Passivity Improvement by Made-to-order Scanning Photo-electrochemical Surface Treatment with Ultra Violet-light Beam Irradiation

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K14136
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Composite materials/Surface and interface engineering
• Research Institution: Hokkaido University
• Principal Investigator: Fushimi Koji 北海道大学, 工学研究院, 准教授 (20271645)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 不働態強化 / 金属表面処理 / 耐食性向上 / 光電気化学反応

Outline of Final Research Achievements

Scanning photo-electrochemical apparatus was developed for a new surface treatment. In sulfuric acid, UV-light beam was irradiated on polycrystalline titanium and photo-electrochemical electric charge; photo-electrochemical current integrated by irradiation time was controlled. In-situ ellipso-microscopy and micro Raman spectroscopy revealed that local UV-light irradiation induced dehydration of hydroxide film and then crystallization of amorphous oxide to anatase. Photo-electrochemical polarization with feedback controlling of UV-light irradiation successfully served more homogeneous surface than simple polarization.

Free Research Field

腐食科学