The main treatment method of hot-dip gi coil is to prevent the corrosion of the steel plate surface and prolong the service life of the steel plate. The product has the advantages of simple structure, light weight, good bearing capacity, impact resistance, better bending than bending, large drainage, beautiful and durable after hot-dip galvanizing, and anti-corrosion, etc., which cannot be compared with cast iron cover plates. It adopts hinge connection or hook connection, which is easy to open and has anti-theft function. Steel grating is an open steel member composed of load-bearing flat steel and cross bars at a certain distance, which is fixed by welding or pressing; cross bars are generally made of twisted square steel, round steel or flat steel, and the material is divided into carbon steel and stainless steel.

Galvanizing prevents corrosion, provides a zinc protective film for metals, provides repair and color enhancement maintenance agents for conductive metal materials, synthetic metal resin protective layer and cathodic protection layer, resists severe weather, and is suitable for long-term metal exterior protection; excellent resistance Salt and water are corrosive. It is closely connected with various metals and their alloys. Can be sprayed directly without primer. It is resistant to high temperature and is not afraid of baking. The dried coating can resist the high temperature of about 120 ℃. Anti-drying temperature up to 80°C, fast drying.

There are two types of electroplating protection for gi coil, cathodic coating and anodic coating. Zinc coating is an anodic coating. Due to its lower potential, it can protect steel from corrosion by sacrificing itself in spent seeds. Cathodic protection of sacrificial anodes. Cathodic coatings are designed to form a dense coating protective layer that prevents direct contact of water and oxygen with the protected metal. Its disadvantage is that once the protective layer is damaged, galvanic corrosion will form, but the protected local corrosion will be accelerated.

The surface treatment method of hot-dip gi coil mesh panels usually adopts the processing method of hot-dip galvanizing treatment process. The hot-dip galvanizing method can ensure the long-term use of carbon steel and prevent corrosion and oxidation of the steel grating. The corrosion resistance of hot-dip gi coil mesh is very good. In a dry environment, the hot-dip galvanized steel grating can be used for 30 years; in a harsh and humid environment, it can also be used for more than ten years. However, in environments with particularly strong pH values, the service life will be greatly shortened.

The aluminum content in the steel alloy layer of hot-dip galvanized steel grating is less, and there is no reasonable alloy layer that plays a decisive role in the adhesion of the zinc layer, or the alloy layer is damaged by the overgrown iron-zinc alloy layer. Therefore, in order to reduce the shedding of the zinc layer of the hot-dip galvanized steel grid, the surface cleaning work before galvanizing should be done well to ensure the atmosphere control in the annealing furnace, improve the quality and service life of the hot-dip gi coil grid, and ensure that the steel grid For complete reduction of the grid substrate, adjust the composition temperature of the zinc solution.