The surface anti-corrosion coating of cable tray mainly includes hot-dip galvanizing, galvanized nickel, cold galvanizing, powder electrostatic spraying, etc. Below, the manufacturer of the cable tray will introduce how to select the surface anti-corrosion coating for the cable tray.
The data shows that the service life of hot-dip galvanizing process is not less than 40 years, which is suitable for outdoor heavy corrosive environment with high cost; The service life of galvanized nickel process shall not be less than 30 years, and it is also suitable for outdoor heavy corrosive environment, with high cost; The service life of cold galvanizing process shall not be less than 12 years. It is suitable for outdoor light corrosive environment and the cost is general; The service life of powder electrostatic spraying process shall not be less than 12 years. It is suitable for indoor normal temperature and dry environment. The price is average.
The designer shall reasonably select the type of anti-corrosion coating on the surface of the cable tray according to the environmental conditions of the project, and clearly express it in the design documents.
In the sections with fire protection requirements for cable trays, plates, nets and other materials with fire-resistant or flame-retardant properties can be added to the cable ladders and trays to form a closed or semi closed structure, and measures such as painting a fire-resistant coating on the surface of the cable trays and their supports and hangers shall be taken. The overall fire resistance performance shall meet the requirements of relevant national codes or standards. Aluminum alloy cable trays should not be used in places with high fire protection requirements.
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