High-Quality Coatings Start with ZHYAO Spray & Sandblasting Pretreatment

An excellent coating line lies not only in the spraying process itself, but also in the quality of the pretreatment. Pretreatment is the "cornerstone" of coating, and its effect directly determines the adhesion, corrosion resistance and service life of the coating. The spray pretreatment equipment and sandblasting pretreatment equipment provided by ZHYAO, with their high efficiency and environmental friendliness, safeguard the coating quality of numerous industries.

The purpose of pretreatment before coating is to remove impurities such as oil stains, rust and oxide scale from the surface of the workpiece and form a conversion film (such as phosphating film) that enhances the adhesion of the coating. If the pretreatment is improper, even the best coatings and spraying equipment may cause early failure problems such as bubbling and peeling of the coating.

The spray pretreatment equipment of ZHYAO adopts a multi-stage stepped spray design, usually including process tanks for degreasing, water washing, surface adjustment, phosphating, passivation, etc. The equipment ensures the stability of the concentration and temperature of each tank solution through precise pump and valve control and liquid level management. Its unique spray system can form a dense and uniform water curtain, providing thorough cleaning of workpieces without any blind spots. It is particularly suitable for workpieces with relatively simple structures and large batches, such as sheet metal parts, cabinets, and car frames.

For castings, welded parts or workpieces with severe oxide scale and welding slag, sandblasting pretreatment equipment is a better choice. By high-speed jetting of abrasives (such as steel shot, quartz sand, etc.), stubborn impurities on the surface can be thoroughly removed and a certain roughness can be achieved, greatly increasing the contact area between the coating and the substrate and doubling the adhesion. ZHYAO's sandblasting equipment performs outstandingly in terms of sealing, abrasive recycling and dust treatment, providing a cleaner working environment.

Environmental friendliness is another major highlight of ZHYAO's pretreatment equipment. The equipment design focuses on the recycling of resources, such as extending the service life of the bath solution and reducing wastewater discharge through a filtration system. The sandblasting equipment is equipped with an efficient dust recovery device to prevent environmental pollution. This is in perfect alignment with the company's mission of "making coating equipment more environmentally friendly and intelligent".

At present, ZHYAO's pretreatment equipment has been widely applied in industries such as hardware, casting, automobiles, and traffic facilities, becoming an indispensable part of their overall coating solutions. By providing stable, efficient and environmentally friendly pretreatment, ZHYAO helps customers ensure coating quality from the source and achieve true green and sustainable manufacturing.