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제철 분진 슬래그를 이용한 열용사 코팅 막의 물리화학적 특성분석
Physicochemical Characterization for Thermal Spray Coated Films from Steel Powder Slags
순천대학교 화학공학과 나노기술센터, 540-742 전남 순천시 매곡동 315
Department of Chemical Engineering and Nanotechnology Center, Sunchon National University, 315 Maegok-dong Sunchon, Chonnam 540-742, Korea
gcho@sunchon.ac.kr
HWAHAK KONGHAK, June 2003, 41(3), 313-318(6), NONE
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Abstract
제철소 제강공정 부산물인 분진은 탄소와 산화철이 전체의 90 wt%를 차지하는 미세분말로서, 이를 환원하면 카본과 철이 주성분이 된다. 본 연구에서는 이들 환원 분진을 고부가가치 재료인 열용사 코팅 분말로 사용하여 열용사 코팅 후 코팅 막의 물리 화학적 특성을 조사하였다. 환원 분진은 입도별로 65-90 μm, 90-106 μm와 106-125 μm 입자들로 분리하여 열용사를 동일한 조건하에서 수행하였으며, 이 때 106-125 μm의 입도를 지닌 환원 분진을 이용한 열용사 증착 효율이 가장 우수하였으며, 코팅 막의 미세구조를 XRD와 XPS를 이용하여 조사하였고 코팅 막의 접착강도 및 내 부식성을 조사하였다.
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 powder 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.
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Rosano HL, Breindel K, Schulman JH, Eydt AJ, J. Colloid Interface Sci., 22, 58 (1966)
Ban BC, "Preparation of Sponge Iron Powder for Abrasives by Gas Reduction," Research Report, SANHAK HYUPDONG JAEDAN (1991)
Thrope ML, Adv. Mater. Process., 143, 50 (1993)
Powlowski L, "The Science and Engineering of Thermal Spray Coatings," John Wiley & Sons, Singapore (1995)
Rayment T, Grant P, "Optimisation of an Electric Arc Gun Cluster Design for the Sprayform Tooling Process," Proceedings of the 1st ASM International Surface Engineering Congress and the 13th International Federation for Heat Treatment and Surface Engineering Congress (2003)
Zhang T, Tang BY, Chen QC, Zeng ZM, Chu PK, Bilek MMM, Brown IG, Rev. Sci. Inst., 70, 3329 (1999)
Jackson MR, Rairden JR, Smith JS, Smith RW, J. Metals, 33, 23 (1981)
Uozato S, Nakata K, Ushio M, Surf. Coat. Technol., 169 (2003)
Dissolved Fe Contents from Reduced Powder Slags Using Sulfuric Acid and Measured Dissolved Fe Amounts in the Solution Using Atomic Absorption Spectrocopy
Crawmer DE, Bartoe RL, Kramer J, Surf. Coat. Technol., 33, 353 (1987)
Moreau C, Cielo P, Lamontagne M, J. Thermal Spray Tech., 1, 317 (1992)
Moulder JF, Stickle WF, Sobol PE, Bomben KD, "Handbook of X-ray Photoelectron Spectroscopy," Chastain, J. and King, R.C., Eds., Physical Electronics, Inc., Eden Prairie, MN (1995)
Chuanxian D, Bingtan H, Huiling L, Thin Solid Films, 118, 485 (1984)
Uozato S, Nakata K, Ushio M, Surf. Coat. Technol., 169 (2003)
