Inorganic Zinc-rich Primer ZD2550 is a zinc-rich primer. As a single coat, it can be used on steel surfaces exposed to moderate to severe corrosive environments and subject to abrasion. A two-component, solvent-borne, self-curing inorganic zinc-rich primer. Parameters on this page: volume solids 44 ± 3%, dry film thickness 40/60/80 µm, theoretical spreading rate 0.310 kg/m². Comparable products of the same brand and type: Inorganic Zinc-rich Primer ZD2560, Inorganic Zinc-rich Primer ZD2570, Inorganic Zinc-rich Primer ZD2580.
Parameter source: ZINDN original technical data sheet (TDS) "Inorganic Zinc-rich Primer ZD2550"; values such as spreading rate are converted from TDS parameters and are 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 | 44 ± 3% |
|---|---|
| Dry Film Thickness | 40/60/80 µm |
| Theoretical Spreading Rate | 0.310 kg/m² |
| VOC | ≤550g/L |
| Density / Specific Gravity | 1.7 ± 0.1 |
| Number of Components | Two-component |
| Flash Point | >25 °C (components A, B and the mixture) |
| Thinner | ZX06-5 Thinner |
| Mixing Ratio | Component A (base) : Component B (curing agent) = 3:1 |
ZD2550 Inorganic Zinc-rich Primer
A two-component, solvent-borne, self-curing inorganic zinc-rich primer;
Provides high cathodic protection and anticorrosion;
Excellent anti-corrosion, weather and abrasion resistance; in dry environments, long-term heat resistance up to 400 °C, withstanding occasional short-term temperatures up to 500 °C;
High chemical resistance in media with pH 6–9; a weldable primer.
Used as a high-performance anti-corrosive primer for steel structures in atmospheric environments;
As a single coat, suitable for steel surfaces exposed to medium to severe corrosive environments and subject to abrasion;
Suitable for the interior of tanks or holds, for oils or solvents of low water content and approved dry cargoes.
| Colour | Grey |
|---|---|
| Gloss | Matt |
| Volume Solids | 44±3% |
| Mixed density (kg/L) | 1.7±0.1 |
| Dry film thickness (µm) | Minimum 40 | Typical 60 | Maximum 80 |
| Wet film thickness (µm) | 91 | 136 | 182 |
| Theoretical spreading rate (kg/m²) | 0.154 | 0.232 | 0.310 |
| Practical Spreading Rate | Allowing for a suitable loss factor |
|---|---|
| VOC content | ≤550g/L |
| New steel | First remove grease and other contaminants from the steel surface with a suitable cleaner. Remove weld slag and grind sharp edges smooth so that the specified film thickness can be applied uniformly over the whole surface. All cutting, welding and grinding of the steel shall be completed before surface preparation where possible, then blast clean to Sa2.5–3 (ISO 8501-1) with a surface profile of 50–80 µm (Rz). An excessively low profile reduces film adhesion; an excessively high profile shall also be avoided to prevent pitting. |
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| Shop-primed surfaces | When applying inorganic zinc-rich primer, a secondary surface preparation must remove all shop primer, surface contaminants and zinc salts, ensuring film adhesion. |
| Existing coating | All old coating must be removed; heavily rusted areas may retain water-soluble salts, so clean repeatedly with cleaner and blast clean to at least Sa 2.5. |
Substrate temperature must be at least 3 °C above the dew point; the application surface must be kept clean and dry.
Temperature and relative humidity must be measured on the substrate near the work area. Ethyl silicate zinc dust coatings generally require moisture to cure. At low ambient humidity, mist the coating lightly with (fresh) water to promote curing, and/or humidify the air. Before recoating, the coating must be fully cured, otherwise adhesion to the next coat may be inadequate.
