BEM Numerical Modeling and Experimental Verification of Cathodic Protection for Offshore Structures

Article Preview

Abstract:

The progresses and theoretical methodology of computer modeling of cathodic protection using the boundary element method (BEM) are outlined. To test the effectiveness and accuracy of BEM numerical modeling of cathodic protection for offshore structures, a miniature model offshore jacket with a sacrificial anode was built and put in a test pool full of seawater. Cathodic protection potentials on different positions were measured and compared with the values obtained from computer modeling. The results show good agreement between measured value and numerical simulated value. The factors that led to discrepancy in the two groups of data were discussed.

You might also be interested in these eBooks

Info:

Periodical:

Pages:

617-623

Citation:

Online since:

September 2011

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2011 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

[1] R. D. Strommen, " Computer modelling of Cathodic Protection Systems Utilised in CP Monitoring", ASTM STP 1154, Philadelphia, 1992, p.229 – 447

Google Scholar

[2] R. A. Adey, "Modelling C P Systems", Oilman, June 1985.

Google Scholar

[3] S. M. Niku, C. A. Brebbia, R. A. Adey, "BEASY-CP. A CAD systems for Mathematical Modelling of Galvanic Corrosion and Cathodic Protection Problems", CADMO.86, Washington, DC, USA, September 1986, Computational Mechanics Publications, Southampton and Springer-Verlag, Berlin & NY, 1986.

Google Scholar

[4] J. W. Fu, S. K. Chow, "Cathodic Protection Designs Using an Integral Equation Numerical Method", Corrosion/82, Paper No. 163, 1982.

Google Scholar

[5] P. O. Gartland, R. Johnsen, "COMCAPS – Computer Modelling of Cathodic Protection Systems", Corrosion/85, Boston, Massachusetts, USA., March 1985.

Google Scholar

[6] J. C. F. Telles, W. J. Mansur, L. C. Wrobel, M. G. Marinho, "Numerical Simulation of a Cathodically Protected Semisubmersible Platform Using the PROCAT System", Corrosion, Vol. 46, No. 6, 1990, pp.513-518

DOI: 10.5006/1.3585141

Google Scholar

[7] N. G. Zamani, J. F. Porter, A. Mufti, " A survey of Computational Effects in the Field of Corrosion Engineering", Journal of International Numerical Methods in Engineering. Vol. 23, 1986.

DOI: 10.1002/nme.1620230708

Google Scholar

[8] E. A. De Carlo, "Computer Techniques for Offshore Corrosion Protection", Lockheed Horizons, Winter 1980/81.

Google Scholar

[9] E. A. De Carlo,"Computer Aided Cathodic Protection Design Technique for Complex Offshore Structures", Paper No. 165, Corrosion/82, March 1982.

Google Scholar

[10] R. A. Adey, S. M. Niku, "Comparison between boundary elements and finite elements for CAD of Cathodic Protection Systems", BETECH Conference, South Australian Institute of Technology, Adelaide, Australia, Nov 1985. Computational Mechanics Publications, Southampton, 1985.

Google Scholar

[11] Danson, D. J., Warne, M. A.: "Current Density/Voltage Calculations using Boundary Element Techniques", NACE Conference, Los Angeles, USA, 1983.

Google Scholar

[12] B.W. Cherry, M. Foo, T. H. Siauw, "Boundary Element Analysis of the Potential Field Associated with a Corroding, Electrode, Corrosion, NACE, 1986, vol 42, no 11, pp.654-682

DOI: 10.5006/1.3583037

Google Scholar

[13] R. Strommen, W. Keim, J. Finnegan, P. Mehdizadeh, "Advances in offshore cathodic protection modeling using the boundary element method", Materials Performance, Feb., 1987, pp.23-28.

Google Scholar

[14] R. A. Adey, S. M. Niku, C. A. Brebbia, J. Finnegan, "Computer Aided Design of Cathodic Protection Systems", Paper presented at the International Conference on Boundary Element Methods in Engineering, Villa Olmo, Lake Como, Italy, 24th-27th September 1985.

DOI: 10.1016/s0141-1187(86)80037-2

Google Scholar

[15] M. H. Peterson, "Physical and Mathematical Modeling of Current Distribution and Cathodic Protection", 8th Inter-naval Corrosion Conference, Proceedings, Plymouth, England, 1988, pp.1-9

Google Scholar

[16] R. A. Adey, S. M. Niku, "Computer Modeling of Corrosion using the Boundary Element Method", ASTM STP 1154, pp.248-264 (1992) American Society of Testing and Materials, Philadelphia, (1992)

DOI: 10.1520/stp24701s

Google Scholar

[17] Jimmy X. Jia, Guangling Song, Andrej Atrens , "Experimental Measurement and Computer Simulation ofGalvanic Corrosion of Magnesium Coupled to Steel", Advanced Engineering Meterials 2007, 9, No. 1–2, pp.65-74

DOI: 10.1002/adem.200600206

Google Scholar

[18] V. G. DeGiorgi, "Influence of Seawater Composition on Corrosion Prevention System Parameters", Boundary Element Technology XII, Computational Mechanics Publication, 1997, pp.475-583

Google Scholar