Keynote speakers in anodizing, electrodeposition and electroplating symposium

Sungmo MOON,

Korea Institute of Materials Science & Korea University of Science and Technology, Korea

Email: sungmo@kims.re.kr

Presentation Title: Discussion on the growth of anodic oxide films on light metals under high electric field 

Resume

Sungmo Moon is a principal researcher at Korea Institute of Materials Science (KIMS) and a professor in the department of Advanced Materials Engineering at University of Science and Technology (UST). He is a former president of Korean Society of Surface Science and Engineering(KSSSE) and vice president of International Union for Surface Finishing (IUSF). He got his Ph.D in the field of materials science and engineering at Korea Advanced Institute of Science and Technology (KAIST) in 1997. He had stayed at the Corrosion and Protection Centre in University of Manchester Institute of Science and Technology (UMIST, 1998~1999) for anodizing research, Hokkaido Univ. (1999~2001) for pattering of aluminum alloy using laser irradiation technique after anodizing and National Research Council of Canada (NRC, 2001~2003) for studying of direct methanol oxidation for DMFC. He has been working for KIMS from 2003. His research area mainly includes surface treatments of light metals such as anodizing, plasma electrolytic oxidation and chemical conversion coatings of Al, Mg and Ti, corrosion failure analyses, surface modification for biomaterials, chemical and electrochemical polishing and polymer electrolyte fuel cells, based on electrochemical processes.

Abstract:

This presentation discusses growth mechanisms of anodic oxide films on light metals, such as Al, Mg and Ti under high electric fields, focusing on the electrochemical and physical processes that govern the formation and dissolution of the anodic oxide films. The growth mechanisms are strongly influenced by type of anodic oxide, the nature of anions in the electrolyte, temperature and the solution pH. Under a high electric field, the migration of cations and anions through the anodic oxide film drives film growth and generates heat. If the ionic resistance of the oxide film is sufficiently low, thick films can be formed even at relatively low applied voltages. The ionic resistance is determined by the composition, structure, and defect concentration within the oxide layer. Additionally, solution pH plays a critical role in shaping the growth dynamics. Chemical reactions at both the metal-oxide and oxide-electrolyte interfaces are also significant in determining the growth behavior. This presentation will provide a detailed analysis of the growth mechanisms of anodic oxide films under high electric fields, emphasizing ionic migration and the chemical and electrochemical reactions occurring in various electrolyte compositions used for anodic oxidation.