Cold galvanized pipe VS hot galvanized pipe, which galvanizing method is better

First, hot-dip galvanized pipe

Hot-dip galvanized pipe is a method of galvanizing ordinary steel pipes by soaking them in preheated zinc solution. The process temperature of hot-dip galvanized pipe production is high, about 460 ° C, so the zinc layer of hot-dip galvanized pipe is thicker than that of cold galvanized pipe, which can prevent corrosion well. At the same time, the surface of the hot-dip galvanized pipe is smooth and beautiful, which is not easy to produce zinc oxide (white rust) and has a long life.

However, the price of hot-dip galvanized pipe is relatively high, and the production process is also more serious environmental pollution.

Two, cold galvanized pipe

Cold galvanized pipe is sprayed on the surface of the steel pipe with a layer of high zinc content of the coating, and then use a chemical reaction to produce an electrochemical reaction with the surface of the steel pipe to form a protective layer, so as to achieve the effect of anti-corrosion. Generally speaking, the zinc layer of cold galvanized pipe is thinner than that of hot galvanized pipe, but because the production process of cold galvanized pipe does not require high temperature, it is also relatively small in environmental pollution.

The price of cold galvanized pipe is relatively low, it is not easy to appear zinc oxide (white rust), and the service life is relatively long, but compared with hot galvanized pipe, the corrosion resistance of cold galvanized pipe is weaker.

Three, which is better?

From the above introduction, it can be seen that cold galvanized pipe and hot galvanized pipe have advantages and disadvantages, and the specific choice of galvanized pipe should be determined according to the specific use scenario and needs. If the requirement of corrosion resistance is relatively high, you can choose hot galvanized pipe, if the price and environmental protection requirements are more important considerations, you can choose cold galvanized pipe. Of course, in the actual selection process, it is also necessary to consider the comprehensive factors of various factors in order to achieve the best use effect.

As a commonly used metal pipe, galvanized pipe has been widely used in the market. The advantages and disadvantages of the two galvanized pipes have their own advantages and disadvantages, and the choice of galvanized pipes should be determined according to the specific use scenario and needs. It should be noted that when purchasing, we must choose high-quality products produced by regular manufacturers.