What it is and why choose it
INTERZINC 52 PART A INDIVISIBLE KIT is the base component (Part A) of Interzinc 52, a two-component, metallic zinc-rich epoxy primer from International. When combined with its dedicated curing agent (Part B), it forms a high-performance primer that complies with the composition and performance requirements of SSPC Paint 20.
This primer is designed to provide maximum anti-corrosive protection as part of coating systems exposed to aggressive industrial and marine environments. It delivers excellent corrosion resistance in both new construction and maintenance projects on correctly prepared steel.
Main features
- Two-component zinc-rich epoxy system: Part A (base) to be mixed with Part B (curing agent) in a 4:1 volume ratio.
- High zinc content protection: Metallic zinc-rich formulation for outstanding anti-corrosive performance on steel substrates.
- SSPC Paint 20 compliant: Meets the composition and performance requirements for zinc-rich primers on steel structures.
- Designed for severe environments: Suitable as a primer within systems for offshore structures, petrochemical plants, pulp and paper facilities, bridges and power plants.
- Versatile application methods: Can be applied by airless spray, conventional air spray and brush (small areas).
- Fast drying and wide application window: Short touch-dry and hard-dry times across a broad temperature range, with extended overcoating intervals.
- Matt finish in industrial colours: Available (as a mixed product) in blue, grey and green, with colour availability varying by region.
- Compatible with multiple high-performance topcoats: Can be overcoated with a wide portfolio of International primers, intermediates and finishes.
Technical specifications
- Product type: Two-component metallic zinc-rich epoxy primer (Part A base component)
- Brand: International
- Colour (mixed product): Blue, Grey, Green (availability depends on region)
- Gloss level: Matt
- Volume solids: 59% ± 2%
- Typical dry film thickness (DFT): 50–75 microns (2–3 mils)
- Typical wet film thickness (WFT): 85–127 microns (3.4–5.1 mils)
- Minimum recommended DFT for anti-corrosive performance: 40 microns (1.5 mils)
- Maximum recommended DFT: 150 microns (6 mils)
- Theoretical coverage: 7.87 m²/litre at 75 microns DFT (315 sq.ft/US gallon at 3 mils DFT)
- Practical coverage: Allow appropriate loss factors
- Mix ratio (by volume): 4 parts Part A (Base) : 1 part Part B (Curing Agent)
- Working pot life (mixed product): 24 h at 5°C; 12 h at 15°C; 5 h at 25°C; 2 h at 40°C
- Application methods: Airless spray, air spray (pressure pot), brush (small areas only); roller not recommended
- Recommended airless spray tip range: 0.43–0.53 mm (17–21 thou)
- Minimum fluid pressure at tip (airless): Not less than 176 kg/cm² (2503 psi)
- Recommended conventional spray equipment: DeVilbiss MBC or JGA gun, air cap 704 or 765, fluid tip E
- Thinner: International GTA220 (or International GTA415)
- Cleaner: International GTA822 (or International GTA415)
- Touch dry / hard dry (mixed coating):
- 5°C: touch dry 2 h, hard dry 10 h
- 15°C: touch dry 90 min, hard dry 6 h
- 25°C: touch dry 75 min, hard dry 4 h
- 40°C: touch dry 45 min, hard dry 2 h
- Overcoating intervals with recommended topcoats (standard curing agent):
- 5°C: minimum 8 h, maximum Extended
- 15°C: minimum 4 h, maximum Extended
- 25°C: minimum 3 h, maximum Extended
- 40°C: minimum 2 h, maximum Extended
- Minimum overcoating intervals with alternative low-temperature curing agent:
- -5°C: touch dry 3 h, hard dry 31 h, minimum overcoat 31 h, pot life 18 h
- 0°C: touch dry 2.5 h, hard dry 16 h, minimum overcoat 16 h, pot life 18 h
- 5°C: touch dry 30 min, hard dry 4 h, minimum overcoat 4 h, pot life 18 h
- 15°C: touch dry 20 min, hard dry 3.5 h, minimum overcoat 3.5 h, pot life 8 h
- 25°C: touch dry 15 min, hard dry 3 h, minimum overcoat 3 h, pot life 2.5 h
- Surface preparation standards: Abrasive blast cleaning to Sa2½ (ISO 8501-1:2007) or SSPC-SP6; oil/grease removal to SSPC-SP1
- Recommended surface profile: 40–75 microns (1.6–3.0 mils)
- Flash point (typical): Part A 29°C (84°F)
- Product weight (mixed product): 2.52 kg/l (21.0 lb/gal)
- VOC (standard curing agent, mixed product): 2.80 lb/gal (336 g/l) per EPA Method 24; 152 g/kg (EU Solvent Emissions Directive 2010/75/EU); 360 g/l (Chinese National Standard GB23985)
- VOC with alternative low-temperature curing agent: 384 g/l (EPA Method 24)
- Specification approvals: Steel Structures Painting Council – SSPC Paint 20
- Pack size for Part A in this kit: 10 litre unit – 8 litres product in a 10 litre pack; 3 US gallon unit – 2.4 US gallons product in a 3.5 US gallon pack
- Typical shipping weight (Part A only): 10 litre unit 24.5 kg; 3 US gallon unit 63.3 lb
- Shelf life (Part A and Part B, unopened): Minimum 12 months at 25°C (77°F), subject to re-inspection thereafter
- Storage conditions: Store in dry, shaded conditions away from sources of heat and ignition
Applications and use cases
When mixed with Part B and applied over correctly prepared steel, INTERZINC 52 is intended for:
- Offshore and marine structures: As a zinc-rich primer in anti-corrosive systems on offshore platforms and other marine-related steelwork.
