The service conditions and service life of electrogalvanized iron wire or component are closely related to the thickness of electroplating layer. The more strict the use conditions and the longer the service life of hot plating wire, the thicker the electrogalvanizing wire layer required. Different products, according to the specific environment to determine the expected service life of the electroplating thickness, blind thickening will cause all kinds of waste, but if the thickness is insufficient, and will not reach the expected service life requirements.
Different manufacturers according to their own equipment conditions, in the case of determining the type of plating, to prepare a more complete and reasonable process, clear electroplating parameters, control the concentration of electroplating solution, standardized operation. Plating post treatment for enhanced protection, decoration and other special purposes. After galvanizing, chromate passivation or other conversion treatment is generally carried out to form the corresponding type of conversion film, which is one of the key processes to ensure the quality of the plating.
Galvanized wire galvanizing process: stress elimination before plating where the tensile strength is greater than 1034Mpa key, important parts before plating should be at 200±10℃ to eliminate stress for more than 1 hour, carburizing or surface hardening should be at 140±10℃ to eliminate stress for more than 5 hours. The cleaning agent used for cleaning should have no effect on the binding force of the coating and no corrosion to the matrix. Acid activation Acid activation liquid should be able to remove rust products on the surface of parts, oxide film (skin), no over corrosion to the matrix.
Zinc plating can be zinc plated with zincate or chloride, suitable additives should be used to obtain a coating that meets the requirements of this standard. After light plating, light treatment should be carried out. Passivating parts that need to be dehydrogenated should be passivated after dehydrogenation. Before passivating, 1%H2SO4 or 1% hydrochloric acid should be activated for 5~15s. Passivation shall be done with chromate color unless otherwise specified on the design drawings.
The wide application of galvanized wire has brought great convenience to people’s production and life, but the production process of iron wire is not to be underestimated. In industrial production, the production process of galvanized wire should be strictly controlled to ensure the quality of galvanized wire.
Post time: 19-10-21