Interzinc 22HS High-performance Galvanising Primer is a zinc-rich primer. A high-performance galvanising primer for bridges, tanks, pipes, pipe racks, offshore drilling equipment and transport equipment. A low-VOC, inorganic zinc-rich ethyl silicate primer providing excellent corrosion protection for prepared steel surfaces. Excessive film thickness or over-application of Interzinc 22HS causes mud cracking; once cracking occurs, the affected areas must be completely removed by blasting and re-coated per the original paint system. Parameters on this page: volume solids 81% ± 2%, dry film thickness 62–75 µm (2.5–3 mil), theoretical spreading rate 13.06 m²/L.
Source: AkzoNobel original technical data sheet (TDS) "Interzinc 22HS High-performance Galvanising Primer"; spreading rate and other values are converted from TDS parameters and are for selection reference only.
The above content is compiled from the manufacturer's datasheet and this site's parameter tables. For selection, coating systems and lead times, pleaseContact Usfor confirmation.
This page carries the full TDS for this product, translated from the manufacturer's original document. No file download is needed; for an original-language copy, send an enquiry.
| Volume Solids | 81% ± 2% |
|---|---|
| Dry Film Thickness | 62–75 µm (2.5–3 mil) |
| Theoretical Spreading Rate | 13.06 m²/L |
| VOC | 2.42 lb/gal (290 g/L) US EPA Method 24, regarding… |
| Density / Specific Gravity | 3.28 kg/L (27.4 lb/gal) |
| Number of Components | — |
| Thinner | Do not thin beyond the limit permitted by local environmental regulations. For tropical climatic conditions |
| Mixing Ratio | 1 part : 2.86 parts by weight |
| Colour / Appearance | Red-grey, grey, INTERZINC 22HS |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
A low-VOC, inorganic zinc-rich ethyl silicate primer providing excellent corrosion protection for prepared steel surfaces. The dry film contains 82% zinc dust, providing durable corrosion protection.
A high-performance galvanising primer for bridges, tanks, pipes, pipe racks, offshore drilling equipment and transport equipment.
Excellent protection for steel structures, extending the time before on-site topcoating.
Suitable for industrial, marine and processing environments.
A topcoat is required in environments in contact with strongly corrosive chemicals.
For new construction or maintenance and repair applications.
| Colour | Red-grey, grey, INTERZINC 22HS |
|---|---|
| Gloss | Matt |
| Volume Solids | 81% ± 2% |
| Typical thickness | Dry film 62–75 µm (2.5–3 mil), equivalent to wet film 77–93 µm (3.1–3.7 mil) |
| Theoretical Spreading Rate | At 62 µm dry film thickness and the stated volume solids, 13.06 m²/L; at 2.5 mil dry film thickness and the stated volume solids, 524 ft²/US gal |
| Practical Spreading Rate | Allowing for a suitable loss factor |
| Application Methods | Suitable for airless spray, air spray. Drying time; recommended topcoat recoat interval |
| Temperature | Surface Dry | Hard Dry | Minimum | Maximum |
| 10°C (50°F) | 30 min | 2 h | 48 h | Unlimited¹ |
| 15°C (59°F) | 25 min | 1.5 h | 36 h | Unlimited¹ |
| 25°C (77°F) | 15 min | 1 h | 24 h | Unlimited¹ |
| 40°C (104°F) | 15 min | 1 h | 24 h | Unlimited¹ |
¹ See the "Definitions and Abbreviations" of International Paint's Industrial Protective Coatings division. Recoat intervals depend on environmental conditions. The data listed assume the stated temperature and 50% relative humidity. For detailed recommendations, see "Product Characteristics".
| Flash point (typical) | Component A 17 °C (62 °F); Component B N/A; mixed 19 °C (65 °F) |
|---|---|
| Product weight | 3.28 kg/L (27.4 lb/gal) |
| Volatile Organic Compounds | 2.42 lb/gal (290 g/L) US EPA Method 24. For more details, see the 'Product Characteristics' section. |
All surfaces to be coated must be clean, dry and free of contaminants. Before application, all surfaces must be assessed and prepared in accordance with ISO 8504:2000.
Oil and grease must be removed in accordance with the SSPC-SP1 solvent cleaning standard.
Blast cleaning: blast to Sa 2½ (ISO 8501-1:2007) or SSPC-SP6. SSPC-SP6 is only for humid exposure environments. If oxidation occurs between blasting and application of Interzinc 22HS, the surface shall be re-blasted to the specified visual standard.
Surface defects exposed during blasting must be ground, filled or treated by a suitable method.
Recommended surface roughness 50–63 µm (2.0–2.5 mil).
Shop-primed steel: Interzinc 22HS is suitable for application on unweathered steel members freshly coated with solvent-borne zinc silicate shop primer. If the zinc silicate shop primer shows large or widespread failure, or excessive zinc corrosion products, full sweep blasting is necessary. Other types of shop primer are not suitable for overcoating and must be completely removed by blasting.
