타이타늄 금속의 전기 화학적 산화반응과 타이타늄 산화물 피막의 부식에 관한 연구 = A Study on Electrochemical Oxidation of Titanium Metal and Corrosion of Titanium Oxide Film

다국어 초록 (Multilingual Abstract)

This research is aimed at finding a method to improve hardness, corrosion resistance, and abrasion resistance of metal surfaces by investigating the relationship between oxide membrane formation and the corrosion of titanium.
For this study, oxide membranes of titanium, zirconium, and tantalum were formed by electrochemical oxidation reaction (namely, anodizing) and the membranes were corroded with several amounts of concentration of an electrolyte solution. The extent of corrosion was measured with a potential driving method and potentiometer. A 5% concentration of several electrolyte solutions in electrolytic baths were prepared and after connecting experimental titanium on the (+) pole and a zinc plate on the (-) pole, the formation of the oxide membrane was observed according to the type of electrolyte, voltage, and time.
The corrosion measurement was carried out with the potential driving method. A metal specimen of titanium measuring 1.5 cm in diameter was prepared after anodization. After dipping it in several electrolyte solutions, the specimen was connected to a circuit composed of a standard pole and a counter pole. The extent of corrosion was measured by scanning it to the potential of +16mV with the speed of 5mV per second. The extent of metal corrosion was confirmed with SEM (Model LEO 1530).
From the results of metal oxidation membrane formation, the color and thickness of the membrane was differentiated from the voltage applied and the types of metal. In the analysis of corrosion of anodized metal, the extent of corrosion was dependent on the amount of electricity, types of solution, and the frequency of corrosion experiments.