Do not apply outdoors in adverse weather such as rain, fog, snow, strong wind and heavy dust;
In hot summer weather, guard against dry spray; provide ample ventilation during application and drying in confined spaces;
| Mixing | This product is supplied as two containers forming one unit. Stir the base thoroughly with a power mixer, add the curing agent in the specified ratio, stir again with a power mixer, and add the recommended thinner to adjust to a suitable application viscosity. Once mixed, use within the specified pot life. |
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| Thinner / Cleaning Solvent | ZX06-5 Thinner |
| Mixing ratio (by weight) | Component A (base) : Component B (curing agent) = 3:1 |
| Induction Time | 20 min (25 °C) |
| 5°C | 15°C | 25°C | 35°C |
| 10 h | 8 h | 6 h | 4 h |
| Application Methods | Airless spray and air spray are recommended; brush and roller are recommended only for touch-up, small-area application or repair. |
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| Application Methods | Unit | High-pressure airless spray | Air Spray | Brush/roller |
| Spray gun tip size | mm | 0.38~0.53 | 1.5~2.5 | —— |
| Spray pressure | kg/cm² | 150~200 | 3~4 | —— |
| Thinning quantity | % | 0~10 | 10~20 | 5~10 |
| Substrate surface temperature | 5°C | 15°C | 25°C | 35°C |
| Touch Dry | 35 min | 20 min | 15 min | 5 min |
| Hard Dry | 4 h | 3 h | 2 h | 1 h |
The curing reaction rate depends on the humidity conditions. The degree of cure may be checked by the MEK test (ASTM D 4752). Full cure is indicated when scraping the coating surface reveals a metallic sheen and the coating is not soft; overcoating may proceed only after full cure. For longer overcoating intervals, the surface shall be cleaned to ensure it is dry and free from zinc salts and contamination. Note: the above data are measured under conditions of good ventilation, typical film thickness and 65% relative humidity, and are for reference only.
Actual drying times and the interval before recoating may be longer or shorter depending on film thickness, ventilation, humidity, the underlying paint, requirements for early handling and mechanical strength, and other factors.
| Subsequent coat | Mist-coat with epoxy sealer or another approved epoxy; for high-temperature areas (≥120 °C), repair or overcoat with an approved heat-resistant coating. Must not be used with alkyd coatings |
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This product may be applied only over well-blast-cleaned bare steel, and cannot be self-recoated after drying. If the inorganic zinc-rich coating requires repair, use a suitable organic zinc-rich primer.
Before applying the next coat, the inorganic zinc-rich primer shall be fully cured, otherwise adhesion will be affected.
| Packaging Specifications | Component A 22.5 kg, Component B 7.5 kg |
|---|---|
| Flash Point | >25 °C (components A, B and the mixture) |
| Storage conditions | Store in accordance with national regulations. The storage environment shall be dry, cool and well ventilated, away from heat and ignition sources. The pack |
| Shelf life | Shelf life is 6 months under good storage conditions. |
This product contains flammable materials; site safety must comply with the relevant national or local regulations. Read the safety labels on the packaging and the product Safety Data Sheet (MSDS).
Avoid inhaling solvent vapours and spray mist, avoid contact of paint with skin and eyes, and do not swallow the product. Take the necessary precautions and protective measures for fire prevention, explosion prevention and environmental protection. Use only in well-ventilated conditions. In confined or poorly ventilated areas, provide forced ventilation.
Waste disposal must comply with the relevant national or local regulations.
The information and data in this document are accumulated from our tests and practical experience and may serve as an application guide. Since the use of the product is generally beyond our control, we guarantee only the quality of the product itself. We reserve the right to modify this document without prior notice as the product is improved.
| Version information | Published in July 2020; this data sheet supersedes all previous versions |
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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.
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
Packaging specifications and batch lead times are subject to actual availability. PleaseContact Uscontact us for project-based calculation.
The factory item numbers of Inorganic Zinc-rich Primer ZD2550 are as follows.Item No.is the most accurate form when ordering;Colour/colour codecorresponds to the actual colour (RAL, GSB are colour chart codes);Packaging SpecificationsFactory complete-set specification format. Colors not listed may be ordered against the colour card.
| Item No. | Colour / colour code | Packaging Specifications |
|---|---|---|
| ZD2550 | — | 22.5 KG + 7.5 KG |
This model has a total of1item numbers, all listed on this page; colours outside the table (including special colours and bulk packaging) can be confirmed by phone, delivery dates are advised according to the factory's current production schedule and stock. In the packaging specification, the "+" indicates the complete-set notation for two-component products (base + curing agent), subject to the factory specification; a "—" in the colour column denotes an auxiliary product, or that the item has no colour code in the factory system.
