Study oh Evaluation of Corrosion Behavior of Transparent Electrically Conductive Film

1992 Fiscal Year Final Research Report Summary

• Project/Area Number: 03650570
• Research Category: Grant-in-Aid for General Scientific Research (C)
• Allocation Type: Single-year Grants
• Research Field: 金属材料(含表面処理・腐食防食)
• Research Institution: The University of Tokyo
• Principal Investigator: SHINOHARA Tadashi The University of Tokyo, Faculty of Engineering, Associate Professor, 工学部, 助教授 (70187376)
• Co-Investigator(Kenkyū-buntansha): TSUJIKWA Shigeo The University of Tokyo, Faculty of Engineering, Professor, 工学部, 教授 (20011166)
• Project Period (FY): 1991 – 1992
• Keywords: semiconductor electrode / n-type semiconductor / transparent electrically conductive film / ITO / cathodic protection / non-sacrificialy cathodic protection

Research Abstract

Electrochemical and photo-electrochemical behaviors of ITO (Indium Tin Oxide), which was transparent electrically donductive film and n-type oxide semiconductor, and ITO-Ag couple were investigated in 0.3-20% NaCl solutions at room temperature. Anodic phenomena on ITO were affected only by illumination, and photo current became lager with increasing intensity of illumination light. Cathodic one was affected by not only illumination but also dissolved oxygen. For ITO-Ag couple, ITO was cathobe and Ag anode. So it was difficult to protect Ag with ITO.It was found that TiO2 film, which was also n-type oxide semiconductor, coated on ITO could protect Ag cathodically.