Electric Arc Wire Spray

Electric arc wire spraying

Overview:

Arc spraying is a technology that uses an electric arc burning between two continuously fed metal wires to melt metal, atomizes the molten metal with a high-speed airflow, and accelerates the atomized metal particles to spray them to the workpiece to form a coating. . The arc spraying system is generally composed of a special power supply for spraying, a control device, an arc spray gun, a wire feeder and a compressed air supply system.

Effect:

Arc spraying long-lasting anti-corrosion composite coating refers to the composite coating of arc spraying metal coating and sealing coating. Arc spraying metal coatings mainly include arc spraying zinc, aluminum and their alloy coatings. The sealing coating includes sealing bottom and sealing Middle layer and closed surface layer. The anti-corrosion principle of the long-lasting anti-corrosion composite coating of arc spraying on the steel substrate is the combined effect of physical shielding and cathodic protection. The main function of the seal coating is to physically isolate the corrosion of the metal spray coating and the steel substrate by various corrosive media. The layer provides cathodic protection of the steel substrate at the expense of protecting the steel. The composite coating formed by the sealing treatment after spraying zinc or aluminum has a corrosion resistance that is 50~130% higher than the sum of the corrosion resistance life of the zinc or aluminum coating and the sealing coating. This effect is called the best synergy effect (the life expectancy formula of SynergyEffect arc spraying long-term anticorrosive composite coating is: composite coating anticorrosion life = (aluminum spray coating life + closed coating life) × 1.5 ~ 2.3 .

Spraying materials:

There are different forms of powder, wire, ribbon and rod, and their components are metals, alloys, ceramics, cermets and plastics. Powder materials occupy an important position, with more than one hundred types. Wires and strips are mostly metals or alloys (composite wires still contain ceramics or plastics); there are only a dozen kinds of rods, most of which are oxide ceramics. Arc spraying materials are generally wire, such as zinc wire, aluminum wire, aluminum alloy wire (Ac aluminum, AS aluminum), copper wire, etc. Powder materials are mainly used for flame spraying.