Galvanized pipe corrosion resistance

1, galvanized pipe is the iron pipe through the hot dip galvanized process to form a layer of corrosion resistant zinc layer. The zinc layer has good anti-corrosion performance, can effectively isolate the contact between the iron material and the external environment, and extend the service life of the pipe.

2, the zinc layer can form a physical protective layer, which can effectively resist the erosion of acid, alkali, salt and other chemical substances, so that the galvanized pipe can have strong corrosion resistance in a variety of harsh environments.

3, galvanized pipe also has self-healing properties, that is, when the surface of the zinc layer is damaged, the iron matrix part will react with the surrounding zinc, forming a new zinc layer, thus ensuring the overall long corrosion protection life of the pipe.

The structure and type of galvanized pipe

1, the structure of galvanized pipe is mainly composed of inner and outer two layers, the inner layer is zinc iron alloy layer, the outer layer is pure zinc layer. This double-layer structure has high corrosion resistance under the action of external corrosion.

2, according to different production processes, galvanized pipe can be divided into hot dip galvanized pipe and electric galvanized pipe two types. Hot dip galvanized pipe is to dip the steel pipe into the molten zinc liquid for galvanizing, which has a more uniform zinc layer and better corrosion resistance. The electrogalvanized pipe deposits zinc on the surface of the steel pipe by electrochemical method, and the zinc layer is thinner.

3, according to the different dimensions and uses, galvanized pipe can be divided into hot-dip galvanized square pipe, hot-dip galvanized round pipe, hot-dip galvanized rectangular pipe and other specifications and models.

Specifications and parameters of galvanized pipe

1, galvanized pipe specifications mainly include outer diameter, wall thickness, length, pipe material and so on. Different specifications of galvanized pipes are suitable for different fields and applications.

2. According to the national standard, the outer diameter and wall thickness of galvanized pipe are calculated as follows:

Outer diameter (mm) = nominal outer diameter (mm) -2× wall thickness (mm)

Wall thickness (mm) = (nominal outside diameter (mm) - Outside diameter (mm)) /2

3, the weight of galvanized pipe can be calculated by the following formula:

Weight (kg/m) =0.02466× (outer diameter (mm) - wall thickness (mm)) × wall thickness (mm)

The market application and prospect of galvanized pipe

1, the main application areas of galvanized pipe include water supply, drainage, oil, natural gas and other industries. Galvanized pipe has good corrosion resistance and high protection ability, which can ensure the safety and long-term operation of industrial pipelines.