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  • The appearance quality of cold-drawn low carbon steel wire in each inspection lot shall be all visually inspected. The appearance of steel wire shall not have cracks, burrs, corrosion and mechanical damage affecting mechanical function. Cold-drawn low carbon steel wire with unqualified appearance can be used in engineering after treatment and inspection.

  • The management system of the rinsing water after the steel wire pickling should be regularly and regularly discharged after the rinsing water, and the rinsing water should be kept clean and low acid value as far as possible. The pH control is more appropriate. The concentration of plating aid should not be too high. Hot plating wire must be added ammonium chloride and zinc chloride according to the data of laboratory analysis, and the specific gravity of the composite solution is controlled in the range of 50~80g/L. The addition of ammonium chloride or zinc chloride raw materials without the results of laboratory analysis shall be subject to criticism and education, and economic treatment if necessary.
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