As an important carrier of the power transmission system, the trough box cable tray is exposed to complex environments for a long time. Its surface spraying process plays an important role in its service life. The spraying process is not only related to the appearance of the bridge, but also affects its internal performance and service life in many ways.
The spraying process first directly affects the corrosion resistance of the trough box cable tray. High-quality spraying technology can form a dense and continuous protective film on the surface of the bridge, effectively isolating moisture, acid and alkali substances and corrosive gases in the air. This protective film is like armor, preventing external corrosive media from directly contacting the metal matrix, thereby slowing down the oxidation and corrosion process of the metal. Once the spraying process is not good, the coating has defects such as pores and peeling, and the metal material of the bridge will quickly rust, accelerate structural damage, and greatly shorten the service life.
The quality of the spraying process also affects the wear resistance of the trough box cable tray. In daily use, the bridge may cause friction due to cable installation, maintenance and other operations, or surface wear due to collision with foreign objects. A good spraying process will make the coating have higher hardness and toughness. When it is subjected to friction or collision, the coating can effectively buffer external forces and prevent damage to the metal substrate. On the contrary, if the spraying process is rough, the coating is easily scratched and peeled off, resulting in direct exposure of the metal, aggravated wear, premature loss of protection of the bridge, and shortened service life.
Different types of spraying processes such as thermal spraying and electrostatic spraying have a significant impact on the adaptability of trough box cable tray in extreme temperature environments. A suitable spraying process can make the coating and the metal bridge tightly combined. When the temperature changes, the two will expand and contract synchronously, reducing the stress caused by thermal expansion and contraction. This ensures that the coating does not soften or bulge at high temperatures, and does not crack or fall off at low temperatures, and always maintains its protective effect on the bridge. Improper process selection may cause the coating to separate from the bridge during temperature fluctuations, reduce the protective effect, and affect the service life of the bridge in different environments.
The surface treatment process before spraying is the key prerequisite for determining the quality of the coating. Only by thoroughly removing impurities such as oil, rust, and dust from the surface of the bridge and performing appropriate roughening treatment can the adhesion between the coating and the metal surface be enhanced. If the surface treatment is not up to standard, the bonding strength between the coating and the bridge is insufficient. Even if the subsequent spraying process is exquisite, the coating is prone to peeling and falling off, and cannot continue to provide protection for the bridge, thus affecting the service life of the bridge.
The construction quality of the spraying process is directly related to the uniformity and integrity of the coating. Uniform coating thickness can ensure that all parts of the bridge are uniformly protected, avoiding weak protection due to local coating being too thin. The complete coating can prevent the external medium from invading the interior of the bridge through coating defects. If there are problems such as uneven spraying and missed spraying during the construction process, the local area of the bridge will be the first to suffer from corrosion and damage, becoming a hidden danger point that affects the overall service life.
In addition, the spraying process is also closely related to the anti-oxidation performance of the trough box cable tray. The oxygen in the air will continuously react with the metal to oxidize, and the coating formed by the high-quality spraying process can effectively block the contact between oxygen and metal and delay the oxidation process. This not only maintains the appearance and color of the bridge, but more importantly, prevents the metal from losing strength due to oxidation, ensures that the bridge maintains structural stability during long-term use, and prolongs its service life.
From corrosion resistance, wear resistance, temperature adaptability, to surface treatment, construction quality and anti-oxidation, the surface spraying process of trough box cable tray has an all-round impact on its service life. Only by adopting a scientific and reasonable spraying process and strictly controlling the construction quality can we create a long-lasting and reliable protective barrier for the trough box cable tray and ensure its safe, stable and long-term operation in various environments.
