Through various surface treatments, expanded metal not only has a more beautiful finish, but also has excellent corrosion resistance and anti-aging properties, thus extending its service life. We can provide hot dip galvanized, powder coated, anodized and PVDF coated expanded metal surface treatments.
It is the most effective and most widely used surface treatment process to delay the corrosion of carbon steel materials. In order to remove the iron oxide on the surface of carbon steel, firstly, we will pickle carbon steel expanded metal and then put it into ammonium chloride, zinc chloride or their mixed solution for cleaning. Finally, the cleaned expanded metal is put into the hot dip galvanizing tank to make the zinc fully reacts with the iron to form a zinc alloy coating on the expanded metal surface. This zinc coating features uniform coating, strong adhesion and good denseness. It is economical and effective in preventing steel materials from rusting. It is widely used in walkways, stair treads, security fence and other applications.
It is a finishing process that uses an electrostatic spraying machine to spray powder onto the expanded metal surface. Under the action of static electricity, the powder will be evenly attached to the expanded metal surface to form a powder-like coating and then form the final coating after high temperature backing. Powder coating is usually used in combination with hot dip galvanizing process to make expanded metal have superior longevity and a smooth colored surface. Powder coating surface treatment process is widely used in road security fence, machine guards, handrails, etc.
It is an electrolytic process in which a layer of oxide film is formed on aluminum and its alloys under the action of an applied electric current in the corresponding electrolyte and under specific process conditions. It is generally used for aluminum and its alloys. It not only effectively overcomes the defects of low aluminum surface hardness and poor wear resistance, but also makes the metallic luster oxide film present a good decorative effect. As a result, it is the best choice for decorative aluminum expanded metal.
It is a resin-based liquid coating system that takes polyvinylidene fluoride (PVDF) as the spraying material. It features excellent weather resistance, acid and alkali resistance, heat resistance, cold resistance, self-extinguishing, self-lubricating, radiation resistance, etc. It also shows long-lasting resistance to fading and anti-UV performance especially in the harsh climates and environments. So it enjoys a service life of 3-5 times of ordinary coatings.
In addition, our PVDF coating process adopts multiple layers of coating, including primer, paint and varnish. It conforms to American Architectural Manufacturers Association AAMA-605.02.90 standards on PVDF coating and provides a finish with perfect combination of best practicability and aesthetic. So, it becomes an ideal choice for high-end decorative aluminum expanded metals.