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Method addresses effective CP for aboveground storage tanks

05/10/2010
By Abdul Wahab Al
Based on presentation to NACE Corrosion 2010 conference, San Antonio, Mar. 14-18, 2010.A Ti-MMO anode grid system placed between an aboveground storage tank's bottom surfaces and the secondary liner with properly distributed power-feed connections can protect the tank's bottom plates against external corrosion. Such systems can achieve uniform potentials along the tank bottom surfaces.Inappropriate distribution of power-feed cable, however, can cause a nonuniform potential profile. Proper distribution of power-feed connections along the grid is vital in designing AST-bottom CP systems.High contact resistance of reference cell to soil and electrochemical instability of permanently installe...
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