公开(公告)号：US06559373B2

公开(公告)日：2003-05-06

申请号：US09974983

申请日：2001-10-12

申请人： Won Yong Choi ,  Kyoo Young Kim ,  Hyun Woong Park

发明人： Won Yong Choi ,  Kyoo Young Kim ,  Hyun Woong Park

IPC分类号： H01L31042

CPC分类号： H01G9/2031 ,  C23F13/16 ,  Y02E10/542 ,  Y02P70/521 ,  Y10S136/291

摘要： The present invention relates to a solar powered cathodic protection system using a photocatalyst which functions as a non-sacrificial photoanode under sunlight, wherein said non-sacrificial photoanode consisting of the photocatalyst such as TiO2 (or ZnO) and an electrolyte, is galvanically connected to a metal structure to be protected and continuously provides electrons to the metal structure, whereby the metal structure is protected from the corrosion. The solar powered cathodic protection system using a non-sacrificial photoanode according to present invention is advantageous in that 1) an external power supply is not necessary, 2) it is easy to maintain the system because the non-sacrificial photoanode according to the present invention can be installed outdoors, and 3) the photocatalyst used as the non-sacrificial photoanode is inexpensive and semipermanent.