Our range covers Zinc Phosphate (the industry-standard environmentally acceptable anticorrosive), Zinc Dust (for cathodic protection in zinc-rich primers), and Zinc Chromate (for high-specification legacy systems). With the GCC's aggressive marine-industrial environment — salt spray, high temperatures, humidity cycling — proper anticorrosive primer specification is critical to coating system durability.
Technical specifications
| PARAMETER | SPECIFICATION | TEST METHOD |
|---|---|---|
| Zinc Phosphate — Chemical Name | Zinc Phosphate Zn₃(PO₄)₂·2H₂O | — |
| Zinc Phosphate — CAS | 7779-90-0 | — |
| Zinc Phosphate — Zn₃(PO₄)₂ Content | ≥ 97.0 % | Gravimetric |
| Zinc Phosphate — Appearance | White powder | Visual |
| Zinc Phosphate — Oil Absorption | 14 – 22 g/100g | ISO 787-5 |
| Zinc Dust — Chemical Name | Metallic Zinc (Zn) | — |
| Zinc Dust — CAS | 7440-66-6 | — |
| Zinc Dust — Zinc Content | ≥ 95.0 % active Zn | ISO 3549 |
| Zinc Dust — Particle Size | 3 – 10 μm D50 | Laser diffraction |
| Zinc Chromate — CAS | 13530-65-9 (zinc chromate) | — |
| Zinc Chromate — Cr content | As per COA — restricted use | — |
| Packing | 25 kg bags / drums (product dependent) | — |
| HS Code | 3206.49 |
Applications
- Zinc-Rich Primers — Cathodic Protection — Zinc Dust is the active component in zinc-rich primers (organic and inorganic) providing galvanic/cathodic protection to structural steel.
- Zinc Phosphate Anti-Corrosion Primers — Zinc Phosphate is the environmentally preferred alternative to red lead and zinc chromate in corrosion-inhibiting primers.
- Offshore & Marine Anti-Corrosion Systems — Zinc-rich primers are the mandatory first coat in multi-layer corrosion protection systems for offshore platforms, marine structures, and coastal infrastructure in the Arabian Gulf — where salt spray, high humidity, and elevated temperatures demand maximum corrosion protection.
- Pipeline & Tank Protection — Zinc phosphate epoxy primers are the industry standard first coat on internal and external surfaces of above-ground steel pipelines, storage tanks, and pressure vessels in UAE and Saudi Arabia oil, gas, and water infrastructure.
- Zinc Chromate — High-Specification Legacy Systems — Zinc chromate provides excellent corrosion inhibition but is subject to Cr(VI) restrictions under REACH and some SASO specifications.
Key properties
- Zinc Phosphate: Chromate-free (no Cr(VI)); REACH documentation available on request — environmentally acceptable
- Zinc Dust: galvanic/cathodic protection — proven 50-year track record
- Zinc-rich primers: best-practice corrosion protection for GCC steel structures
- Compatible with epoxy, alkyd, and inorganic silicate binder systems
- Zinc Phosphate: good compatibility with most standard primer pigment systems
- Zinc Dust: high loading (80–85% by weight in zinc-rich primer dry film) required for cathodic action
- Zinc Chromate: highest corrosion inhibition but Cr(VI) restrictions apply
- All grades supplied with full heavy metal and regulatory compliance data
Usage and recommendations
Zinc-rich epoxy primer (organic): use zinc dust at 80–85% by weight in dry film with two-component epoxy binder. Zinc phosphate epoxy primer: use at 10–20% PVC in two-component epoxy system. For Saudi Arabia SABER compliance: zinc phosphate is preferred over zinc chromate — confirm with your coatings specification and the relevant SASO standard. Zinc Dust is pyrophoric at fine particle sizes — handle as a flammable solid, maintain dry storage, avoid dust generation, and keep away from ignition sources. Contact Raykem for primer formulation guidance.
Packaging
- 25 kg PE-lined Paper Bags (Zinc Phosphate)
- 25 kg Steel Drums (Zinc Dust — flammable)
- 25 kg Fibre Drums (Zinc Chromate)
- Custom packing on request
Storage and shelf life
Zinc Phosphate: store in sealed bags in a dry warehouse. Zinc Dust: store in sealed steel drums in a dry, cool, ventilated area away from ignition sources (classified as flammable solid UN3077). Zinc Chromate: store in sealed containers away from reducing agents. All: maintain dry conditions to prevent agglomeration and maintain product activity.