Because the aluminum alloy truss is welded with high-strength aluminum alloy material 6061-T6 or 6082-T6. Because aluminum itself is a relatively active metal component, it is easy to react chemically with external acids and alkalis. If it is in water for a long time, the aluminum component will also react chemically in the water. In order to provide the stability of the performance of the aluminum alloy truss, the technicians have improved its acid and alkali resistance. We oxidize the aluminum alloy truss so that a layer of oxide film is attached to its surface, which prevents the corrosion of the aluminum alloy truss by external substances.
In order to overcome the defects of aluminum alloy surface hardness, wear resistance and other aspects and extend the service life, surface treatment technology has become an indispensable part of the use of aluminum alloy. The metal oxide film changes the surface state and performance, such as surface coloring, improving corrosion resistance, enhancing wear resistance and hardness, protecting the metal surface, etc. For example, aluminum anodizing, the aluminum alloy is placed in the corresponding electrolyte (such as sulfuric acid, chromic acid, oxalic acid, etc.) as an anode, and electrolysis is carried out under specific conditions and external current. The aluminum or its alloy of the anode is oxidized to form a thin layer of aluminum oxide on the surface with a thickness of 5 to 20 microns. The anodized aluminum or its alloy has improved hardness and wear resistance.
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