welded wire mesh sizes for concrete

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  • Large roll galvanized wire is processed by low carbon steel wire rod, through drawing molding, pickling rust removal, high temperature annealing, cooling and other processes. Large roll galvanized wire electroplating temperature should be controlled in 30-50℃. Because of the strong corrosivity of chloride ions in bath, quartz glass heater is generally used. Continuous production does not need heating, but need cooling cooling.

  • Great attention should be paid to pickling of large rolls of galvanized wire. Acid is highly corrosive. Therefore, when adding acid, the acid must be poured into the water, and it is along the wall of the cylinder, and not thrown down at once, so as not to cause splashing. Remember the order of acid pouring, acid into water rather than water into acid, water into acid will cause splashing and boiling, when pouring acid must wear protective glasses, beside must ensure that there are no non-professional people watching, so as not to cause some acid splashing danger.

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  • The coating on the surface of the welding core is called the coating. The coating of electrode plays a very important role in the welding process. If the photoelectrode without drug skin is used for welding, in the welding process, oxygen and nitrogen in the air will invade a large number of molten metal, metal iron and beneficial elements such as carbon, silicon, manganese oxidation and nitriding to form various oxides and nitrides, and residual in the weld, resulting in slag inclusion or cracks in the weld. The gas in the weld pool may produce a large number of pores in the weld. These factors can greatly reduce the mechanical properties of the weld and make it brittle.

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