Rusty manhole covers how should I do? Gu Chang-year foundry to your Weapon: spray rust: is the use of oil-water separator treated by compressed air from the abrasive high-speed spray nozzle five anti-covers, compressed air pressure is generally Zhang 4-0.6MPa, using a belt pressure of the high-speed mushroom friction material and ductile iron manhole covers and shock on contact to remove oxide and corrosion. This method does not need a fixed location covers five anti-production, high efficiency, flexibility, large injection point five anti covers wholesale, no dead ends, in addition to good quality pound, while the ductile iron covers the surface to obtain a certain roughness to facilitate the film attachment, this method should be generally adopted. Gu Chang-year foundry with you to explain what is heat-treated cast iron covers: Heat cast iron covers the use of heating and cooling methods, regularly changing the iron core body tissue, so that it has obtained the appropriate organizational performance, to satisfy the conditions required for a particular job, such as high strength, hardness, wear resistance, good summary ductility, toughness and so on. Our Address: Taigu County towns Hu Dong village crossing State Road 108. Five Anti covers manufacturers _ _ Chang Jincheng covers five-year anti-foundry provided by Gu Chang in foundry. Gu Chang-year foundry (www.sxcnzz.com) strong, credible, in Jinzhong machining industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Chang and you work in the foundry into the brilliant, for a better future!