Large-sized steel structures, which cannot be immersed in a bath and subject to hot galvanization, are secured using metal spraying technique. We offer complex services concerning metal spraying which consists of: abrasive blasting of steel structure, thermal spraying of metal coating, sealing the spraying coating with paint.
This method is used to secure large bridge elements and other structures of maximum dimension: length 28 m, width 4.8 m, height 2.8 m and maximum weight 20 tonnes. Thermal spraying is made using special devices for metal spraying.
Applying the protective coating consists in atomizing molten coating metal using stream of compressed gas (usually air) to very fine particles, which when falling in malleable condition on properly prepared surface, overlap one another and form sprayed coating.
In order to obtain good quality of sprayed coatings, it is necessary to accurately clean the coated surface to min. S.A. 2.5 and proper roughness of the surface: Rz 60-100µm. This can be ensured by abrasive blasting. Thickness of metal coating obtained with the metal spraying method is within 50 to 300 µm.