which is acceptable provided the coating is sound and continuous (See Note 3). Any reparation is to be carried out as per Clause 8 of AS/NZS 4680. 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, all spikes shall be removed and all edges shall be free from lumps and runs. (See Note 4)
Table 1 Requirements for coating thickness and mass for articles that are not centrifuged Steel Thickness mm Local Coating Thickness Minimum µm Average Coating Thickness Minimum µm Average Coating Mass Minimum g/m² ≤1.5 35 45 320 >1.5 ≤3.0 45 55 390 >3.0 ≤6.0 55 70 500 >6.0 70 85 600 Note: 1 g/m2 coating mass = 0.14µm coating thickness. The thickness of the galvanized coatings on threaded fasteners shall conform with Table 2 in AS1214. Table 2 Requirements for coating thickness and mass for articles that are centrifuged Thickness of Articles (all components including castings) mm Coating Thickness Minimum µm Average Coating Thickness Minimum µm Average Coating Mass Minimum g/m² <8.0 25 35 250 ≥8.0 40 55 390 Note: For requirements for threaded fasteners refer to AS 1214. 1 g/m² coating mass = 0.14µm coating thickness. 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. Surface Finish 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, which is acceptable provided the coating is sound and continuous (See Note 3). Any reparation is to be carried out as per Clause 8 of AS/NZS 4680. 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, all spikes shall be removed and all edges shall be free from lumps and runs. (See Note 4)
Standard-Specification-for-Hot-Dip-Galvanized-Coatings.docx