Browse > Article
http://dx.doi.org/10.5916/jkosme.2014.38.4.409

Evaluation of the corrosion property on the welded zone of forged steel piston crown with types of filler metals  

Moon, Kyung-Man (College of Engineering, Korea Maritime and Ocean University)
Won, Jong-Pil (College of Engineering, Korea Maritime and Ocean University)
Lee, Myeong-Hoon (College of Engineering, Korea Maritime and Ocean University)
Baek, Tae-Sil (Department of steel industry, Pohang College)
Kim, Jin-Gyeong (Education Division, Korea Institute of Maritime and Fisheries Technology)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.38, no.4, 2014 , pp. 409-417 More about this Journal
Abstract
Since the oil price has been significantly jumped for recent some years, the diesel engine of the merchant ship has been mainly used the heavy oil of low quality. Thus, it has been often exposed to severely corrosive environment more and more because temperature of the exhaust gas in a combustion chamber is getting higher and higher with increasing of using the heavy oil of low quality. As a result, wear and corrosion of most parts surrounded with combustion chamber is more serious compared to the other parts of the engine. Therefore, an optimum weldment for these parts is very important to prolong their lifetime in a economical point of view. In this study, four types of filler metals such as Inconel 625, 718, 1.25Cr-0.5Mo and 0.5Mo were welded with SMAW and GTAW methods in the forged steel which would be generally used with piston crown material. And the corrosion properties of weld metal, heat affected zone and base metal were investigated using electrochemical methods such as measurement of corrosion potential, anodic polarization curves, cyclic voltammogram and impedance etc. in 35% H2SO4 solution. The weld metal and base metal exhibited the best and worst corrosion resistance in all cases of filler metals. In particular, the weld metal welded with filler metals of Inconel 718 revealed the best corrosion resistance among the filler metals, and Inconel 625 followed the Inconel 718. Hardness relatively indicated higher value in the weld metal compared to the base metal. Furthermore, Inconel 625 and 718 indicated higher values of hardness compared to 1.25cr-0.5Mo and 0,5Mo filler metals in the weld metal.
Keywords
Corrosion Potential; Galvanic Cell; Weld Metal; Heat Affected Zone; Arc Welding;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 L. W. Tsay, W. L. Lin, S. W. Chenct, and G. S. Leu, "Hydrogen sulphide stress corrosion cracking of 2.25 Cr-Mo steel weldments", Corrosion Science, vol. 39, no. 7, pp. 1165-1176, 1997.   DOI   ScienceOn
2 D. H. Jeon and J. G. Kim "A study on electrochemical protection diagrams of steel in nitric and sulfuric acid solutions", Journal of the Korean Society of Marine Engineering, vol. 13, no. 2, pp. 156-157, 1989 (in Korean).
3 S. H. Ahn, J. H. Jeong, and K. W. Nam, "Evaluation of characteristic for SS400 and STS304 steel by weld thermal cycle simulation," Journal of Ocean Engineering and Technology, vol. 19, no. 4, pp. 64-71, 2005 (in Korean).
4 D. H. Jeon, Control of the Corrosion and Anti-corrosion, Busan, Iljoongsha, pp. 294-298, 1985 (in Korean).
5 M. K. Shin, New Edition Workshop Practice, Ah Sung Publishing Co., pp. 242-245, 1984(in Korean).
6 K. M. Moon, Practical Electrochemistry, Hyosung Publishing Co., pp. 177, 1999 (in Korean).
7 M. G. Fontana, Corrosion Engineering, Mc Graw-Hill Book Company, pp. 501, 1987.
8 D. H. Jeon, Control of the Corrosion and Anti-corrosion, Busan, Iljoongsha, pp. 426-428, 1985 (in Korean).
9 J. G. Kim, M. S. Kang, and Y. S. Kim, "A study on characteristics of repair welding for cast iron part of diesel engine for ship," Journal of Ocean Engineering and Technology, vol. 20, no. 2, pp. 41-45, 2006 (in Korean).   과학기술학회마을
10 D. L. Piron, The Electrochemical of Corrosion, Published by NACE 1440, South Creek Drive, Houston, pp. 118, 1991.
11 K. R. Trethewey and J. Chamberlain, Corrosion for Science and Engineering, British Library Cataloguing in Publication Data, pp. 99, 1995.
12 I. H. Lo, M. C. Lee, K. Y. Lim, W. Ho, G. C. Y. Yang, and W. T. Tsai, "Effect of heat treatment on the pitting corrosion behavior of 347SS weld overlay", Corrosion Science and Technology, vol. 31, no. 5, pp. 361-367, 2002.
13 K. M. Moon, M. H. Lee, K. J. Kim, J. G. Kim, and S. J. Kim, "A study on the post-weld heat treatment effect to mechanical properties and hydrogen embrittlement for heating affected zone of a RE36 steel", Corrosion Science and Technology, vol. 2, no. 6, pp. 283-288, 2003 (in Korean).
14 P. D. Bilmes, C. L. Liorente, Saire Huaman, L. M. Gassa, and C. A. Gervasi, "Microstructure and pitting corrosion of 13CrNiMo weld metal", Corrosion Science, vol. 48, pp. 3261-3270, 2006.   DOI   ScienceOn