Difference between plastic coated pipe and galvanized steel pipe
Plastic coated pipe
Plastic coated pipe is the pipe as the matrix, through a special process in the inner wall of the molten coating or adsorption food grade epoxy powder coating or PE raw material of high temperature curing of the new composite materials. Has excellent corrosion resistance and a relatively small frictional resistance. Epoxy coated steel pipe for drainage, water, warm water, oil, gas and other media delivery, polyvinyl chloride (PVC) plastic pipe for drainage, water, oil, gas and other transmission medium. The coated pipe is the use of PE (modified polyethylene) for hot dip or EP (epoxy) coated products inside and outside, with excellent corrosion resistance. At the same time the coating itself also has good electrical insulation, does not produce electrical erosion. Low water absorption, high mechanical strength, low coefficient of friction, to achieve the purpose of long-term use. Can effectively prevent the plant roots and soil damage and other environmental stress. The product is easy to connect, easy maintenance.
The molten matrix metal and react to produce iron alloy layer, so that the substrate and coating combination of both. Hot-dip galvanized steel pickling is the first, in order to remove the surface oxide steel after pickling, by ammonium chloride or zinc chloride and zinc chloride aqueous solution or mixed aqueous solution tank for cleaning, and then into hot-dip plating bath. Hot-dip galvanized with coating uniformity, strong adhesion, long life and other advantages. Hot-dip galvanized steel substrate occurs with molten bath complex physical, chemical reactions, the formation of corrosion-resistant zinc-iron alloy compact structure layer. Alloy layer and layer of pure zinc, steel base blend. So the corrosion resistance ability. Therefore: it do not do basically two kinds of steel surface treatment (paint, anti-rust oil).