Cleaning method for galvanized steel coated with metal and plastic in Dalian:

Cleaning method for galvanized steel coated with metal and plastic in Dalian:

Usually, metal surfaces are covered with dust, oil stains, oxide scales, rust layers, pollutants, salt content, or loose old paint films. The success of painting mainly depends on the quality of surface treatment. If these substances are not removed and directly applied, it will inevitably affect the adhesion and anti-corrosion ability of the entire coating.

The painting process is closely related to the quality of painting, and it is required to control the relative line speed ratio of the painting roller, paint lifting roller, measuring roller, and substrate within a certain range. It is necessary to set a certain viscosity range for the coating according to different systems and the film thickness of the coated products, to ensure smooth coating and promote the improvement of product quality. The curing process of coatings and oven control must be controlled according to requirements and must not be arbitrarily changed, otherwise it will seriously affect the color difference and performance of the coated products.

Cleaning methods for galvanized steel coated with metal and plastic in Dalian

Due to different surface conditions, the recommended cleaning methods for uncoated galvanized steel vary. A simple solvent cleaning of the new clean galvanized sheet is sufficient to remove any protective oil used for outdoor storage of galvanized sheet. Other temporary protective measures such as chromate treatment must be removed using the methods recommended by the manufacturer. Epoxy and latex coatings have no roughness requirements and can be tightly bonded on smooth and clean galvanized surfaces, but some construction workers consider it necessary to use phosphoric acid or other chemical treatments.

It is necessary to measure the construction and design of steel structures in order to ensure good anti-corrosion effect. Structural designs that are easy to collect and store water, dirt, and pollutants should be avoided. On the contrary, the design of steel structures should be easy to drain and dry. In this way, pollutants will not affect the painted surface.

Valve components painting precautions: Valves are a type of pipeline accessory made of cast iron, which can be used to control the flow of various fluids such as air, water, steam, various corrosive media, mud, oil, etc. The anti-corrosion protection of valve surfaces is crucial, and the use of anti-corrosion coatings can effectively prevent substrate corrosion.

The process principle of electrostatic powder spraying is basically the same as that of electrostatic coating for liquid coatings. High voltage direct current (30-90kV) was applied between the grounded metal workpiece and the spray gun electrode.

Under the action of compressed air, the powder coating is sprayed and dispersed into the air by the spray gun. The powder particles collide with the ionized air particles generated by the corona discharge of the spray gun electrode, forming charged powder particles that are adsorbed on the grounded metal workpiece surface.