• Product Description
  • DB-7G high-temperature anticorrosive coating is resistant to 300 degrees

    1、 Product features:

    DB-7G high-temperature anti-corrosion coating has excellent heat resistance, oil resistance, acid resistance, peeling resistance and nitrate stress corrosion resistance under high temperature conditions (300 ℃), which can extend the service life of blast furnace and hot blast furnace.

    2、 Scope of application:

    It is widely used in the internal and external walls and vaults of blast furnaces and hot blast furnaces in chemical industry, and also in the protection of chimneys, flues, high-temperature hot gas pipes, heat exchangers and other metal surfaces requiring high-temperature corrosion protection.

    3、 Performance indicators:

    project

    index

    Inspection standard

    Appearance and color of paint film

    Black, gray, flat and smooth paint film

    GB9761

    Viscosity (SC coating - 4 #/20 )

    30-70

    GB/T1723

    Adhesion (cross cut method)

    0

    GB9286

    Corrosion resistance

    5HNO3Solution boiling15 unchanged

    GB/T 9274-88Immersion method

    5H2SO4Solution boiling15unchanged

    5HClSolution boiling15unchanged

    Flexibility, mm

    1

    GB/T1731

    Water resistance (40 ) 240h

    No obvious change

    GB/T1733

    Impact strength, kg, cm

    50

    GB/T1732

    Acid resistance, 48h

    No obvious change

    Immersion at normal temperature0.1HN2SO4In solution

    Heat resistance, 300 /500h

    No bubbles, no peeling, slight discoloration

    GB/T1735

    Weather resistance, 500h

    Loss of light 20%, pigment E 3.0NBS, other no obvious change

    ASTMG53

     

    4、 Construction parameters:

    1. Construction conditions: ambient temperature 5 ℃~35 ℃, relative humidity ≤ 80%. Construction is not suitable in rainy, snowy and foggy days.

    2. Substrate treatment: sand blasting to Sa2.5, surface roughness 35~70 μ m。

    3. Construction method: high-pressure airless spraying, air spraying and roller coating are recommended.

    4. Paint ratio: fully mix and mix according to the weight ratio A: B=5:1.

    5. Reference dosage: 200~220g/m2 (dry film thickness not less than 20 μ m)。

    6. Diluent: special diluent, the dosage shall not exceed 5% of the total weight of the paint.

    7. The first matching paint: zinc silicate antirust paint.

    5、 Safety protection:

    1. Before construction, safety education must be carried out for the construction personnel and management personnel.

    2. During coating storage, mixing and construction, pay attention to ventilation. Smoking and open fire are strictly prohibited. Fire extinguishing appliances must be equipped. Electrical equipment, lighting fixtures and switches on the construction site should be explosion-proof.

    3. The construction personnel shall wear protective equipment. When the skin contacts with the paint, it shall be wiped with diluent in time, and then washed with clean water. Diluent can be used to clean containers or tools, but the amount should not be too much, and it should be carried out in a ventilated place.

    6、 Package specification:

    Component A: 20kg/barrel, packed in iron barrel; Component B: 4kg/barrel, packed in iron drums.

    7、 Storage life:

    Store in a cool, ventilated and dry place with a shelf life of one year. The coating beyond the shelf life can only be used after passing the inspection.

     

     

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