[국내논문]탄소강 해수배관 내면 방식을 위한 불용성 양극의 음극방식 효과 Cathodic protection using insoluble anodes by delivering protection currents to the inner surfaces of carbon steel seawater pipes원문보기
선박, 해양플랜트, 원자력 발전소와 같은 에너지 플랜트 설비들은 연속적인 냉각이 필요하기 때문에 보통 해수 공급이 원활한 공해상이나 해안가에 설치된다. 이들의 냉각 배관은 보통 탄소강 배관이 사용되는데 해수의 염분으로 인해 용접부위 및 배관 내면 결함부위의 부식으로 예상하지 못한 시기에 돌발적으로 부식파공으로 인한 누설사고가 빈번하게 발생된다. 이러한 해수 환경에서 금속의 부식방지를 위한 방법으로 희생양극법과 외부전원법과 같은 음극방식법이 주로 적용되고 있다. 본 연구에서는 해수배관 내면의 부식을 방지하기 위하여 외부전원법을 적용하고, 외부전원식 불용성 양극에 대한 방식특성을 실험적으로 연구하였다. 외부전원법에 의한 최적 방식조건을 규명하기 위하여 실험을 실시한 결과 방식전류의 전달거리, 갈바닉 부식의 억제효과, 최적 방식전위를 확인할 수 있었다.
선박, 해양플랜트, 원자력 발전소와 같은 에너지 플랜트 설비들은 연속적인 냉각이 필요하기 때문에 보통 해수 공급이 원활한 공해상이나 해안가에 설치된다. 이들의 냉각 배관은 보통 탄소강 배관이 사용되는데 해수의 염분으로 인해 용접부위 및 배관 내면 결함부위의 부식으로 예상하지 못한 시기에 돌발적으로 부식파공으로 인한 누설사고가 빈번하게 발생된다. 이러한 해수 환경에서 금속의 부식방지를 위한 방법으로 희생양극법과 외부전원법과 같은 음극방식법이 주로 적용되고 있다. 본 연구에서는 해수배관 내면의 부식을 방지하기 위하여 외부전원법을 적용하고, 외부전원식 불용성 양극에 대한 방식특성을 실험적으로 연구하였다. 외부전원법에 의한 최적 방식조건을 규명하기 위하여 실험을 실시한 결과 방식전류의 전달거리, 갈바닉 부식의 억제효과, 최적 방식전위를 확인할 수 있었다.
Energy plant facilities, such as vessels, offshore plants, and nuclear generating stations, are usually installed in open seas or coastal areas where a sufficient supply of seawater, required for continuous cooling, can be easily ensured. Carbon steels are normally used for cooling pipes, however, a...
Energy plant facilities, such as vessels, offshore plants, and nuclear generating stations, are usually installed in open seas or coastal areas where a sufficient supply of seawater, required for continuous cooling, can be easily ensured. Carbon steels are normally used for cooling pipes, however, accidental leakages can occur due to corrosion in the weld area of the coolant pipe metal and the defect areas inside of the pipes. In such seawater environments, cathodic protection using sacrificial anodes and impressed currents is adopted in order to prevent corrosion. In this study, impressed current cathodic protection was applied to prevent the corrosion occurring inside of seawater pipes, and the characteristics of the protection of insoluble anodes were experimentally investigated. From the results of the experiments involving carbon steel, which is the material used in seawater pipes, the throwing distance of the cathodic protection currents, suppression effects of galvanic corrosion, and optimum potentials for cathodic protection could be determined.
Energy plant facilities, such as vessels, offshore plants, and nuclear generating stations, are usually installed in open seas or coastal areas where a sufficient supply of seawater, required for continuous cooling, can be easily ensured. Carbon steels are normally used for cooling pipes, however, accidental leakages can occur due to corrosion in the weld area of the coolant pipe metal and the defect areas inside of the pipes. In such seawater environments, cathodic protection using sacrificial anodes and impressed currents is adopted in order to prevent corrosion. In this study, impressed current cathodic protection was applied to prevent the corrosion occurring inside of seawater pipes, and the characteristics of the protection of insoluble anodes were experimentally investigated. From the results of the experiments involving carbon steel, which is the material used in seawater pipes, the throwing distance of the cathodic protection currents, suppression effects of galvanic corrosion, and optimum potentials for cathodic protection could be determined.
Y. Huang and D. Ji, "Experimental study on seawater-pipeline internal corrosion monitoring system," Sensors and Actuators B: Chemical, vol. 135, no. 1, pp. 375-390, 2008.
J. H. Jeong, Y. H. Kim, K. M. Moon, M. H. Lee, and J. G. Kim, "Evaluation of the corrosion property on the welded zone of seawater pipe by A.C shielded metal arc welding," Journal of the Korean Society of Marine Engineering, vol. 37, No. 8, pp. 877-885, 2013 (in Korean).
V. Kain, S. Roychowdhury, T. Mathew, and A. Bhandakkar, "Flow accelerated corrosion and its control measures for the secondary circuit pipelines in Indian nuclear power plants," Journal of Nuclear Materials, vol. 383, no. 1-2, pp. 86-91, 2008.
Denny A. Jones, Principles and Prevention of Corrosion, Prentice Hall, Inc., pp 19-132, 1996.
K. S. Han, J. H. Park, Y. B. Park, S. J. Kim, H. D. Kim, Y. J. Choi, I. C. Choi, and S. H. Hong, "Effect of residual chlorine concentration on water pipe corrosion and corrosion control plan," Corrosion Science and Technology, vol. 17, no. 1, pp. 12-19, 2018.
J. A. Jeong, Y. K. Choo, C. K. Jin and K. W. Park, "Numerical analysis results of the cathodic protection for the underground steel pipe by anode installation method," Journal of the Korean Society of Marine Engineering, vol. 38, no. 10, pp. 1212-1216, 2014.
H. McArthur, S. D'Arch, and J. Barker, "Cathodic protection by impressed DC currents for construction, maintenance and refurbishment in reinforced concrete," Construction and Building Materials, vol. 7, pp. 85-93, 1993.
P. C. S. Hayfield and M. A. Warne, "Titanium based mesh anode in the cathodic protection of reinforcing bars in concrete" Construction and Building Materials, vol. 3, no. 3, pp. 152-158, 1989.
J. A Jeong, and C. K. Jin, "Utilization of variable resistor for improvement of impressed current cathodic protection system on reinforced concrete structures," Advanced Materials Research, vol. 1125, pp. 365-369, 2015.
W. T. Son, W. S. Hwang, Y. O. Ahn, and Y. S. Park, "A study on galvanic corrosion of Cu - 30Ni in sea water," Journal of the Corrosion Science Society of Korea, vol. 11, no. 4, pp. 21-32, 1982 (in Korean).
F. Mansfeld, G. Liu, H. Xiao, C. H. Tsai, and B. J. Little, "The corrosion behavior of copper alloys, stainless steels and titanium in seawater," Corrosion Science, vol. 36, no. 12, pp. 2063-2095, 1994.
AI-Helper
※ AI-Helper는 부적절한 답변을 할 수 있습니다.