| 摘要 |
The present invention relates to an apparatus for simultaneously producing an anodized film on the inner part and outer part of an aluminum pipe and, more specifically, to the apparatus for simultaneously producing an anodized film on the inner part and outer part of an aluminum pipe which uses the anodized film method of preventing corrosion by forming a film on the inner surface of a pipe to prevent corrosion of the inner surface of a drainage pipe, since the aluminum surface of the inner surface of a drainage pipe used in a road bridge is corroded by acid rain, calcium chloride, corrosive substances in the atmosphere, acid, alkali, chlorine ion, etc. According to the present invention, using the anodized film method of preventing corrosion by forming a film on an inner surface of a pipe to prevent corrosion of inner surface of a drainage pipe, accordingly service life of a drainage pipe can be maximized by simultaneously forming an artificial film on an inner surface and an outer surface of a pipe and improving corrosion resistance and wear resistance, and moreover, the exchange interval of an aluminum drainage pipe currently constructed can be extended, thereby reducing relevant costs and contributing to the improvement of construction work stability. |
