Painting Classroom: Preparation and spraying of anti-corrosion coatings

First check whether the type and name of the anti-corrosion paint meet the requirements for use. After the anti-corrosion paint is opened, it should be thoroughly stirred to make the precipitate evenly mixed. Two-component paint must be blended on site according to the ratio, engineering dosage and permitted construction time specified in the specification.

ET-98 inorganic phosphate long-acting zinc-rich coating. The mixing ratio of A and B is 1:2. The zinc powder of component A is poured into component B, mixed and mixed, and matured for 20 minutes.

Chlorinated rubber topcoat. The chlorinated rubber topcoat is a single-pack coating, which can be used evenly after being opened.

Formulation of H06-1 epoxy zinc-rich antirust primer. The ratio of combination of A and B is component A: component B = 4:1. Add component B to the vat of component A, stir well, and let it stand for 20 minutes before use.

The preparation of 70-H epoxy iron red anticorrosive paint and ZHL51-2 super thick pulp epoxy asphalt anticorrosive paint can be carried out in the same way.

H06-3 epoxy cloud iron antirust paint. The mixing ratio of A and B is component A: component B = 4:1. Add the B component of the small bucket to the vat of the component A, stir well, and let it stand for 20 minutes before use.

Airless high pressure spraying methods can be used, or manual or air spray construction methods can be used. In order to ensure the thickness of the paint film in the welding, corners, corners, etc., before the large-area painting, the paint should be pre-sprayed. When painting, the operator should always measure the wet film thickness with a wet film thickness gauge. When painting, the upper and lower rear and left and right, or the vertical and horizontal painting methods of the upper and lower sides and the upper and lower sides should be adopted to make the anti-corrosive paint film smooth and even and uniform in thickness. The surface treatment quality is checked according to the color photographs in the national standard. Check the surface condition of the paint film with the naked eye. The paint film should be free from pinholes, shedding, sag, cracks, and leakage coating.

The dry film thickness is measured by a paint film thickness gauge. The thickness of the paint film should be determined after each application. The total thickness of the paint film must be determined after the coating is completed. One point is measured every 1-3 square meters, and the thickness value of more than 90% of the measuring points must reach the specified value, and the film thickness that does not reach the specified value is not less than 90% of the specified value. Whether it should be recoated or overcoated.

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