Application Of Galvanized Steel Wire

Galvanized steel wire is mainly used for planting greenhouses, breeding farms, cotton packaging, manufacturing of springs and steel wire ropes. Suitable for engineering structures with harsh environmental conditions such as steel cables and sewage tanks in cable-stayed bridges
Uniformity of zinc layer
The uniformity of the zinc layer affects the corrosion resistance and service life of the product, and should be included in the standard for testing and assessment. Usable coating uniformity η Evaluate the uniformity of the coating by measuring the average thickness H and standard deviation S. Necessary measures should be taken to improve the uniformity of the galvanized layer during the hot-dip galvanizing process
The quality of the galvanized layer can be evaluated by the weight of zinc deposited on the substrate, the adhesion between the galvanized layer and the substrate, and the uniformity of the coating. The uniformity of the zinc layer is an important quality indicator of the galvanized layer. In general, corrosion always starts at the thinnest point of the zinc layer and spreads to the surrounding areas, leading to rust, wire breakage, and affecting the service life. For the weight and adhesion of coatings, each standard has clear regulations, but there are differences in uniformity. In the 1970s, ISO standards and standards from various countries around the world generally stipulated the use of copper sulfate test for inspection. By the 1980s, except for Japan and the former Soviet Union, ISO standards and standards from various countries around the world no longer used this method. Although some standards in China, such as GB/T15393-94 "Galvanized coating on steel wires", still retain this method in the form of "mutual agreement", most of them are no longer used. However, the old zinc layer uniformity testing method has been abandoned without establishing a corresponding new method, and there is no unified definition and requirement for uniformity, which has led to some producers not monitoring and testing the uniformity of the coating well, thus affecting the further improvement of product quality