Surface treatment and characteristics of angle steel

1. Surface treatment and anti-corrosion methods of angle steel

Surface treatment and anti-corrosion of angle steel are key links to ensure its performance and extend its service life. Common surface treatment processes for angle steel include hot-dip galvanizing, cold-dip galvanizing, spray treatment, electrogalvanizing and mechanical galvanizing.

(1)Hot-dip galvanizing

This is to immerse the angle steel after rust removal in a zinc solution melted at about 500℃, so that a zinc layer is attached to the surface of the angle steel, thereby achieving the purpose of anti-corrosion. Hot-dip galvanized angle steel is also called hot-dip galvanized angle steel. Its galvanized layer has a uniform thickness, which can reach 30-50um and has good reliability. The galvanized layer is metallurgically bonded to the steel and becomes part of the steel surface. Therefore, the coating durability of hot-dip galvanized angle steel is relatively reliable. This process is suitable for various strong corrosive environments such as strong acid and alkaline mist.

(2)Cold galvanizing

Cold galvanizing paint mainly uses electrochemical principles to ensure full contact between zinc powder and steel, and generates an electrode potential difference for anti-corrosion. Cold-dip galvanized angle steel generally needs to be processed by cold plating according to user needs. ‌

(3)Spraying treatment

Spraying technology is used to evenly spray the paint on the surface of the angle steel to form a protective film to achieve the purpose of corrosion protection and beauty. ‌Spraying treatment is suitable for angle steel in various environments and uses. Commonly used spray coatings include paint, powder coating, galvanized coating, etc. ‌

(4)Electrogalvanizing

A layer of zinc is deposited on the surface of the angle steel by electrolysis, which has the advantages of uniform coating, strong adhesion and good corrosion resistance. ‌Electrogalvanizing is suitable for angle steel for decoration and protection. ‌

(5)Mechanical galvanizing

This is a new type of surface treatment technology, which uses high-speed rotating centrifugal force and mechanical force to evenly apply zinc powder and paint on the surface of the angle steel. ‌Mechanical galvanizing has the advantages of uniform coating, strong adhesion and good corrosion resistance, and is suitable for angle steel in various environments and uses. ‌

In summary, there are various surface treatment and anti-corrosion methods for angle steel. The method to be selected depends on the use environment, stress state, anti-corrosion requirements, processing technology and cost of angle steel. ‌

2. Advantages of angle steel

The characteristics of angle steel mainly include high strength, good plasticity, good anti-corrosion performance, moderate price, light weight and high strength, flexible construction, good welding performance and wide range of uses. ‌

(1)High strength

The cross section of angle steel is L-shaped, with high bending strength and bearing capacity, which enables it to withstand greater pressure and bending stress in engineering. ‌

(2)Good plasticity

Angle steel is easy to process and can be processed by cutting, bending, drilling and other methods to meet different engineering needs. ‌

(3)Good anti-corrosion performance

The surface of angle steel is usually treated with hot-dip galvanizing, which can improve its anti-rust performance and extend its service life. ‌

(4)Moderate price

The price of angle steel is relatively low, suitable for large-scale purchase and use, and has good cost performance. ‌

(5)Lightweight and high strength

Under the same load-bearing strength, angle steel is lighter, uses less material, and saves costs. ‌

Flexible construction: Angle steel takes up less space, is flexible to construct, and is easy to install and fix in a small space. ‌

(6)Good welding performance

The surface of angle steel is smooth, free of rust and oil, and is easy to weld, ensuring its stability and safety during use. ‌

(7)Wide range of uses

Angle steel is widely used in housing construction, bridges, tunnels, power towers, ships, brackets, steel structures and other fields, playing the role of supporting or fixing structures. ‌

In addition, according to different needs, angle steel can also be produced according to customer requirements, such as changing the cross-sectional size, wall thickness, surface treatment, etc., to meet the needs of specific projects2. ‌When purchasing angle steel, you should pay attention to choosing regular brands and manufacturers to ensure product quality and safety performance

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