IS 9077:1979 is the Indian Standard (BIS) for corrosion protection of steel structures. This standard provides guidelines for the selection and application of protective systems for steel structures against corrosion, with a special focus on aggressive coastal and marine environments. It covers environmental classification, detailed surface preparation methods, various painting and metallic coating schemes, and inspection procedures.
Lays down the code of practice for the protection of steel structures against corrosion by various methods.
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Blast Cleaning Standard (Near-white metal) | Sa 2 1/2 (as per Swedish Std SIS-05-5900) | Sa 2½ (as per ISO 8501-1) | ISO 12944-4:2017 |
| Hot-dip Galvanizing Thickness (for steel >6 mm thick) | Avg. 610 g/m² (85 microns) as per IS 2629 & IS 4759 | Minimum average 85 µm (610 g/m²) | ISO 1461:2022 |
| Environmental Classification (Industrial) | Industrial Atmosphere (Moderate to heavy pollution) | C4 (High) or C5 (Very High) | ISO 12944-2:2017 |
| Example Paint System DFT (Industrial Environment) | ~150 µm (e.g., 1 coat primer, 2 undercoats, 1 finish coat) | 240-320 µm (for C4, High durability system) | ISO 12944-5:2018 |
| Hand Tool Cleaning Reference | St 2 and St 3 (as per Swedish Std SIS-05-5900) | St 2 and St 3 (as per ISO 8501-1) | ISO 12944-4:2017 |
| Recommended Primer Type | Red lead non-setting primer (to IS 104) | Zinc-rich or epoxy primer (performance based, no lead specified) | ISO 12944-5:2018 |