- Petrochemical facilities: Protection of structural steel in refineries and chemical plants exposed to aggressive industrial atmospheres.
- Pulp and paper plants: Corrosion protection for steel in high-humidity, chemically challenging environments.
- Bridges: Long-term protection of bridge steelwork as part of multi-coat systems.
- Power plants: Structural steel protection in power generation facilities.
- Maintenance and new construction: Designed for both refurbishment of existing assets and coating of new steelwork.
- Shop primed steelwork: Suitable for application to unweathered steel freshly coated with zinc silicate shop primers, subject to appropriate surface preparation.
- Localised repair of damaged inorganic zinc primers: Can be used for spot repair of inorganic zinc primers, following guidance from International Protective Coatings.
Surface temperature during application must always be at least 3°C (5°F) above the dew point. The product is not typically recommended for underwater service unless specifically approved.
FAQ
1. What type of product is INTERZINC 52 PART A?
It is the base component (Part A) of Interzinc 52, a two-component metallic zinc-rich epoxy primer designed for use on properly prepared steel.
2. Can I use Part A on its own without Part B?
No. Part A must be mixed with the dedicated curing agent (Part B) in a 4:1 volume ratio. The mixed product must then be applied within the stated pot life.
3. On which substrates can the mixed Interzinc 52 be applied?
It is designed for correctly prepared steel and for steelwork freshly coated with suitable zinc silicate shop primers. Other shop primers require complete removal by abrasive blast cleaning.
4. What surface preparation is required before application?
Steel should be abrasive blast cleaned to Sa2½ (ISO 8501-1:2007) or SSPC-SP6 with a surface profile of 40–75 microns. Oil and grease must be removed to SSPC-SP1.
5. Which application methods are recommended?
Airless spray and conventional air spray are recommended. Brush application is suitable only for small areas. Roller application is not recommended.
6. What is the recommended film thickness?
Typical application is 50–75 microns DFT, with a minimum of 40 microns for good anti-corrosive performance and a maximum of 150 microns to avoid over-application issues.
7. Can Interzinc 52 be used underwater?
It is not typically recommended for underwater use unless specific approvals are given.
8. How should equipment be cleaned after use?
Flush and clean all spray equipment and tools immediately after use with International GTA822 (or International GTA415) cleaner.
9. What is the shelf life of INTERZINC 52 PART A?
Unopened containers have a minimum shelf life of 12 months at 25°C (77°F), subject to re-inspection thereafter. Store in dry, shaded conditions away from heat and ignition sources.
10. Which topcoats are compatible with Interzinc 52?
Recommended topcoats include selected products from the Intercure, Interfine, Intergard, InterH2O, Interseal, Interthane and Interzone ranges listed in the technical data sheet.
Section 14 – Transport information
Consultar ficha técnica del fabricante.
Section 8 – Individual protection measures
The following guidance is taken from the Safety Precautions section of the technical data sheet and refers to the mixed product:
- This product is intended for use only by professional applicators in industrial situations, following the Safety Data Sheet (SDS) and all relevant Health, Safety and Environmental regulations.
- When welding or flame cutting on metal coated with this product, dust and fumes will be emitted; appropriate personal protective equipment and adequate local exhaust ventilation are required.
- All work with this product must be carried out in compliance with applicable national regulations on health, safety and the environment.
For full and detailed information on required personal protective equipment (PPE), including respiratory, eye/face, hand and skin protection, Consultar ficha técnica del fabricante.
*Contenido generado por IA
