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08305 Long Term Behavior of Ceramic Tubular Shaped Anodes for Cathodic Protection Applications

Picture for 08305 Long Term Behavior of Ceramic Tubular Shaped Anodes for Cathodic Protection Applications
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Product Number: 51300-08305-SG
ISBN: 08305 2008 CP
Author: George Sergi, David Simpson, P. C. S. Hayfield
Publication Date: 2008
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Although stable, the titanium sub-oxide ceramic is known to slowly polarise when subjected to extreme cathodic current densities so it was important to determine their longevity under such strong polarising conditions. A long term programme was, therefore, initiated in 1994 with the objective of monitoring the performance of anodes embedded in steel reinforced concrete blocks over a period of between 7 and 12 years under a range of polarising levels. The work was supplemented by subjecting tubular anodes to the NACE Standard Test Method (NACE Standard TM0294-2001) at normal and four times normal current densities by surface area of the anode at equivalent charge levels of up to 100 years at 110mA/m2 and 900mA/m2. Electrochemical results indicated a very good performance of the anodes over the test period and showed clearly that any polarisation of the anodes was acceptably low.
Although stable, the titanium sub-oxide ceramic is known to slowly polarise when subjected to extreme cathodic current densities so it was important to determine their longevity under such strong polarising conditions. A long term programme was, therefore, initiated in 1994 with the objective of monitoring the performance of anodes embedded in steel reinforced concrete blocks over a period of between 7 and 12 years under a range of polarising levels. The work was supplemented by subjecting tubular anodes to the NACE Standard Test Method (NACE Standard TM0294-2001) at normal and four times normal current densities by surface area of the anode at equivalent charge levels of up to 100 years at 110mA/m2 and 900mA/m2. Electrochemical results indicated a very good performance of the anodes over the test period and showed clearly that any polarisation of the anodes was acceptably low.
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