A coat of zinc, alluminum or similar metal (as an intermediate operation between blasting and painting) is applied to add substantially to anticorrosive protection. This process is called thermal spraying metallization.
Thermal spraying is a process using a wire-shaped metal semi-product in which the metal coating material is melted by an oxygen/acetylene torch flame surrounded by air. The gases coming out of the spray gunís nozzle at a high speed atomize the melted metal to form tiny particles, which are thrown against the surface of the work-piece at high speeds.
Thermal spraying is primarily designed for anticorrosive coatings, most often using zinc or alluminum systems. Thermal spraying fully replaces, and in some applications surpasses, zinc dipping. No drilling of discharge openings is necessary. The only drawback is the need to apply a final sealing coat system. Applied onto a steel construction, zinc is slightly rough. It is touch and dirt sensitive. A thermal spray coating should be provided with a final sealing coat within 4 hours of thermal spraying. This type of metal coating is mainly used in Germany and in maritime countries. Anticorrosive protection is extended by as many as 14 years, or even more, depending on spraying technology used (expressed as coat thickness in microns). This technology makes it possible to metallize any parts and surfaces regardless of their dimensions, in contrast to zinc dipping (maximum sizes in the Czech Republic being 9 meters).
All jobs are performed in compliance with the ISO 2063/99 standard.