The chain of the theatre hand chain hoist plays a crucial role in stage lifting operations. Its performance directly affects the safe operation and service life of the equipment, and the characteristics of rust and corrosion resistance as well as smoothness and wear resistance are core advantages achieved through elaborate design and technological processing.
In terms of rust and corrosion resistance, the complexity of the stage environment puts strict requirements on the chain. The invasion of rain and snow during open-air performances will keep the chain in a humid state for a long time. In indoor performances, condensed water from air conditioners and residual stage smoke agents may also form potential corrosion sources. In addition, floating dust in the air and trace corrosive gases generated by the heat dissipation of lighting equipment may all accelerate the rusting of the chain. For this reason, the surface of the chain will adopt multiple targeted treatment processes: Galvanizing treatment can form a uniform and dense zinc layer on the surface of the chain. With the help of the sacrificial anode effect of zinc, it provides long-term electrochemical protection for the chain. Even if the zinc layer is partially damaged, it can slow down the corrosion rate of the base iron, which is especially suitable for open-air performance scenarios in rainy areas; Blackening treatment generates a black oxide film on the surface of the chain through chemical oxidation. Although its rust resistance is slightly inferior to that of galvanizing, it can form good adsorption with lubricating oil and effectively resist dust erosion in dry indoor stage environments; Chromium plating treatment, relying on its extremely high chemical stability and hardness, builds a solid "protective shield" for the theatre hand chain hoist chain, which can withstand the long-term erosion of slight corrosive gases and is often used in large stages with dense equipment and complex environments; Spraying treatment covers the surface of the chain with a layer of polymer powder coating to achieve full-wrap protection. It not only has excellent rust and corrosion resistance, but also can be customized in color according to the needs of stage settings, combining functionality and aesthetics. These treatment processes can extend the service life of the theatre hand chain hoist chain by 3-5 times, greatly reducing the potential safety hazards caused by chain rust and breakage.
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