Powder coating primer containing zinc MT-PZ ALZ55V
WA：+86 132 6275 2056
WEB: std-coatings.com
Product Overview
MT-PZ ALZ55V is a high-performance zinc-rich epoxy powder primer designed to provide exceptional corrosion protection for mild steel. Combining cathodic protection and a barrier effect, this duplex system ensures long-lasting durability for critical steel structures exposed to harsh environments. Its specially formulated epoxy-zinc composition provides conductivity to enhance cathodic protection, while an integrated anticorrosive function ensures protection even in the case of surface scratches.
This primer is ideally suited as the base layer in multi-layer protective coating systems and is recommended for industrial and structural applications where steel longevity and protection against corrosion are critical.
Application
MT-PZ ALZ55V is suitable for:
Industrial Steel Structures:Warehouse frameworks, machinery frames, storage racks.
Infrastructure Components:Bridges, guardrails, pipelines, and steel supports.
Architectural Elements:Window frames, gates, fences, and structural steel in buildings.
Heavy Machinery:Agricultural, construction, and mining equipment.
Marine and Coastal Steel:Exposed steel structures in C3–C4 corrosivity categories (per ISO 12944) when combined with compatible topcoats.
Typical Coating System Recommendation:
Substrate:Grit/shot-blasted mild steel
Primer:MT-PZ ALZ55V (70–120 µm)
Intermediate / Topcoat:Epoxy, polyester, or polyurethane powders/liquids depending on chemical and UV exposure
Performance:Duplex coating system achieving long-term corrosion resistance, suitable for moderate to high corrosive environments
Standards & Compliance
MT-PZ ALZ55V has been tested and meets or exceeds the following international standards:
ISO 12944 – Corrosion protection of steel structures by protective paint systems (C3–C4 categories)
ISO 8130 – Determination of particle size and distribution for powder coatings
ISO 2360 – Measurement of film thickness for coating systems
Qualisteelcoat Approved: Base Material Steel PE-0097 (2-coat system)
Powder Properties
| Property | Specification | Notes |
|---|---|---|
| Chemical Type | Thermosetting Epoxy | Zinc-rich formulation |
| Appearance | Smooth | Consistent powder flow |
| Color | Grey | RAL 7012 approximate |
| Recommended Film Thickness | 70–120 µm | Optimal corrosion protection |
| Density | 2.9 ± 0.03 g/cm³ | Ensures coverage and conductivity |
| Application Method | Corona Electrostatic Spray | Tribo not recommended |
| Storage | Dry, cool ≤ 30°C | Prevent moisture absorption |
| Shelf Life | ≥12 months | From production date |
Pretreatment Recommendations
| Substrate | Mechanical Pretreatment | Chemical Pretreatment |
|---|---|---|
| Mild Steel | Grit Blasting Sa 2.5 (ISO 8501-1), Roughness Rz 35–60 µm / Ra 6–12 µm | Not applicable |
| Cast Steel / Electro Zinc Steel | Not recommended | Not recommended |
| Hot Dip Galvanized Steel / Zinc Sprayed | Not recommended | Not recommended |
Proper surface preparation is essential to achieve the optimum adhesion, corrosion protection, and overall system performance.
Application Notes
Maintain the recommended film thickness (70–120 µm) to achieve maximum barrier and cathodic protection.
Curing should occur in a convection oven with air temperature ≤180°C. Infrared heaters may be used if required.
Object temperature during curing should not fall below 110°C or exceed 180°C.
Reclaimed powder may be recycled with a minimum of 70% new powder to maintain coating performance.
Gun nozzles should be cleaned every 30 minutes to prevent buildup and ensure even application.
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