Lysbuesprøyting

Lysbuesprøyting, also known as arc spraying, is a thermal spraying process used to apply metallic coatings. In this method, two consumable electrodes, typically wires made of the coating material, are fed into a spray gun. An electric arc is struck between the tips of these wires, generating intense heat that melts the electrode material. Compressed air is then used to atomize the molten metal and propel it towards the substrate, forming a protective or functional coating.

The process is versatile and can be used to deposit a wide range of metals and alloys, including zinc, aluminum, stainless steel, and copper. Lysbuesprøyting is particularly effective for corrosion protection, as the deposited metallic coatings, such as zinc and aluminum, provide sacrificial protection to the underlying substrate. It is also used to impart wear resistance, electrical conductivity, or thermal insulation properties.

Key advantages of lysbuesprøyting include its relatively high deposition rates and the ability to spray thick coatings. The process can be applied to large structures and complex geometries. The equipment is generally portable, allowing for on-site applications. However, the process can produce some porosity in the coating, and careful control of parameters is necessary to achieve optimal coating properties. The surface of the substrate typically requires cleaning and preparation, often through grit blasting, to ensure good adhesion of the sprayed coating.