Galvanized iron wire testing report and laboratory testing
How to intuitively distinguish the quality of galvanized iron wire products
I believe everyone has some understanding of galvanized wire. Can you distinguish the quality of galvanized wire when using and purchasing it? How to select the quality of galvanized wire.
Firstly, the surface coating of high-quality galvanized wire should be continuous and smooth. During the installation and bonding of the plated parts, there should be no sagging, slag or dripping, and there should be no defects such as exposed iron on the surface. Good quality galvanized wire must have a uniform coating, soaking approximately five times in copper sulfate solution without exposing iron.
Use a hammer to strike the test without protrusion or detachment. This is the characteristic that good galvanized wire should possess.
Galvanized wire can be divided into hot-dip galvanized wire and cold galvanized wire (electroplated zinc wire). The difference is that hot-dip galvanized wire is dipped in heated and melted zinc solution, with fast production speed and uneven coating thickness. The minimum allowed thickness in the market is 45 microns, and the maximum can be over 300 microns.
The color is darker, consumes more zinc metal, forms an infiltration layer with the base metal, has good corrosion resistance, and can be maintained for decades by hot-dip galvanizing in outdoor environments. Cold galvanizing (electro galvanizing) is a process in which zinc is gradually coated onto the metal surface through unidirectional current in an electroplating bath. The production speed is slow, the coating is uniform, the thickness is thin, usually only 3-15 microns, the appearance is bright, the corrosion resistance is poor, and it usually rusts after a few months. Compared to hot-dip galvanizing, the production cost of electrogalvanizing is lower.
