A two component coating composed of zinc powder, silicate, and special additives, using water as a solvent, is a long-term rust preventive coating. It has three rust preventive properties on the surface of steel, namely cathodic protection, formation of passivation film, and covering effect. Therefore, it has strong rust preventive performance.
Design purpose
Widely used in oil pipelines, locomotives and vehicles, shipbuilding industry, oil drilling platforms, bridges, iron towers, underground engineering, and underwater engineering.
Physical parameters
Color: Gray
Gloss: Matte
Theoretical coating rate: 214g/㎡, 13.3 ㎡/L
Specific gravity: approximately 2.85
Drying time: 23 ± 2 ℃: surface drying ≤ 10min, solid drying ≤ 24h
Complete curing: 23 ± 2 ℃: 7d
Storage period: 12 months for component A and 6 months for component B
Construction instructions
Mixing ratio: Component A (solid material): Component B (liquid material)=73:27
Maturation time: 23 ± 2 ℃: 0.5h
Pot life: 23 ± 2 ℃: 8h
Construction method: high-pressure airless spraying, air spraying, manual brushing, roller coating
Diluent: Dilute with deionized water and clean water
|
|
High pressure airless spraying |
Aerated spraying |
Manual brushing and roller coating |
|
Maximum dilution amount |
5% |
5% |
- |
| orifice |
0.4-0.5mm |
2.0-3.0mm |
- |
|
Ejection pressure |
15-20MPa |
0.3-0.5MPa |
- |
Tool cleaning: clean water
Paint film thickness: Wet film: 75 μ m. Dry film: 50 μ M
Painting interval
|
Substrate temperature |
5℃ |
20℃ |
30℃ |
| shortest |
24h |
8h |
4h |
| unlimited | |||
surface treatment
The coated steel surface must be thoroughly cleaned of oil, scale, rust, old coatings, etc. Shot blasting or sandblasting methods can be used to meet the Swedish rust removal standard Sa2.5 level, and the roughness can reach 30-70 μ M.
Manual rust removal methods can also be used, reaching the Swedish rust removal standard St3 level, with a roughness of 30-70 microns.
Construction conditions
Environmental temperature: 2 ℃ -40 ℃;
Relative humidity: 25% -75%;
The substrate temperature must be 3 ℃ above the dew point.
The supporting coatings include CO7 two component epoxy anti-corrosion topcoat, C252 two component epoxy coal tar asphalt anti-corrosion topcoat, C18 chlorinated rubber anti-corrosion topcoat, C22 alkyd enamel, C13 single component weather resistant acrylic topcoat, C041 two component polyurethane enamel, C14 alkyd blended paint, etc.
Packaging specifications: 25 kilograms in a 20 liter container for component A, and 9.25 kilograms in a 10 liter container for component B.
matters needing attention
This coating should be stored in a cool and dry place to prevent solid materials from getting damp and liquid materials from deteriorating.
Before coating, pour the weighed liquid into a paint mixing dish and gradually add the solid material. Stir while adding, and wait for the solid material to be added before stirring for 15-20 minutes until it is fully mixed before coating. During the coating process, it is also necessary to frequently stir to prevent zinc powder from settling to the bottom, resulting in an imbalance in the ratio of solid to liquid and affecting the quality of the paint film.
Add a special diluent according to the required coating thickness, and the amount of diluent should not exceed 5% (by weight of paint).
The steel surface should be protected from rain for two days after being coated with this coating, and can only be put into use after fully curing. If the next coating needs to be applied, it must wait for the coating to fully cure before applying the next coating. Before applying, the zinc salt on the surface must be removed to avoid affecting the interlayer adhesion.
Notes
The above dry and wet film thickness refers to the indicators during high-pressure airless spraying;
The data related to this manual was obtained in the laboratory, and the actual product may differ slightly from it;
If there are any changes to the above data, the latest manual of our company shall prevail without prior notice.
