Pre galvanized square tube is a kind of square and rectangular pipe material that has been specially processed

1. Definition

Pre galvanized square tube is a kind of square and rectangular pipe material that has been specially processed. It is usually made by unpacking, flattening, curling, welding and other processes of strip steel into round tubes, then rolling the round tubes into square tubes, and finally pre-galvanizing the surface. This pre-galvanizing treatment method makes the zinc layer tightly adhere to the surface of the square tube, forming a protective film.

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2. Advantages

(I) Good anti-corrosion performance

1) Sacrificial protection of zinc layer

- When pre-galvanized square tubes are in an environment with corrosion risk, such as a humid place with chemical corrosive substances, the zinc layer will act as a sacrificial anode. Because zinc is more active than iron, zinc will react with the corrosive medium first during the corrosion process, thereby protecting the square tube matrix from corrosion. For example, in outdoor building structures, even if they are eroded by rain and air for a long time, as long as the zinc layer is intact, the square tube can maintain good structural integrity.

2) Dense zinc layer structure

- The zinc layer formed by pre-galvanizing is a dense quaternary crystal structure. This structure forms an effective barrier on the steel plate to prevent external corrosion factors from penetrating into the interior of the square tube. Compared with ungalvanized square tubes, pre-galvanized square tubes can greatly extend their service life and reduce maintenance costs.

### (II) Aesthetics

1. Uniform appearance

- The surface of the pre-galvanized square tube presents a uniform zinc color and has good gloss. This uniform and beautiful appearance is very popular in the field of architectural decoration. For example, it can enhance the overall aesthetics of the building facade decoration and indoor partitions.

2. Adapt to a variety of environments

- Under different environmental conditions, the surface color of the pre-galvanized square tube is relatively stable. Whether it is in strong light, low temperature or hot environment, it will not change color easily, and always maintain a good visual effect.

### (III) Good mechanical properties

1. High strength

- Pre-galvanizing does not have a significant impact on the strength of the square tube, and it can still maintain a high tensile strength and yield strength. In building structures, such as beams and columns of steel structure workshops, structural components can withstand large loads.

2. Good machinability

- Square tubes can be welded, cut, bent and other processing operations. Although the pre-galvanized layer will be affected to a certain extent during the processing, it can still maintain a certain degree of anti-corrosion performance after proper treatment. This machinability is very important when making complex metal products.

3. Application

### (I) Construction field

1. Structural support

- In the steel structure frame of large buildings, pre-galvanized square tubes can be used as the main supporting components. For example, in high-rise buildings, they are used to build stairs, balconies, roof frames, etc.

2. Wall decoration

- As a decorative material, pre-galvanized square tubes can be used for the shaping of the interior and exterior walls of buildings. Its beautiful appearance can be matched with different building materials such as glass and stone to create a modern and simple architectural style.

### (II) Transportation field

1. Vehicle manufacturing

- In the manufacture of automobiles, ships, railway vehicles, etc., pre-galvanized square tubes can be used for the production of body frames. Automobile bodies need to withstand various stresses and corrosive environments.

2. Transportation facilities

- In road and bridge construction, pre-galvanized square tubes can be used to make railings and guardrails. These transportation facilities need to be exposed to the external environment for a long time. Pre-galvanized square tubes can resist erosion such as wind, rain, and ultraviolet rays to ensure traffic safety.

### (III) Agricultural field

- Pre-galvanized square tubes can be used to build greenhouse frames. In agricultural greenhouses, the environmental humidity is high, and there may be acidic and alkaline gases. The anti-corrosion performance of pre-galvanized square tubes can ensure the structural stability of the greenhouse, extend the service life of the greenhouse, and provide a stable environment for the growth of crops.

### (IV) Home life field

1. Furniture manufacturing

- In furniture manufacturing, such as wardrobes, bookshelves, tables and chairs, pre-galvanized square tubes can be used as frame materials. Its beauty and durability can improve the quality of furniture, and its anti-corrosion performance can also adapt to various conditions in the home environment and extend the service life of furniture.

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4. Specification

OD:10*10-500*500mm/20*30-300*500mm

WT:0.6-16mm
L:0.5-15M