Galvanized angle steel is divided into hot-dip galvanized angle steel and cold-dip galvanized angle steel. Hot-dip galvanized angle steel is also called hot-dip galvanized angle steel or hot-dip galvanized angle steel. The cold galvanized paint mainly guarantees the full contact between the zinc powder and the steel through the electrochemical principle, and generates the electrode potential difference to prevent corrosion.

According to process classification, it can be divided into hot-dip galvanized angle steel and cold-dip galvanized angle steel. Hot-dip galvanized angle steel is common in the market. Cold galvanized angle steel generally needs to be processed by cold plating according to user needs. According to the side length, it can be divided into galvanized equilateral angle steel and galvanized unequal angle steel.
Hot-dip galvanizing is divided into blow plating and rack plating.

Process flow

Hot dip galvanized angle steel
Hot-dip galvanized angle steel is also called hot-dip galvanized angle steel or hot-dip galvanized angle steel. It is to immerse the derusted angle steel in a molten zinc solution at about 500°C to attach a zinc layer to the surface of the angle steel to achieve the purpose of anti-corrosion. It is suitable for various strong acids, alkali mists and other strong corrosive environments.
Process: hot-dip galvanized angle steel process: angle steel pickling → water washing → immersion flux solvent → drying and preheating → rack plating → cooling → passivation → cleaning → polishing → hot-dip galvanizing completion.
The thickness of the galvanized layer of the hot-dip galvanized angle steel is uniform, up to 30-50um, and has good reliability. The galvanized layer and the steel are metallurgically bonded and become a part of the steel surface, so the durability of the coating of the hot-dip galvanized angle steel is relatively reliable . The raw material of hot-dip galvanized angle steel is angle steel, so the classification is the same as angle steel.

Galvanized angle steel
The cold galvanizing process is used to protect metals from corrosion. For this purpose, zinc filler coatings are used, which are coated on the protected surface by any coating method. After drying, a zinc filler coating is formed. In the dry coating With content of zinc (up to 95%). It is suitable for repair work (that is, in the process of repair work, only in the place where the steel surface is damaged, as long as the surface is repaired, it can be recoated). The cold galvanizing process is used for anticorrosion of various steel products and structures.
Cold galvanized coatings are mainly used for anti-corrosion through electrochemical principles. Therefore, it is necessary to ensure that the zinc powder and the steel are in full contact to produce electrode potential differences, so the surface treatment of the steel is very important. Before spraying cold galvanizing, mechanical rust removal (sandblasting, shot blasting, etc.) should be selected to make the surface cleanliness of the steel reach ISO 85O1-1 Sa 2.5, which is equivalent to GB 8923 Sa 2.5. Its text is defined as: "After the steel is mechanically derusted, there is no oil, no rust, no oxide scale and other dirt on the surface, or only slight traces; 95% of the steel surface is impacted by steel shot (sand) and exposed The luster of the metal."
For another indicator of surface treatment quality-roughness, different cold galvanized materials have different requirements for roughness. In the construction instructions of Zinga, the average roughness Ra=12.5 is required, that is, the roughness Rz=55～75 microns. In the "Strong Zinc" and "Robaru" construction instructions, the roughness requirements are slightly lower, Rz=40-60 microns.
If the cold galvanized film is formed separately, when used as an anti-corrosion coating, the surface roughness can be controlled slightly to ensure the thickness of the cold galvanized coating; and when cold galvanized is used as the bottom layer of the heavy anti-corrosion coating, the total matching coating When the thickness is greater than 180 microns, in order to ensure the adhesion of the entire coating, the surface roughness Rz of the steel should be greater than 60 microns.

advantage

1. Low processing cost: the cost of hot-dip galvanizing and rust prevention is lower than that of other paint coatings;
2. Durable and durable: hot-dip galvanized angle steel has the characteristics of surface gloss, uniform zinc layer, no leakage, no dripping, strong adhesion, and strong corrosion resistance. In the suburban environment, the standard hot-dip galvanized anti-rust thickness can be maintained No need to repair for more than 50 years; in urban areas or offshore areas, the standard hot-dip galvanized anti-corrosion layer can be maintained for 20 years without repair;
3. Good reliability: The galvanized layer and the steel are metallurgically bonded and become a part of the steel surface, so the durability of the coating is more reliable;
4. The coating has strong toughness: the zinc coating forms a special metallurgical structure that can withstand mechanical damage during transportation and use;
5. Comprehensive protection: every part of the plated parts can be plated with zinc, even in recesses, sharp corners and hidden places can be fully protected;
6. Time-saving and labor-saving: the galvanizing process is faster than other coating construction methods, and it can avoid the time required for painting on the construction site after installation.

Appearance Quality

The surface quality of angle steel is stipulated in the standard, and it is generally required that there should be no harmful defects in use, such as delamination, scarring, and cracks.
The allowable range of angle steel geometric shape deviation is also stipulated in the standard, which generally includes items such as curvature, side width, side thickness, top angle, theoretical weight, etc., and stipulates that the angle steel must not be significantly twisted.

use

Galvanized angle steel is widely used in power towers, communication towers, curtain wall materials, shelf construction, railways, highway protection, street lamp poles, marine components, building steel structural components, substation auxiliary facilities, light industry, etc.

Specification weight

Factory appearance  

Packing & Delivery

Our Company

Shandong Chengming Steel Co.,Ltd

Our company supplies cold/hot-rolled stainless steel sheets,stainless steel bars ,stainless steel coil stainless steel pipes,lead plate,bearing steel,spring steel,steel plate pile,tank plate,alloy steel plate,weather resistant steel plate and wear resistant plate to many steel factories from at home and abroad, including Shanxi Taigang Iron& Steel CO,.LTD (TISCO) Zhangjiagang Pohang (ZPSS), Shanghai Krupp, Ningbo Baoxin and steel factories in Taiwan area, Mainland Chinese and foreign countries and regions.

Our annual capacity is 25, 000 tons. The Annual Domestic Sale is 20 million, Annual Exported Sale about 12 million dollars.Our products supplied to more than 20 countries, such as Indonesia, Spain, Japan, Korea, Vietnam, Italy, Israel,Australia, Malaysia, Brazil, Pakistan, U. A. E, Peru, India etc. Good quality has been getting more and more prise from buyers at home and abroad.Our long-term business lines are 304 .202, 201 .430.409L, 304L, 316L, 309S and 310S, Finish: 2B ,BA ,NO.1 NO.4 ,HL, NO.8 and so on . For the sheets and coils,the thickness ranging from 0.3mm to 100mm.For the bars,the diameter ranging from 1mm to 300mm.For the pipes ,we have seamless pipe and weld pipe. Meanwhile, our company is also engaged in the long-term supply of homemade & imported medium and thick plates,galvanized or carbon