Do You Know The Characteristics Of Galvanized Pipes?

(1)Unique clean production
The galvanized pipe adopts the sulfate electroplating process of zinc-iron alloy, which means that there are direct perforations between the production line troughs and the troughs without any carry-out or overflow of the solution. Each process of the production process is composed of a circulation system. The solutions in each tank, namely acid and alkali solution, electroplating solution, light extraction and passivation solution, etc., are only recycled and not leaked or discharged outside the system. The production line only has 5 cleaning tanks, which use circulation. Reuse and discharge regularly, especially in production processes that do not produce wastewater without cleaning after passivation.
(2) The particularity of electroplating equipment
The electroplating of galvanized pipes and electroplating of copper wires are the same as continuous electroplating, but the plating equipment is different. The plating tank is designed with the slender strip shape of the iron wire. The tank body is long, wide but shallow. During electroplating, the iron wires pass through the holes and spread out on the liquid surface in a straight line, keeping the distance between them. However, galvanized pipe is different from iron wire in that it has its own unique features and the tank equipment is more complicated. The tank body is composed of upper and lower parts. The upper part is the plating tank and the lower part is the solution circulation storage tank, forming a trapezoid-like tank body that is narrow at the top and wide at the bottom. There is a channel for galvanized pipe electroplating operation in the plating tank. There are two through holes at the bottom of the tank that communicate with the lower storage tank, and form a plating solution recycling system with the submersible pump. Therefore, galvanized pipes are the same as iron wire electroplating, and the plated parts are dynamic. However, unlike iron wire plating, the plating solution for galvanized pipes is also dynamic.
(3) Optimization of sulfate galvanizing
The advantages of sulfate galvanizing are that the current efficiency is as high as 100% and the deposition rate is fast, which is unmatched by other galvanizing processes. Because the crystallization of the coating is not fine enough, the dispersion ability and deep plating ability are poor, so it is only suitable for plating pipes and wires with simple geometric shapes. The sulfate electroplating zinc-iron alloy process optimizes the traditional sulfate galvanizing process. Only the main salt zinc sulfate is retained, and the remaining components are discarded. An appropriate amount of iron salt is added to the new process formula to form a zinc-iron alloy coating from the original single metal coating. The reorganization of the process not only brings forward the advantages of high current efficiency and fast deposition rate of the original process, but also greatly improves the dispersion ability and deep plating ability. In the past, complex parts could not be plated, but now both simple and complex parts can be plated, and the protective performance is also 3 to 5 times higher than single metal. Production practice has proven that when used for continuous electroplating of wires and pipes, the coating grains are finer and brighter than the original ones, and the deposition rate is fast. The coating thickness reaches the requirement within 2 to 3 minutes.
(4) Conversion of sulfate zinc plating
Sulfate electroplating of zinc-iron alloy only retains zinc sulfate, the main salt of sulfate zinc plating. The remaining components such as aluminum sulfate, alum (potassium aluminum sulfate), etc. can be added to the plating bath during treatment to generate insoluble hydroxide precipitation. Remove; for organic additives, add powdered activated carbon to remove them by adsorption.
Tests by galvanized pipe manufacturers have shown that aluminum sulfate and potassium aluminum sulfate are difficult to completely remove at one time and have an impact on the brightness of the coating, but it is not serious and can be taken out for consumption. At this time, the brightness of the coating can be restored through treatment with the solution. Add the required ingredient content according to the new process to complete the transformation.