The third common problem in engineering design is that the type of aluminum alloy cable tray is not marked with the type of anti-corrosion coating, and there is no unified written description.
This problem is a lesson in reality. No salt spray test was performed on the corrosion treatment of the steel cable bridge deck. The bridge frame suffered very serious corrosion soon after it was built and had to be replaced. The surface anti-corrosion coating of aluminum alloy cable tray mainly includes hot-dip galvanizing, galvanizing nickel, cold galvanizing, powder electrostatic spraying, etc. The manufacturer’s data shows:
The process life of hot-dip galvanizing is not less than 40 years, which is suitable for outdoor severe corrosive environment and the cost is high; the service life of zinc-nickel plating is not less than 30 years, and it is also suitable for high-cost outdoor heavy corrosive environment.
The life of cold galvanizing process is not less than 12 years, suitable for outdoor light corrosive environment, and the cost is average;
The service life of the powder electrostatic spraying process is not less than 12 years. It is suitable for indoor room temperature and dry environment, and the price is average.
The designer should reasonably choose the type of anti-corrosion coating on the surface of the AAAC conductor rack according to the engineering environmental conditions, and clearly express it in the design documents.
What material is usually made of aluminum alloy cable tray?
In our lives, although there are not many contacts, we can experience it as a bridge at this time. Generally speaking, our wires are a very important component. There is no seal, and they are generally able to withstand harsh environments. .
Therefore, when we choose a bridge, we will need to meet such requirements. This time we actually value the quality of the bridge itself very much. However, in the future, we will spend a lot of time in the quality of our bridges. If the quality is not good, In the future, it will be troublesome for us to replace it again, so we will give a good quality level from the beginning.
Usually our materials must not be able to meet this requirement. Only certain special steel products can meet such requirements. Such materials not only require strong compression resistance, but also our good anti-corrosion performance. Usually we have a guarantee of quality in order to be able to withstand Sunlight, so we can meet such a request is very rare.