Because the scaffold is welded with high-strength aluminum alloy material, because aluminum itself is a relatively active metal component, it is easy to chemically react with the external acid and alkali. If it is in water for a long time, the aluminum component will also be chemical in water. In response, in order to provide the stability of the scaffolding performance, Yona stage technicians improved the acid and alkali resistance of the scaffolding, and oxidized the scaffolding to make it have an oxide film on the surface to prevent the corrosive effect of external substances on the scaffolding. . In order to overcome the defects of surface hardness and wear resistance of aluminum alloy and prolong the service life, surface treatment technology has become an indispensable part in the use of aluminum alloy. The metal oxide film changes the surface state and performance, such as surface coloring, improves corrosion resistance, enhances wear resistance and hardness, and protects the metal surface. For example, aluminum anodizing, the aluminum alloy is placed in the corresponding electrolyte (such as sulfuric acid, chromic acid, oxalic acid, etc.) as the anode, under specific conditions and the application of current, electrolysis. The aluminum or its alloy of the anode is oxidized, and a thin layer of alumina is formed on the surface with a thickness of 5-20 microns. The anodized aluminum or its alloy improves its hardness and wear resistance.