Evaluation on the Corrosion Resistance of Three Types of Galvanizing Steels in 1% H2SO4 Solution
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
Galvanizing method has been extensively used to the numerous constructional steels such as a guard rail of high way, various types of structural steel for ship building and various types of steels for the industrial fields etc.. However, the galvanized structures would be inevitably corroded rapidly with increasing exposed time because an acid rain due to environmental contamination has been much dropped more and more. Therefore, it has been made an effort to improve the corrosion resistance of the galvanizing film through various methods. In this study, comparison evaluation on the corrosion resistance of three types of the samples, that is, the hot dip galvanizing with pure zinc(GI), the hot dip galvanizing of alloy bath with zinc and aluminum(GL) and the pure zinc galvanizing steel immersed again to chromate treatment bath(Chro.)were investigated using electrochemical methods in 1% H2SO4 solution. The Chro. and GI samples exhibited the highest and lowest corrosion resistance respectively in 1% H2SO4 solution, however, the GI sample revealed the highest impedance at 0.01 Hz due to its high resistance polarization caused by corrosion products deposited on the surface, while Chro. sample exhibited the lowest impedance at 0.01 Hz because of little corrosion products on the surface. Consequently, it is suggested that the chromate treated steel has a better corrosion resistance in acid environment compared to pure galvanizing(GI) or galvalume(GL) steels.
Abstract
Galvanizing method has been extensively used to the numerous constructional steels such as a guard rail of high way, various types of structural steel for ship building and various types of steels for the industrial fields etc.. However, the galvanized structures would be inevitably corroded rapidly with increasing exposed time because an acid rain due to environmental contamination has been much dropped more and more. Therefore, it has been made an effort to improve the corrosion resistance of the galvanizing film through various methods. In this study, comparison evaluation on the corrosion resistance of three types of the samples, that is, the hot dip galvanizing with pure zinc(GI), the hot dip galvanizing of alloy bath with zinc and aluminum(GL) and the pure zinc galvanizing steel immersed again to chromate treatment bath(Chro.)were investigated using electrochemical methods in 1% H2SO4 solution. The Chro. and GI samples exhibited the highest and lowest corrosion resistance respectively in 1% H2SO4 solution, however, the GI sample revealed the highest impedance at 0.01 Hz due to its high resistance polarization caused by corrosion products deposited on the surface, while Chro. sample exhibited the lowest impedance at 0.01 Hz because of little corrosion products on the surface. Consequently, it is suggested that the chromate treated steel has a better corrosion resistance in acid environment compared to pure galvanizing(GI) or galvalume(GL) steels.
참고문헌 (9)
- 정병호, "316 스테인리스강의 입계부식에 미치는 열사이클과응력의 영향", 한국마린엔지니어링학회지, 30(6), pp.709~715 (2006), 한국마린엔지니어링학회
- 김성종, "선박용 고강도 Al 합금(5456-H116)의 최적 방식의 전위결정에 관한 연구", 한국마린엔지니어링학회지, 30(1), pp.157~168 (2006), 한국마린엔지니어링학회
- 윤대현, "주조용 Al합금의 내식성에 관한 전기화학적 평가", 한국마린엔지니어링학회지, 29(5), pp.495~501 (2005), 한국마린엔지니어링학회
- Denny A. Jones, "PRINCIPLES AND PREVENTION OF CORROSION", pp.398~ (1991), Maxwell Macmillian International Publishing Group
- "Corrosion Control Manual of Harbor Steel Structure", The Techonlogy Center of the Coastal Development, 21~ (1987)
- W. V. Baeckmann, "Handbook of CATHODIC CORROSION PROTECTION", pp.180~ (1997), Guef publishing Company
- M. G. Fontana, "Corrosion Engineering", pp.39~ (1978), McGraw-Hill, Inc
- K. M. Moon, "Practical Electrochemistry", pp.177~ (1999), Edited by Hyou Sung Co. Ltd
- 문경만, "용사 도막의 내식성에 관한 전기화학적 평가", 한국마린엔지니어링학회지, 34(5), pp.670~677 (2010), 한국마린엔지니어링학회