galvanized iron chain good for your project
Galvanized iron chain is the reaction of molten metal and iron matrix to produce an alloy layer, so that the matrix and the coating are combined. Galvanized iron chain is the first chain for pickling, in order to remove the iron oxide on the surface of the chain, after pickling, through ammonium chloride or zinc chloride aqueous solution or ammonium chloride and zinc chloride mixed aqueous solution tank for cleaning, and then into the hot dip plating tank. Galvanized iron chain has the advantages of uniform coating, strong adhesion and long service life.
Galvanized iron chain is hot dip galvanized on the basis of welded iron chain (that is, the zinc is dissolved in the zinc pot, and then the chain is immersed in liquid zinc for a period of time to take out, and then cooling and drying).
The inner and outer walls of the chain have a zinc layer attached at the same time. Galvanized iron chains are generally used for conveying low pressure fluids (i.e. water, liquid gas).
The physical properties of ordinary chains and galvanized chains are the same, but because the surface coating is different, their corrosion resistance is not exactly the same.
One, common chain: chromium is a silver color metal, it is very stable in the atmosphere, even in alkali, nitric acid, sulfide, carbonate solution can also maintain a stable state. Chrome has a hard texture, strong wear resistance, and can keep its luster for a long time. The disadvantage of chromium plating is that it does not protect the base metal from rusting. It is therefore preceded by a coating of copper or copper-tin alloy that binds well to the base metal. In general, chrome-plated chain has the characteristics of a slightly higher cost, domestic high-grade cars, portable cars mostly with it, generally not recommended to use.
Two, galvanized chain: galvanized chain appearance for the green color. That is the result of passivation of zinc coating followed by bleaching. The zinc coating changes little in dry air. In moist air, in water containing carbon dioxide and oxygen, its surface forms a thin film of the main basic zinc carbonate. This film has the effect of corrosion inhibition. Can prevent further corrosion of metal. We see that some galvanized chains change from white to brown very quickly after use, but there is no greater change after this, the reason is that.
Compared with ordinary chains, galvanized chains in production and processing after special galvanized treatment, in the use of more excellent characteristics, so that whether from the life of the product or the actual use of the above has different degrees of improvement. Galvanized process is relatively simple, the cost is relatively low, so ordinary type, heavy bicycle are used with it.
