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Corrosion And The Importance of Hot GalvanizingAlmost for all metals, the reasons for corrosion and its mechanism of formation is the same. Where the main reason and mechanism of formation are based on electro-chemical basis, the changing parameters are the characteristics and the density of the effects over different metals.
The formation of corrosion; for the raw material from where TEKOM cable trays are produced of which is steel, starts with the rusting which is the result of different atmospheric conditions and results with the accelerated rate over unprotected surfaces.
Various reasons appearing directly because of chemical effects or because of the electrochemical results of contact of same or different metals corrosion may arise. In short, formation of corrosion is a simple reaction; however the important issue is the effects of corrosion over and around the material. In this case, steel materials are corroded by losing their physical, chemical, electrical and other characteristics affecting from the atmospheric conditions where they are. Those changes mean in a manner that the steel becomes rusty.
Becoming rusty of the steel is not only a visual defect, but also a chemical reaction which is corrosive to the metal.
The surface of the steel should be treated with protective methods to get rid of the corrosive effects of the environment. Some of such protective methods are painting, coating with plastics, nickel, chrome, copper and zinc. However, whether in painting or in coating with plastics, the damaged sections of the steel will become rusty and this rust will remove the coating anyhow. Those kinds of coatings are not LONG LASTING and RELIABLE. Also they always need maintenance. In the other type of coatings the shape of the rust is like a hallow going through the material. The best and logical solution to protect the steel materials against corrosion is, coating them with HOT-DIP GALVANIZING method.
All the materials (excluding the bolts, nuts, washers etc. and pregalvanized series materials) in our catalogue named as “CABLE SUPPORT SYSTEMS”, are coated with hot-dip galvanizing method.
With this type of coating in accordance with TS 914 EN ISO 1461, the steel material whose final shape is given by welding, is dipped to a molten zinc bath and a protective coating on the surface, which is a zinc-iron alloy, is obtained against corrosion.
Among the zinc coating methods of steel, the best and the long lasting protective method one is the HOT-DIP GALVANIZING. In hot-dip galvanizing method, all the surfaces of the material, which is dipped to the molten zinc, even to the most critical points (sharp edges, cut corners, holes) are coated completely with zinc.
The zinc coating, that has a bright view at the first times, will later ha ve a protective layer with a dull gray color.
In hot-dip galvanizing, as the rate of corrosion of zinc is so slow, the life of the coating will be longer. Besides, as the zinc is anodic to the steel; as a conclusion of alloying of zinc with the iron, the CATHODIC PROTECTION will occur. Due to this characteristic of zinc, a protective zinc layer is established on the sections where the materials are damaged or cut. Cathodic protection will last until all the zinc is completely consumed.
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