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In this study, the material used in the hot dip galvanizing equipment was poorly corrosion-resistant, so it was performed to solve the cost and time problems caused by equipment replacement. The theoretical calculation was performed using the DV-Xα method(Discrete Variational Local-density approximation method). The alloy (STS4XX series) of the equipment currently used has a martensite phase. Therefore, the theoretical calculation was performed by applying P4 / mmm, which is a tetragonal structure. The new alloy was chosen by designing theoretical values close to existing materials. Considering elements that contribute to corrosion, most have high prices. Therefore, the design was completed by adjusting the content using only the components of the reference material in the theoretical design. The final design alloys were chosen as D6 and D9. Designed D6 and D9 were dissolved and prepared using an induction furnace. After the heat treatment process was completed, the corrosion rate of the alloys was confirmed by using the potentiodynamic polarization test. The surface of the prepared alloys were processed horizontally and then polished to # 1200 using sand paper to perform potentiodynamic polarization test. Domestic products: 4.735 mpy (mils / year), D6: 0.9166 mpy, D9: 0.3372 mpy, alloys designed than domestic products had a lower corrosion rate. Therefore, the designed alloy was expected to have better erosion resistance.
목차
Abstract
1. 서론
2. 실험방법
3. 결과 및 고찰
4. 결론
References
참고문헌 (22)
참고문헌 신청
H.-J. Lee and M.-S. Kim, Behavior of the Surface Precipitation of Manganese Oxides during Hot-dip Galvanizing, J. Korean Inst. Surf. Eng., 48(1) (2015) 27?32.
M.-H. Hong, G.-S. Hwang, and J.-H. Chung, Surface Treatment: Microstructure of Surface Defects Observed on Continuous Hot - dip Galvanized and Galvannealed Coating Steels, J. Kor. Inst. Met. & Mater., 40(1) (2002) 83-92.
T.-S. Shin, Cost Comparisons between the Hot-dip Galvanizing and the Paintion for Structural Steel, Journal of the Architectural and urban Institute, 1 (2002) 93-100.
Adachi Hirohiko, Tsukada Masaru and Satoko Chikatoshi, Discrete Variational Xα Cluster Calculations. I. Application to Metal Clusters, Journal of the Physical Society of Japan, 45(3) (1978) 875-883.
C.-D. Lee, S.-S. Choi, C.-S. Kang and K.-S. Shin, Effects of Solidification Rate on Microstructure and Mechanical Properties of AZ91D Magnesium Alloy, Korean journal of metals and materials, 38(9) (2000) 1225-1232.
M.-H. Hong, G.-S. Hwang, and J.-H. Chung, Surface Treatment: Microstructure of Surface Defects Observed on Continuous Hot - dip Galvanized and Galvannealed Coating Steels, J. Kor. Inst. Met. & Mater., 40(1) (2002) 83-92.
T.-S. Shin, Cost Comparisons between the Hot-dip Galvanizing and the Paintion for Structural Steel, Journal of the Architectural and urban Institute, 1 (2002) 93-100.
Adachi Hirohiko, Tsukada Masaru and Satoko Chikatoshi, Discrete Variational Xα Cluster Calculations. I. Application to Metal Clusters, Journal of the Physical Society of Japan, 45(3) (1978) 875-883.
C.-D. Lee, S.-S. Choi, C.-S. Kang and K.-S. Shin, Effects of Solidification Rate on Microstructure and Mechanical Properties of AZ91D Magnesium Alloy, Korean journal of metals and materials, 38(9) (2000) 1225-1232.
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