Heavy-duty anti-rust anti-corrosion coating series

1. Introduction:

With the development of industrial technology and the development of steel structure engineering, petrochemical, energy, power, metallurgy, aerospace and other fields, the problem of anti-corrosion has become increasingly serious, and some environments have reached heavy corrosion conditions. Heavy-duty anti-corrosion coatings refer to coatings that can be used in relatively harsh environments for a long time and maintain a good coating state, and have stronger corrosion resistance than conventional anti-corrosion coatings.

2. Product description:

Heavy-duty anti-corrosion coatings have the following characteristics:

A. Heavy-duty anti-corrosion coatings must be composite coating systems. Practice has proved that hundreds of types of heavy-duty anti-corrosion coatings produced by domestic and foreign coating manufacturers should be suitable for cross-sea bridges, harbor projects, offshore platforms, various storage tanks and large-scale steel structure projects. , it is often necessary to spray several coats to form a heavy-duty anti-corrosion coating composite coating system, that is to say, the high-performance primer, mid-layer paint and topcoat need to undertake different functions respectively to exert the overall effect of the composite coating.

B. Special primer for heavy-duty anti-corrosion and anti-rust: The primer is a coating that directly contacts the steel surface and is an important basis for the entire coating system. The primer should have good wettability and adhesion to the steel surface, and the topcoat should be firmly attached; the film-forming substance should have the barrier function of water, oxygen and ion permeation; the pigment should have the function of corrosion inhibition and cathodic protection Function. Only with these basic functions can the steel be protected from rust by natural factors. It is equipped with a special fluorocarbon topcoat to prevent the formation of corrosion cells on the steel surface or prevent the continued development of corrosion, and has excellent outdoor weather resistance.

C. Special topcoat: The topcoat contains a relatively high proportion of corrosion-resistant resin, which is the outermost layer of the heavy-duty anti-corrosion coating system. Its main function is to prevent the corrosion of steel by chemical media, chemical smog, water, gas, etc., to prevent the degradation and damage of the resin in the paint film by ultraviolet rays, and to prolong the protective service life and service life of the coating. Through the manufacture of various color surfaces

Lacquer is decorative and iconic.

D. The heavy-duty anti-corrosion coating contains less solvent and high solid content. Compared with the conventional coating, the theoretical coating amount is large, the consumption of the coating per unit area is less, and the cost is reduced; because the heavy-duty anti-corrosion coating forms a thicker film at one time and has fewer construction times, The coating cycle is short, and the total cost of coating is low.

3. Construction parameters:

3. Construction requirements and plans:

1. Construction conditions:

①.Air spraying, recommended Nozzle diameter: 1.7-2.3mm, spray pressure: 0.25-0.65MPa

②. Airless spraying, recommended nozzle diameter: 0.4-0.5mm, spray pressure: 16MPa

③.Brush and roller

④. Construction interval; 23±2℃ above 20min

2. Surface treatment: ①. The surface of the coated metal steel structure should be treated before use, and the substrate should be clean and free of oil stains. ,

②.[Special primer for heavy anti-rust and anti-corrosion: special curing agent for anti-corrosion primer: general thinner], spray it on the surface of the steel structure substrate at a ratio of about 5:1:3, and after the surface is dry {interval time is 60 minutes (25°C)} after

③. Reuse the top coat.

4. Construction environment: Construction environment: ambient temperature: 5~35℃; relative humidity: ≤ 80%; the surface of the steel structure should be at least 3℃ higher than the air dew point temperature; it is not suitable for construction under strong wind, heavy rain, snow or fog .

5. Drying time, h: surface dryness≤2h; solid dryness≤24h; (25℃±2)

6. Tool cleaning: After cleaning with special thinner for heavy-duty anti-corrosion coatings, the solvent is recovered.

Five, matters needing attention:

1. Storage conditions: Store in a cool and dry warehouse.

2. The storage period of the paint is more than one year, and the expired paint should be used after inspection.

3. After the paint is opened, it should be fully stirred to prevent the pigment from sinking to the bottom and causing color difference.

4. Paint, curing agent and thinner should be sealed and stored in a cool place, protected from fire, leakage, sun protection, high temperature, and away from fire sources.

5. After mixing the paint and curing agent, it must be used up within 4 hours, so as not to affect the effect.

6. Operators should wear safety masks and gloves, avoid contact with skin or eyes, and wash with clean water in case of accidental contact.