Effect of Temperature on Electrochemical Corrosion Behavior of S135 Drill Steel with Disbonded Coating in 3.5% KCl Solution

XU Tian-han; YANG Bao; WANG Dang-hui; LIU Yong-gang; WANG Rong

doi:10.11973/fsyfh-201608008

Corrosion & Protection > 2016 > 37(8): 644-647. > DOI: 10.11973/fsyfh-201608008

XU Tian-han, YANG Bao, WANG Dang-hui, LIU Yong-gang, WANG Rong. Effect of Temperature on Electrochemical Corrosion Behavior of S135 Drill Steel with Disbonded Coating in 3.5% KCl Solution[J]. Corrosion & Protection, 2016, 37(8): 644-647. DOI: 10.11973/fsyfh-201608008

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Effect of Temperature on Electrochemical Corrosion Behavior of S135 Drill Steel with Disbonded Coating in 3.5% KCl Solution

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Received Date: May 03, 2015

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Abstract

Based on theoretical analysis and electrochemical measurement techniques, the effect of temperature on electrochemical corrosion behavior of S135 drill steel with disbonded coating in 3.5% KCl solution was studied. The results indicated that the open circuit potential of drill steel with disbonded coating shifted towards negative direction with the increase of temperature； the thermodynamic state of the material significantly changed in the range of 40-65 ℃ and the overall reaction was mainly controlled by the anodic reaction, with the increase of temperature, the reaction rate increased firstly and decreased sequently, reached a maximum at 65 ℃.The temperature mainly influenced the ionic charge transfer reaction processes and thus influenced the corrosion rate.
- S135 drill pipe steel,
- disbonded coating,
- KCl solution,
- electrochemical test

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Effect of Temperature on Electrochemical Corrosion Behavior of S135 Drill Steel with Disbonded Coating in 3.5% KCl Solution

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