Welds and damaged areas shall be blast cleaned to Sa 2½ (ISO 8501-1:2007) or SSPC-SP10.
| Mixing | Interzinc 22HS is supplied in two containers, a liquid base (component A) and zinc dust (component B). The zinc dust (component B) shall be added slowly to the liquid base (component A) under mechanical stirring. Never add the liquid base to the zinc dust. Before application, the paint shall be strained; during spraying, the paint in the container shall be continuously stirred. Once mixed, the paint shall be used within the specified pot life. |
|---|---|
| Mixing ratio | 1 part : 2.86 parts by weight |
| Pot life | 10°C (50°F) | 15°C (59°F) | 25°C (77°F) | 40°C (104°F) |
| 12 h | 10 h | 8 h | 4 h |
| Suitable for airless spray | Recommended: nozzle diameter 0.38–0.53 mm (15–21 thousandths of an inch); total paint pressure at the nozzle not less than 112 kg/cm² (1593 psi) |
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| Air Spray | Recommended | Spray gun | DeVilbiss MBC or JGA |
| Air nozzle | 64 | ||
| (with pressure pot) | Nozzle | D | |
| Brush | Not recommended | ||
| Roller application | Not recommended | ||
| Thinner | International GTA138 | Do not thin beyond the limit permitted by local environmental regulations. For tropical climatic conditions |
International GTA027
| Cleaner | International GTA138 |
|---|---|
| Interruption of work | Do not allow material to remain in hoses, spray guns or spray equipment. Flush all equipment thoroughly with International GTA138. Once mixed, the paint components should not be re-sealed. If the work interruption is too long, mix fresh components. |
| Cleaning | Clean all equipment immediately after use with International GTA138. Periodic flushing of spray equipment during application is also recommended. The flushing frequency depends on the quantity sprayed, temperature and time, including all interruptions. |
Surplus paint and empty containers must be disposed of in accordance with the relevant local regulations.
Below 50% relative humidity, curing is significantly delayed. Steam spraying or water sprinkling may be needed to raise humidity.
Excessive film thickness or over-application of Interzinc 22HS causes mud cracking; once cracking occurs, the affected areas must be completely removed by blasting and re-coated per the original paint system.
Due to the nature of high-solids coatings, care shall be taken to maintain the recommended wet film thickness to avoid excessive dry film thickness.
Apply with care to avoid dry film thickness exceeding 125 µm (5 mils).
The minimum recoat interval depends on the relative humidity during curing. Below 55% relative humidity, the minimum recoat interval is normally at least 24 hours, but is determined by the ambient temperature and relative humidity during application and curing.
Before recoating, perform a solvent rub test in accordance with ASTM D4752. A rating of 4 indicates satisfactory cure for recoating.
In high-temperature systems, the Interzinc 22HS film thickness must be strictly controlled at 50 µm; the continuous dry temperature of Interzinc 22HS is 400 °C.
If this product is used as the primer for Intertherm 50, the dry temperature is normally 400 °C.
Interzinc 22HS is not suitable for exposure to acidic or alkaline environments.
When applying Interzinc 22HS in confined spaces, ensure adequate ventilation.
This product complies with: • SSPC Paint System No. 20, Type 1C. This product holds the following specification certifications: • ASTM A490 Class B slip coefficient. Note: VOC values are typical values for guidance only. The values may vary with factors such as colour difference and general production tolerances.
Where Interzinc 22HS needs to be covered by another coating, the zinc film surface must be clean and free of zinc salts. Any subsequent coat requires at least 50 µm (2 mil) dry film thickness to ensure proper film formation.
Before overcoating with the recommended topcoat, ensure Interzinc 22HS is fully cured. If weathering has occurred, wash all zinc salts off with fresh water, brushing with a bristle brush if necessary.
Recommended topcoats/intermediate coats:
| Intercryl 530 | Intergard 269 |
|---|---|
| Intercure 200 | Intergard 475HS |
| Intercure 420 | Interseal 670HS |
| Intergard 251 | Intertherm 50: in some cases, a mist coat of suitable viscosity is required to reduce bubbling, depending on the ageing of Interzinc 22HS, surface roughness and the environmental conditions during curing and application. Epoxy sealers such as Intergard 269 can also be used to reduce bubbling. |
For other suitable topcoats/intermediate coats, consult International Paint.
| For further information on the industry standards, terms and abbreviations used in this datasheet, see www.international-pc.com | In the following documents on the website: • Definitions and abbreviations • Surface preparation • Coating application • Theoretical and practical spreading rate. These sections are also available as separate publications on request. |
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This product must be applied at the production site by professional applicators in accordance with the recommendations in this manual, the Material Safety Data Sheet and the instructions on the container label. Do not use this product without first reviewing the Material Safety Data Sheet (MSDS) that International Paint provides for its customers.
All work related to the application and use of this product must be carried out in accordance with the relevant national health, safety and environmental standards and regulations.
If welding or flame cutting is required on metal coated with this product, dust and fumes will be generated; use appropriate personal protective equipment and adequate local ventilation.
If in doubt about the suitability of this product, consult International Paint.
| Packaging Specifications | Component A | Component B | ||
| Volume | Packaging | Volume | Packaging | |
| 5 US gal | 2.42 US gal | 5 US gal | 1.22 US gal | 5 US gal |
| 1 US gal | 0.48 US gal | 1 US gal | 0.24 US gal | 1 US gal |
Metric Equivalent:
| Packaging Specifications | Component A volume | Component B volume |
| 5 US gal | 9.16 litres | 4.62 litres |
| 1 US gal | 1.82 litres | 0.91 litres |
| Packaging Specifications | Component A | Component B |
| 5 US gal | 25.3 lb | 72.5 lb |
| Packaging Specifications | Component A | Component B |
| 5 US gal | 11.48 kg | 32.8 kg |
| Shelf life | Component A – at least 6 months at 25 °C (77 °F); Component B – at least 12 months at 25 °C (77 °F). |
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Re-inspection required thereafter. Store in a dry, cool environment controlled at 4–35 °C (40–95 °F), away from heat sources and sources of ignition.
©2016/3/1 AkzoNobel. All rights reserved.
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Information is subject to the manufacturer's latest version; the manufacturer's latest TDS prevails.
The technical parameters on this page are taken from the product's original manufacturer technical datasheet, the copyright of which belongs to the manufacturer. If a rights holder considers the presentation inappropriate, contact us for verification and handling.
Packaging specifications and batch lead times are subject to actual availability. PleaseContact Uscontact us for project-based calculation.
