Overview
Zinc-rich primers work like galvanizing: the zinc sacrifices itself to protect steel at scratches. Inorganic silicates resist heat and abrasion; epoxy versions are easier to apply and compatible with most topcoats.
They need abrasive blasting to Sa 2½ per ISO 8501-1 with a suitable profile. They are the standard primer of ISO 12944 systems for corrosivity categories C4 and C5.
Uses
- 01Steelwork in chemical and coastal plants
- 02Bridges, substations and energy structures
- 03Outdoor tanks and pipelines
- 04Primer under duplex systems on steel
Selection and acceptance checks
- Check surface preparation Sa 2½ and profile
- Measure dry film thickness (DFT) as specified
- Control humidity and dew point during application
Reference standards
- ISO 12944-5
- SSPC Paint 20
- ISO 8501-1
For reference only. The standards for each project follow its design documents, current Vietnamese codes and the investor’s requirements.
Reference brands
JotunNorwegian paint company making protective coatings for steel, fire protection, floor coatings and powder coatings.
AkzoNobel (International)Dutch paint group; International for protective and fire protection coatings and Interpon for powder coatings.
HempelDanish coatings maker of protective, fire protection and marine coatings.
Brands are listed for reference; World Steel selects suppliers according to each project’s specification.
Sectors and solutions
Sectors
FDI factories Energy Infrastructure Agriculture and food
World Steel services
Steel structures and PEB Warranty and maintenance Expansion and upgrade
