The surface anti-corrosion treatment of highway guardrail nets is usually divided into two types: single-coat anti-corrosion system and double-coat anti-corrosion system. As the name implies, the so-called single layer and double-layer refer to the number and type of anti-corrosion treatments for highway guardrail nets. Single-coat The anti-corrosion system includes hot-dip galvanizing, spraying, and dipping, while the double-coat anti-corrosion system includes galvanizing followed by spraying or dipping. The principle of hot-dip galvanizing anti-corrosion treatment is: simply put, it is the principle of electrolysis, which allows metal zinc and iron guardrail nets to form a group of primary batteries. The metal zinc serves as the anode and is gradually consumed after power is applied. The surface of the iron guardrail net gets metallic zinc. Gradually being protected, galvanizing is the electrolytic metal zinc forming a layer of metal zinc on the surface of the product that needs to be protected. Since the metal zinc is exposed to the outside, it is not easily oxidized, thus achieving the effect of protecting the guardrail net product.

The principle of spraying to achieve anti-corrosion effect is based on the principle of electrostatic adsorption to spray the surface of highway guardrail net. The spraying material uses polyester plastic coating. Polyester plastic has good stability and is not easy to be decomposed in the outside world. Spraying can well absorb the air Isolated from the iron wire, according to the current spray painting process technology, the spray thickness cannot be changed. In the anti-corrosion treatment, plastic dipping is acceptable to the public. Although the price is a little higher than the first two, the anti-corrosion effect is obvious. The plastic dipping uses a fluidized bed process and the material is polyethylene coating. The principle is to pre-prepare the product. After heating, the thermal effect of the product is used to melt the polyethylene powder and adhere to the surface of the product. Compared with spray molding, the thickness of dip molding can be adjusted according to user requirements. So it is natural that in a double-coating system, it is first galvanized and then sprayed or dipped. The product is double-layered and has good anti-corrosion properties.