The duration of the protective effect of the galvanized layer of the large roll galvanized wire has a great relationship with the thickness of the coating. Generally speaking, in relatively dry main gas and indoor use, the thickness of the galvanized layer is only 6-12μm “, and in harsh environmental conditions, the thickness of the galvanized layer needs 20μm “. Therefore, the environmental impact should be considered when selecting the thickness of galvanized layer.
After passivation treatment, a bright, old and beautiful color passivation film can be formed, which can significantly improve its protective performance. There are many kinds of galvanizing solutions, which can be divided into cyanide plating solution and non-cyanide plating solution according to their properties. Cyanide galvanizing solution has good dispersion and covering ability, smooth and fine coating crystallization, simple operation, wide application range, and has been used in production for a long time.
However, because the plating solution contains highly toxic cyanide, the gas escaping in the plating process is more harmful to the health of workers. Its waste water must be treated strictly before discharge. Galvanized iron wire has good corrosion resistance and rust resistance, so it can be prevented from being used in some outdoor guardrail or fence, especially on handicrafts, which are also very useful, and the surface of galvanized iron wire is not easy to rust and oxidation.
Post time: 15-04-24