해양 금속재료의 부식속도와 방식전류에 미치는 유속의 영향
Effect of flow velocity on corrosion rate and corrosion protection current of marine material
1
조회
0
다운로드
11
인용
0
참고문헌
키워드
초록
In spite of highly advanced paint coating techniques, corrosion damage of marine metal and alloys increase more and more due to inherent micro-cracks and porosities in coatings formed during the coating process. Furthermore, flowing seawater conditions promote the breakdown of the protective oxide of the materials introducing more oxygen into marine environments, leading to the acceleration of corrosion. Various corrosion protection methods are available to prevent steel from marine corrosion. Cathodic protection is one of the useful corrosion protection methods by which the potential of the corroded metal is intentionally lowered to an immune state having the advantage of providing additional protection barriers to steel exposed to aqueous corrosion or soil corrosion, in addition to the coating. In the present investigation, the effect of flow velocity was examined for the determination of the optimum corrosion protection current density in cathodic protection as well as the corrosion rate of the steel. It is demonstrated from the result that the material corrosion under dynamic flowing conditions seems more prone to corrosion than under static conditions.
Abstract
In spite of highly advanced paint coating techniques, corrosion damage of marine metal and alloys increase more and more due to inherent micro-cracks and porosities in coatings formed during the coating process. Furthermore, flowing seawater conditions promote the breakdown of the protective oxide of the materials introducing more oxygen into marine environments, leading to the acceleration of corrosion. Various corrosion protection methods are available to prevent steel from marine corrosion. Cathodic protection is one of the useful corrosion protection methods by which the potential of the corroded metal is intentionally lowered to an immune state having the advantage of providing additional protection barriers to steel exposed to aqueous corrosion or soil corrosion, in addition to the coating. In the present investigation, the effect of flow velocity was examined for the determination of the optimum corrosion protection current density in cathodic protection as well as the corrosion rate of the steel. It is demonstrated from the result that the material corrosion under dynamic flowing conditions seems more prone to corrosion than under static conditions.
참고문헌 (9)
- Y. T. Kho, , J. Corros. Sci. Soc. of Kor, 27, pp.563~ (1998)
- 김상현, "원자력 발전소 탄소강 배관재의 유체가속부식에 미치는 용존 산소의 영향", 대한금속·재료학회지, 44(2), pp.108~114 (2006), 대한금속·재료학회
- D. S. Won, , Corros. Sci. Tech, 13, pp.24~ (1990)
- H. H. Huang, , Mater. Sci. Eng. A, 292, pp.90~ (2000)
- S. Giddey, , Corros. Sci, 43, pp.1497~ (2001)
- K. Denpo, , Corrosion, 49, pp.442~ (1993)
- G. Sahoo, , J. Met. Mater. Miner, 24, pp.1~ (2014)
- 장현영, "철근 부식에 미치는 염분 및음극방식의 효과에 대한 전기화학적 접근(I)", CORROSION SCIENCE AND TECHNOLOGY, 30(4), pp.196~205 (2001), 한국부식방식학회
- D. A. Jones, , Corrosion, 42, pp.430~ (1986)