313 HWAHAK KONGHAK Vol. 41, No. 3, June, 2003, pp. 313-318 † , 540-742 315 (2002 2 18 , 2003 4 12 ) Physicochemical Characterization for Thermal Spray Coated Films from Steel Powder Slags Young-Seak Lee, Sung Gi Jung, Seung Hwa Yoo and Gyou Jin Cho † Department of Chemical Engineering and Nanotechnology Center, Sunchon National University, 315 Maegok-dong Sunchon, Chonnam 540-742 Korea Received 18 February 2002; accepted 12 April 2003) 90 wt% , . . 65-90 μm, 90-106 μm 106-125 μm , 106-125 μm , XRD XPS . Abstract - The steel powder slags, consisted of 90 wt% of carbon and iron oxides, can be simply reduced to carbon and iron. In this research, we studied the physicochemical characteristics of thermal spray coated films prepared using the reduced pow- der slags as a highly valuable powders for the thermal spray coatings. After the reduced powder slags were divided into three fractions(65 to 90 μm, 90 to 106 μm, and 106 to 125 μm) based on the particle sizes, we carried out the thermal spray coating using each samples under the same thermal spray coating condition and found out that the particles with the sizes of 106 to 125 μm had the best deposition efficiency. The microstructures of the coated films were investigated using XRD and XPS, and the adhesion strength and corrosion resistance were studied as well. Key words: Thermal Spray Coating, Reduced Powder Slags, Thermal Spray Coated Film 1. , 65% . (slag) , , , . 2 . , [1-3]. 50 wt% [4] 40 wt% , [5]. 16 kg 10% . . Fe(40 wt%) C (50 wt%) , . , , , , , , , , † To whom correspondence should be addressed. E-mail: gcho@sunchon.ac.kr