Epoxy Zinc-rich Primer XH4028HB is a zinc-rich primer in the epoxy system. An epoxy zinc dust coating, used as a high-performance anticorrosive primer for corrosion protection of facilities and equipment in harsh environments such as petrochemical plants, chemical plants, power plants, bridges and offshore structures, complying with the ISO 12944 requirements for zinc dust primers. Parameters on this page: volume solids 65 ± 2%, dry film thickness 60/80/100 µm, theoretical spreading rate 6.6 m²/L.
Parameter source: T&H manufacturer's Technical Data Sheet (TDS) "Epoxy Zinc-rich Primer XH4028HB"; spreading rate and other values are converted from the TDS parameters and provided for product 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 | 65 ± 2% |
|---|---|
| Dry Film Thickness | 60/80/100 µm |
| Theoretical Spreading Rate | 6.6 m2/L |
| VOC | 330g/L |
| Density / Specific Gravity | 2.73kg/L |
| Number of Components | Two-component |
| Flash Point | 25°C |
| Thinner | 0-10% |
| Mixing Ratio | Base : curing agent = 16:1 (by weight), 82:18 (by volume) |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
An epoxy zinc dust coating used as a high-performance anticorrosive primer for the corrosion protection of facilities and equipment in severe environments such as petrochemical plants, chemical plants, power plants, bridges and offshore structures, complying with the ISO 12944 requirements for zinc dust primers.
| Colour | Zinc grey |
|---|---|
| Gloss | N/A |
| density | 2.73kg/L |
| Volume Solids | 65±2% |
| Volatile Organic Compounds | 330g/L |
| Flash Point | 25°C |
| Mixing ratio | Base : curing agent = 16:1 (by weight), 82:18 (by volume) |
| Typical dry film thickness | 60µm |
|---|---|
| Recommended dry film thickness | 60–100 µm, depending on system requirements |
| Induction time (20 °C) | 10~15min |
| Thinner quantity (by volume) | Airless spray 0–10% | Air spray 10–20% | Roller or brush 0–10% |
| Recommended nozzle size | 0.43~0.64mm | 2.0~3.0mm | None |
| Recommended spray pressure | 15~20MPa | 0.3~0.6MPa | None |
| Application suitability | Recommended | Applicable | Suitable for small-area repair |
*Use a slow thinner in hot weather
| Dry film thickness (µm) | 60 | 80 | 100 |
| Wet film thickness (µm) | 91 | 121 | 152 |
| Theoretical spreading rate (m²/L) | 11 | 8.2 | 6.6 |
| Temperature | Surface Dry | Hard Dry | Pot Life | Recoat interval | |
| Minimum | Maximum* | ||||
| 5°C | 2h | 24h | No data | 24h | / |
| 15°C | 1.5h | 8h | 6h | 12h | / |
| 25°C | 1h | 6h | 4h | 8h | / |
| 40°C | 50min | 4h | 2h | 6h | / |
*The maximum recoat interval depends on the exposure environment and the end use of the coating.
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. Abrasive blast clean to Sa 2½, with surface roughness 40–75 µm. Before rust removal, remove all oil and weld spatter and grind welds and sharp edges. Areas of the coating damaged mechanically and showing localised rust must be spot blast cleaned to Sa 2½ or cleaned with power tools to St 3 before local repair with this primer. If the old film shows chalking or zinc salts, remove the zinc salts and contaminants before applying the intermediate coat or topcoat.
1. During application, ensure ventilation and exhaust, keep away from sources of ignition, and wear protective equipment such as masks and gloves; adequate ventilation shall also be maintained during curing. 2. When mixing, first stir the base thoroughly, then add the curing agent per the ratio and mix evenly; adjust the thinner quantity according to application needs and temperature changes, stir well and allow induction; strain through a sieve before use and keep stirring during use. 3. Excessive thinner reduces sag resistance; never exceed the environmental regulation limits on thinner quantity. 4. This product is suitable only for application over blast-cleaned steel surfaces and approved epoxy zinc dust coatings and inorganic zinc silicate coatings; it must not be applied over other types of coating. Alkyd or alkyd-modified coatings must not be applied directly over this product's coating. 5. During application and curing, the substrate temperature must be above 5 °C and at least 3 °C above the dew point, and relative humidity shall not exceed 85%. 6. Cutting structures coated with this coating produces fumes; take appropriate protection. 7. This product is not suitable for underwater use. 8. Avoid dry spray and over-thick application during application; applying the next coat over a dry-sprayed coating may cause pinholes, and over-thick application extends curing, handling and recoat times. The film thickness must match the surface roughness; low film thickness should not be applied on high-roughness surfaces, and over-thick application should be avoided. The coating contains special filler to improve intercoat adhesion, so thinner coats appear rough, but this does not affect anti-corrosion performance. 9. When work is interrupted, do not leave coating in the paint line, spray gun or spray equipment. Flush all equipment thoroughly with thinner. If the interruption is too long, it is recommended to mix a fresh batch of paint for application. 10. Clean all equipment with thinner immediately after use. Periodically flushing spray equipment during the working day is good practice. The flushing frequency depends on the spray quantity, temperature and spray duration, including interruptions. 11. Dispose of leftover paint and empty cans in accordance with the relevant local regulations.
| 12.5 L per unit | Base 10.3 L | Curing agent 2.2 L |
| 34 kg per unit | Base 32 kg | Curing agent 2 kg |
*In some special cases, other packaging sizes may be used.
Keep sealed in a ventilated, cool, dry place away from sources of ignition. Minimum 12 months.
1. See the safety sheet and the safety data of the relevant materials for the coating and recommended thinner. This is a solvent-borne coating; inhalation of spray mist and solvent shall be avoided, and skin and eyes kept from exposure and contact with wet paint. 2. All work related to the application and use of this product shall be carried out in accordance with the relevant national health, safety and environmental standards and regulations.
3. If welding or flame cutting is required on metal coated with this product, dust and fumes will be generated; suitable personal protective equipment and adequate local exhaust ventilation are required. 4. If in doubt about the suitability of this product, consult the company.
The information provided in this product data sheet is based on laboratory test results that we consider accurate, and is provided for application guidance only. All recommendations and advice given by T&H on the use of T&H products, whether in technical documents, special consultation or otherwise, are based on information we consider most reliable. Our products and the information provided are intended for users with the necessary knowledge and industrial experience, and it is for these end users to determine whether the products are suitable for their use. T&H cannot control the quality and condition of the substrate, nor the various factors affecting the use of the product. Therefore, T&H accepts no liability for any loss, injury or damage arising from the use of our products or from reliance on this product data sheet (unless otherwise agreed in writing). Data in this product data sheet may be revised as necessary based on practical experience and continued product development.
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.
