Hot-dip galvanizing in Nizhny Novgorod
Treatment of steel products with heated zinc has been and remains the most popular procedure to prevent corrosion of the metal. The prevalence of the method in construction and industry is provided with a high degree of protection against rust while maintaining heat and energy conductivity. For large enterprises that work with large volumes of production, the method is also cost-effective. Metal structures protected by this technology can be used in urban construction (power line supports, bridge structures, railings). It is acceptable to use the method to strengthen household utensils – dishes, tanks or pipes.
Hot dip galvanizing in Nizhny Novgorod is carried out in several stages. The first step is to perform the preparatory procedures. These include thorough cleaning of oils, grease, rust and washing. Be sure to dry to prevent poor-quality processing result. Particular attention should be paid to the parts of the structure in which there is a thread or bolts. They become an additional source of corrosion. After performing the necessary procedures, the workpiece is dipped into a liquid mass heated to 450 degrees. With proper preparation, the solution should fill the pores in the structure of the steel part as much as possible. The technology assumes that after the end of processing zinc will continue to penetrate into the metal. On average, the rate of penetration of the alloy into the material is 2 mm. per year.
To ensure a really strong and durable coating should take into account the requirements of GOST 9.307. Special attention is paid to checking the fixation strength of the protective layer and material. This can be done in different ways:
- application of dyeing. Special brass brushes, rotating at a speed of up to 2800 rpm, paint the steel. This should be done for 30 seconds and checked for blisters or flakes;
- for the purpose of check put scratches by means of the special adaptation. On a site leave 5 scratches in parallel to each other and 5 perpendicularly, forming similarity of a lattice. If at this point the protective composition is not exfoliated, the quality of processing can be considered good;
- over the degreased and cleaned surface of set check hammer weighing 212.5 grams, after which the hammer is lowered twice. The absence of defects – the value of a job well done with steel;
- products are kept for 60 minutes at a temperature of 200 degrees and cooled. If the coupling compound and the surface of the solid, then the details will not appear bloated or cracked.
Properly executed hot-dip galvanizing in Nizhny Novgorod will provide a high degree of protection of the metal structure. The product can be used in any environment, except for acid and alkaline.