HI-AQU 8494 Water-borne Epoxy Zinc-rich Primer

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HI-AQU 8494 water-borne epoxy zinc-rich paint is a two-component, fast-drying coating that also provides cathodic

Product description

protection; a water-borne environmentally friendly coating product with high anticorrosion performance and application performance.

Product use

As an eco-friendly water-borne zinc-rich primer with high anticorrosive performance, it provides long-term corrosion protection for steel structures in new construction and maintenance under medium to severe atmospheric corrosion, applicable to bridges, petrochemical, municipal engineering, power industry, port machinery and mining equipment.

Physical properties

Surface Preparation

Remove oil and grease in accordance with SSPC-SP1 solvent cleaning.

Abrasive blast clean to Sa 2½ (ISO 8501-1:2007) or SSPC-SP6 (SSPC-SP10 gives better results). If the blasted surface oxidises before application, it must be re-prepared to the specified standard. Surface defects exposed after blasting must be ground, filled or otherwise suitably treated. Surface roughness should be 40–75 µm.

Shop-primed surfaces: the product may be overcoated on unrusted inorganic zinc silicate shop primer; before coating, welds and damaged areas shall be blast-cleaned to Sa2½ (ISO 8501-1:2007) or SSPC-SP6 (or SSPC-SP10 for better results). If the shop primer shows extensive breakdown or heavy rusting, the whole surface shall be blasted. When the product is applied over a shop-primed surface, compatibility and adhesion shall be tested to ensure performance.

Repair of damaged areas Damaged areas shall be abrasive blast cleaned to Sa2½ (ISO 8501-1:2007) or SSPC-SP6 (blast cleaning to SSPC-SP10 is required to achieve the desired performance). Where local areas cannot be blast cleaned, power tool cleaning to St3 (ISO 8501-1:2007) is permitted. HI-AQU 8494 shall be applied only after surface preparation.

Prior to application of HI-AQU 8494, the surface to be coated shall be confirmed clean and dry, and application shall be carried out within the specified recoat interval (refer to the relevant product application instructions).

Other surfaces: if this coating is to be applied to other surfaces, consult the Nippon Paint Industrial Coatings Protective Coatings division.

Application is not recommended at ambient temperatures below 5 °C or above 50 °C, or relative humidity above 75%; steel

Application conditions

The temperature should be at least 3 °C above the dew point of the surrounding air.

Application guidance

The base and curing agent must be mixed thoroughly before use.

Once mixed, use within the pot life.

Application method

Roller/brush/air spray: for touch-up and small-area application. Airless spray: for large-area application. Regardless of the method, the specified dry film thickness must be achieved.

Application parameters

Note: before overcoating, the surface shall be free of chalking and contamination. When the film has been exposed outdoors for a long time and the surface is smooth or contaminated, overcoat adhesion may be affected; therefore the film surface shall be abraded, sweep-blasted or high-pressure water-jetted to ensure adequate adhesion.

The data above are for guidance only. Actual recoat and drying times may be shorter or longer depending on film thickness, ventilation, humidity, coating system, and prior hand or mechanical preparation conditions.

The following intermediate coats/topcoats are recommended for use with HI-AQU 8494 water-borne epoxy zinc-rich paint

Recommended system

Intermediate Coat

• HI-AQU 8485 Water-borne Epoxy MIO Intermediate Coat

Topcoat

• HI-AQU 8430 Water-borne Epoxy Topcoat

Select the coating system according to the specific requirements; refer to the product manual or contact Nippon Paint for professional guidance.

Packaging; curing agent

Storage Curing agent: 6 months (25°C) Storage shall comply with national regulations. Products shall be kept in closed containers in a dry, cool and well-ventilated warehouse, away from heat and ignition sources. The above is the minimum shelf life; use beyond this period requires testing to determine suitability for continued use.

• Thin with deionised water; tap water may contain unknown impurities that affect coating performance.

Precautions

• Stir thoroughly before use to ensure uniform mixing.
• Thinned paint settles faster; stir while applying.
• Once opened, use the coating in one operation.
• At low ambient temperature or high relative humidity, drying slows; force drying may be used to speed it up.
• For professional use only. Refer to the safety information on the packaging and the Safety Data Sheet (SDS) before use.
• Use in a well-ventilated area. Avoid skin contact. In case of accidental splashes on skin, wash immediately with a suitable cleaner or soap and water.
• In case of eye contact, rinse immediately with plenty of clean water and seek medical examination.
• If swallowed, seek medical attention as soon as possible.
• Maintain good ventilation during application.
• If in doubt about the use of this product, consult Nippon Paint.

All information in this product data sheet is based on laboratory tests and practical experience. However, since the product is subject to many unforeseeable and uncontrollable factors in actual use, we guarantee only the quality of the product itself. Read this data sheet carefully and confirm with Nippon Paint that it is the latest version before using the product.

We reserve the right to modify this product data sheet without prior notice.

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.