As a device for carrying and protecting cables, Shandong cable tray makes wiring safe and beautiful in buildings, easy to maintain, and widely used in civil and industrial buildings. The cable tray becomes the main part of the cable tray with its good mechanical strength and bearing capacity. However, in some harsh acid, alkali and humid environments, corrosion resistance has become an important factor to be considered when using or not using cable trays. Due to the different environments in which cable trays are used, the anti-corrosion methods used on their surfaces are also different. What are the common anti-corrosion methods for cable trays in Shandong?
Shandong cable tray
1. Electro galvanized.
Compared with hot galvanizing, electro galvanizing is simple in process and low in cost. There are no special requirements for the structure of Shandong cable tray. After passivation treatment, the protective performance of the zinc coating has been significantly improved. The galvanized layer is slightly thin, which is not suitable for occasions with high corrosion resistance life requirements.
2. Hot dip galvanizing.
Zinc has good corrosion resistance under atmospheric conditions. Galvanizing is a method to protect cathode metal by sacrificing anode. Its corrosion resistance life depends on the thickness of zinc coating and corrosion rate. The thickness of zinc layer of hot galvanizing is generally above 65um. A layer of zinc iron alloy is formed on the joint surface of zinc and iron, which enhances the adhesion of zinc layer. Hot dip galvanized bridge frame is widely used at home and abroad because of its good corrosion resistance and high cost performance.
3. Non metal cable tray, referred to as glass fiber reinforced plastic cable tray.
This new cable tray uses flame retardant synthetic resin as adhesive and glass fiber as reinforcement. It has high corrosion resistance, electrical insulation, light weight, high strength, good flame retardancy, bright color and reliable use.
4. Electrostatic spraying.
The spraying materials are generally PVC powder, polyester powder or anti-corrosion powder. Electrostatic spraying has the characteristics of beautiful appearance and good chemical corrosion resistance. However, compared with metal coating, its adhesion strength is low, and its corrosion resistance and particle wear resistance are poor. In the process of use, it is easy to cause the local coating to fall off, so as to rust the substrate, causing the coating to bubble in a large area. In addition, the coating has poor UV resistance and is generally not suitable for outdoor use.
5. Apply anti rust paint.
Although the method of coating anti rust paint on Shandong cable tray is low in cost and convenient to use; But the corrosion resistance is poor. Short service life, heavy maintenance workload, rarely used.
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