Large roll galvanized wire with high quality low carbon steel wire processing, continuous rolling mill rolling rod each is not less than 200kg, but allow each batch of 15% of the number of disks composed of two, the weight of each root shall not be less than 80kg, and allow each batch of 4% of the number of disks, the single rod mass is less than 200kg, but not less than 40kg. Each rod of semi-continuous rolling mill shall not be less than 60kg, and the mass of the rod shall not be less than 60kg, but not less than 30kg, if 5% nitrogen is allowed in each batch.
Each wire plate shall consist of one wire. The surface of the wire rod shall be free of cracks, folds, scarring, ears, delamination and inclusion. However, it is allowed to have indentation, pits, bumps, scratches, pockmarked surface, the depth or height should not be less than 0.2mm. The steel wire surface should not be corroded and oxide skin, after heat treatment test allowed oxidation color. The surface of the steel wire is allowed to have scratches not exceeding half of the allowable diameter deviation range and local defects not exceeding the allowable diameter deviation range.
Raw materials with qualified quality should be marked for reference when used. In order to remove the surface film layer, surface inclusions and other defects on the surface of the large roll galvanized wire in the deposition layer to the local surface can be found and treated by conventional technology; Excess foaming is caused by the introduction of surfactants such as soap and saponifiable fats into the bath. A moderate rate of bubble formation may be harmless. The existence of large denier small homogeneous particles in the bath can stabilize the foam layer, but excessive accumulation of solid particles will cause an explosion.
Surface active substances are removed by matting with activated carbon. Or by filtering the foam to make it less stable, both are effective measures; Other measures should also be taken to minimize the introduction of surfactant. The introduction of organic matter can reduce the electroplating speed obviously. Although the chemical formulation is conducive to high deposition rate, the coating thickness can not meet the requirements of organic matter, so activated carbon can be used to treat the bath.
Post time: 22-07-21