The exterior treatment of galvanized barrels is divided into baking varnish and galvanizing. According to the manufacturer, the phosphating treatment of steel drums before coating improves the adhesion of the product. The coating is amino baking paint or water-based metallic paint, which has bright colors, bright paint film, hard, and outstanding weather resistance.Impact resistance, strong adhesion and other characteristics, the outer surface of the steel drum can be sprayed into a single color, two colors, or three colors according to the user's choice.
The outer surface of the steel drum can also be coated with galvanized layer, divided into white galvanized and Caixia galvanized. The internal treatment of steel drums includes conventional scrubbing treatment, high-cleanliness treatment, phosphating treatment and internal galvanizing, external spray paint and internal coating, etc. The internal coating is divided into PVF coating, epoxy phenolic resin coating and water-based internal coating, which can be directly filled with honey , Edible oil and other commodities, it is also suitable for the packaging of oil and other chemical raw materials.
The galvanized barrel is finished smelting in the metal barrel, and after forming, a layer of zinc is plated on the surface to improve the corrosion resistance of the product. In order to meet the needs of more customers, the galvanized drums produced by our company are divided into closed galvanized drums and open galvanized drums.
The galvanized barrel is in a rotating barrel containing the plated parts, glass balls, zinc powder, water and accelerator. The glass ball as the impact medium rotates with the barrel, and friction and hammering on the surface of the plated parts generate mechanical physical energy. Under the action of the chemical accelerator, the zinc powder is "cold welded" to the surface of the plated parts to form a smooth, uniform and fine plating layer with a certain thickness. For steel substrates, zinc coating is an anodic coating. It is mainly used to prevent corrosion of steel. The quality of its protective performance is closely related to the thickness of the coating.
After the zinc coating is passivated, dyed or coated with a light protectant, it can significantly improve the protective and decorative properties of the galvanized barrel.
In metal packaging, most of them are coated with tinplate, then baked after printing and then manufactured. For different types of products, a small number of paint buckets do not need to be processed and are directly processed into shapes. Because metal thin steel plate, tin plating, etc. will affect the food when the temperature is high, it is harmful to the human body, so when the food is stored, a high barrier layer of anti-rust, anti-corrosion, acid and anti-leakage must be required to meet the above requirements.