Galvanized pipe is divided into hot dip galvanized and cold galvanized what is the difference

First, the concept of hot galvanizing and cold galvanizing

Galvanized pipe is a pipe that is plated with a layer of zinc in order to prevent corrosion, and the galvanizing process is divided into hot galvanizing and cold galvanizing. Hot-dip galvanizing is made by soaking the prepared steel pipe through molten zinc water, while cold galvanizing is made by uniformly adhering zinc to the surface of the steel pipe through electroplating.

Second, the difference between hot galvanizing and cold galvanizing

1. Process

Hot dip galvanizing is carried out at high temperatures, and the prepared steel pipe is soaked in melted zinc water to form a stronger coating and a longer service life. Cold galvanizing is carried out at room temperature, and the zinc is uniformly attached to the surface of the steel pipe by electroplating. This process reduces energy waste and environmental pollution.

Step 2: Appearance

Hot dip galvanized coating is thick, high gloss, the common surface is red rust color. The cold galvanized coating is relatively thin, the gloss is poor, and the common surface is slightly gray. In appearance, hot-dip galvanizing is more beautiful.

3. Scope of use

Hot dip galvanized coating thicker, more corrosion resistance, often used in water pipes, gas pipes and other industrial pipelines. Cold galvanizing is often used in the manufacture of cable Bridges, wire components and other fiber products, because the anti-corrosion performance is worse than hot dip galvanizing, so it needs to be used in a relatively dry environment.

Iii. Summary

Although hot galvanizing and cold galvanizing are different in process, appearance and scope of use, they have the same point is that they can effectively prevent corrosion of steel pipes. The user should choose the appropriate type of galvanized pipe according to different use scenarios to ensure that it has a longer service life.