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Aluminum roof truss
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In order to overcome the defects of aluminum alloy surface hardness and wear resistance, and extend the service life of aluminum roof truss, surface treatment technology has become an indispensable part of aluminum alloy use. Metal oxide films alter surface conditions and properties such as surface coloration, improved corrosion resistance, enhanced wear resistance and hardness, and protection of metal surfaces. For example, aluminum is anodized, and the aluminum alloy is placed in a corresponding electrolyte (such as sulfuric acid, chromic acid, oxalic acid, etc.) as an anode, and electrolysis is performed under specific conditions and an applied current. The aluminum of the anode or its alloy is oxidized, and a thin layer of aluminum oxide is formed on the surface thereof, and the thickness thereof is 5 to 20 μm. The anodized aluminum or its alloy improves the hardness and wear resistance. Handling the surface of concert stage truss is a great way to improve the acid and alkali resistance of stage trusses.

https://www.tytruss.com/Square-Truss/Squ...russ.shtml
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