POTENTIAL DISTRIBUTION ON CATHODICALLY PROTECTED EXTERNAL TANK BOTTOM

J Chin Soc Corr Pro

1996, Vol. 16

Issue (1): 29-36 DOI:

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POTENTIAL DISTRIBUTION ON CATHODICALLY PROTECTED EXTERNAL TANK BOTTOM

Qiu Feng;Xu Naixin

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Abstract The potential distribution on external bottom of storage tank with cathodic protection is not uniform．The finite element method was applied to calculate the potential distribution and current distribution under various conditions．In the calculations various factors were considered, including soil resistivity,surface condition of tank bottom, number of anodes and their arrangement as well as cathodic polarization performance,etc．The analysis accommodated the combination of these factors as variable parameters．The results obtained could be used to interpret characteristics of the cathodic protection system．The calculation method can be recommended to engineering design for improvement of potential distribution.

Key words: Storage tank Cathodic protection Potential distribution Finite element method

Received: 25 February 1996

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Cite this article:

Qiu Feng;Xu Naixin. POTENTIAL DISTRIBUTION ON CATHODICALLY PROTECTED EXTERNAL TANK BOTTOM. J Chin Soc Corr Pro, 1996, 16(1): 29-36.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1996/V16/I1/29

1APIRP651-1992,CathodicProtectionofAbovegroundPetroleumStorageTanks2NACEStandardRP0193-93,EXternalCathodicProtectionofOn-GradeMetallicStorageTankBot-toms3GarrityKC,etal．MaterialsPerformance;1988,27(4):324NACETaskGroupT-7L-4,CollectedPapersonCathodicProtectionCurrentDistribution,NACE,Houston;19895曾余庚,徐国华,宋国乡．电磁场有限单元法,北京:科学出版社,19826ZienkiewiczOC．TheFiniteElementMethodinEngineeringScience,London:McGraw—HillBookCompanyt19717葛斗福,张宗旺,张承典,徐乃欣．中国腐蚀与防护学报,1992,12(2):149

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