If the zinc coating is good, but when the light comes out in 3% nitric acid, there is a dark shadow on the coating, and the film is brown when passivation occurs, which may be caused by foreign metal impurities such as copper or lead in the galvanized liquid. When there is a problem in the process of galvanizing, check the temperature and current density first, and then measure and adjust the content of zinc and sodium hydroxide in the bath through the analysis of the bath. Whether DPE levels are low can be determined by Hull cell test.

In order to orchard special electric galvanized shaft wire in alluvial surface to partially remove the surface film layer, surface impurity and other shortcomings can be found and solved according to the basic technology; Excessive foam is caused by soap and soapable surface active substances such as human fat into the tank. A moderate rate of foam production would be fine. The large amount of fine homogeneous particles in the tank can stabilize the foam layer, but the accumulation of too much solid particles will cause explosion.

Wire factory reminds you in the purchase of galvanized wire, should be stored in dry, ventilated conditions, do not contain corrosive gases, do not mix with organic volatile gas produced paint, plastic and other substances in a good environment. If possible, we can add reliable inner packaging for galvanized parts, and put desiccant. If the zinc layer of white spots and long hair, can only be removed by mechanical methods, and then normal passivation, or completely washed off the zinc layer after re-plating.

1. Zinc pot operators must stick to their posts

In the process of composite plating, it is necessary to stir the plating solution to obtain the composite coating in which the particles dispersed in the matrix metal. Stirring methods include mechanical stirring, air stirring, ultrasonic stirring, bath circulation, etc. In the process of production, the acid activation solution can remove the corrosion products and oxide film on the surface of low carbon steel wire without excessive corrosion on the matrix. Galvanized wire can be used zincate galvanized or chloride galvanized and other processes, appropriate additives should be used to obtain the coating required by the standards of low carbon steel wire.

1. The diameter of the raw material and the thickness of the diameter are directly affected;

Moderate rates of foam formation may be harmless. The presence of small, homogeneous particles of large denier in the tank can stabilize the foam layer, but the accumulation of excessive solid particles can cause an explosion.