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11050 ICP Data: In-Situ Data Collection for Cathodic Protection Design

Picture for 11050 ICP Data: In-Situ Data Collection for Cathodic Protection Design
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Product Number: 51300-11050-SG
ISBN: 11050 2011 CP
Author: Dominique Festy, Denise Le Flour, Jean Vittonato, Ian Merchant and Sven Morten Hesjevik
Publication Date: 2011
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The present work was carried out with the objectives of supplying to CP designers data collected in situ, in the actual environment in which the protected structure is deployed. Sensors arrays have been deployed at six different sites from 35 m to 900 m depth. The measurements are based on the deployment of a CPC sensor which records the coupling current between a cathode and an anode, and the cathode potential.

The effect of temperature and pressure on calcareous deposit properties was put into evidence and was useful to explain the different pseudo polarization curves. For carbon steel: The results are broadly quite in a good agreement with standard and recomendation.

For stainless steel: The initial current was independent of the location; the steady state current demand at -600 mV/Ag.AgCl depends strongly on the environment ; the current demands tent to decrease with time in tropical and arctic zones, but increased in sub-tropical area and the current demand at - 950 mV/Ag.AgCl does not depend on the location.

Key words: Cathodic Protection; in situ data collection; deep sea; calcareous deposit; carbon steel; Stainless steel
The present work was carried out with the objectives of supplying to CP designers data collected in situ, in the actual environment in which the protected structure is deployed. Sensors arrays have been deployed at six different sites from 35 m to 900 m depth. The measurements are based on the deployment of a CPC sensor which records the coupling current between a cathode and an anode, and the cathode potential.

The effect of temperature and pressure on calcareous deposit properties was put into evidence and was useful to explain the different pseudo polarization curves. For carbon steel: The results are broadly quite in a good agreement with standard and recomendation.

For stainless steel: The initial current was independent of the location; the steady state current demand at -600 mV/Ag.AgCl depends strongly on the environment ; the current demands tent to decrease with time in tropical and arctic zones, but increased in sub-tropical area and the current demand at - 950 mV/Ag.AgCl does not depend on the location.

Key words: Cathodic Protection; in situ data collection; deep sea; calcareous deposit; carbon steel; Stainless steel
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