qualification standard for galvanized iron wire
let us take a look, what are the qualification standards for galvanized wire!
Appearance inspection requirements: All casting surfaces should be clean, non-damaging, smooth, no nodulation, zinc ash and iron.
Qualification standards for repair testing: The plating parts that fail the appearance inspection shall be repaired. The repair standard shall not exceed 0.5% of the total area, and the unit area of each repair point shall not exceed 1dm2, otherwise the parts shall be reheated.
Eligibility criteria for adhesion strength: The hot-dip galvanized layer of the hot-dip galvanized part should have sufficient adhesion strength, and the coating should not peel off when there is no external stress to bend or deform the plated part.
Note: A very small amount of storage and transportation spots on the surface of hot-dip galvanized product parts should not be used as a reason for rejection.
Presumably, we understand that the qualification standards for galvanized wire have contributed to your inspection. Only the galvanized wire can be produced in strict accordance with the qualified standards to produce the highest quality galvanized iron wire
The duration of the galvanizing protection of the galvanized iron wire is highly dependent on the thickness of the coating.
Generally, the thickness of the galvanized layer needs to be high in a relatively dry main gas and in indoor use, and in a relatively harsh environment. Therefore, the influence of the environment should be considered when selecting the thickness of the galvanized layer.
After passivation of the galvanized layer, a layer of bright and beautiful color passivation film can be formed, which can significantly improve the performance of the paddle decoration performance.
There are many kinds of galvanizing solutions, which can be divided into cyanide plating solution and cyanide-free plating liquid according to their properties.
The cyanide galvanizing solution has good dispersing ability and covering ability, and the plating layer has smooth and fine crystal structure, simple operation, wide application range, and long-term use in production. However, because the plating solution contains highly toxic cyanide, the gas escaping during the electroplating process is harmful to workers' health. Its wastewater must be treated strictly before discharge.