Galvanic zincing is a relatively easy and convenient technology, but the processes occurring in metals are quite complicated. The alloy coat is generated only if the surface is chemically clean, that is why it should be degreased and deoiled. Protective layer fuses with the steel surface with the help of forming steel/zinc alloy. This layer protects steel electrochemically and forms solid, durable coat, which is safe even in case of strong impacts, since the back layer is fused with the steel surface. If the damage is still done, then zinc electrochemically still protects steel – “sacrificing” itself to the steel to the last atom, even from the certain distance. In case only the thinnest zinc layer is left, no technical service is needed to preserve the structural integrity of the steel underlayer. There is no other coating that can protect product this way, but zinc. In addition, the final products of zinc corrosion are solid and impact proof, but zinc oxides and carbonates increase further corrosion. The useful life of the coating is from 25 years and longer, depending on coat thickness, work environment, climate and additional coating (paint). In our region and agricultural zones metal constructions processed this way can serve up to 65 years. Though, it should not be forgotten that in industrial regions with their acid rains and the like the products useful life may last only for 20 years. This is why zinc coating is not recommended as an anti acid protection of steel (including acid soil). According to the acid and alkali tables it is advisable to use zinc protected products within the range from pH 5,5 to pH 12,5. The coating is indifferent to the majority of organic compounds, solvents, petrol, diesel oil, oils, varnish and similar products. It is possible to paint the zinc galvanized products at later stage if it is needed to improve the outlook. The customers can paint the products themselves, we recommend to use special grounding and to paint not sooner than 1 week after galvanization, because in process of oxidation knobs may form on the surface. Painting adds protection to the zinced product resistance against environmental impacts, extends useful life and which is most important -protects the structure against acid effect. The maximum effect is achieved with powder coating technology. A/S EF “JAUDA” offers: - Galvanic zincing
While immersing the products into liquid zinc, the surfaces are evenly covered, including interior surface of the tube like products. According to European standards the average thickness of zinc coat should be not less than 85 microns. Our equipment ensures coat thickness from 100 to 150 microns. Maximum steel product size 1250x750x250 mm. |  |
