Effect of Chloride on the Pitting Corrosion of Carbon Steel in Alkaline Solutions
Article 2022 en
Authors
JQ
Jie Qiu
YZ
Yakun Zhu
YX
Yi Xu
Abstract
1 min read
The effect of chloride concentration on the passivity breakdown of carbon steel in deaerated pH = 13.5 alkaline solution was investigated. The results show that chloride plays an important role for the pitting corrosion of carbon steel. When NaCl <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mo>≤</mml:mo> <mml:mspace width=".25em"/> <mml:mn>1</mml:mn> <mml:mspace width=".25em"/> <mml:mi mathvariant="normal">M</mml:mi> <mml:mo>,</mml:mo> </mml:math> the carbon steel is passive but for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mn>1</mml:mn> <mml:mspace width=".25em"/> <mml:mi mathvariant="normal">M</mml:mi> <mml:mo><</mml:mo> </mml:math> NaCl < 2 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi mathvariant="normal">M</mml:mi> <mml:mo>,</mml:mo> </mml:math> the carbon steel transfers from passive to passivity breakdown. When NaCl <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mo>≥</mml:mo> <mml:mspace width=".25em"/> <mml:mn>2</mml:mn> <mml:mspace width=".25em"/> <mml:mi mathvariant="normal">M</mml:mi> <mml:mo>,</mml:mo> </mml:math> passive film breakdown occurs and the passivity breakdown potential ( E b ) of carbon steel is linearly-dependent on the logarithm of the chloride activity in the alkaline solution. As predicted by the PDM, the near-normal distribution of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msub> <mml:mrow> <mml:mi>E</mml:mi> </mml:mrow> <mml:mrow> <mml:mi>b</mml:mi> </mml:mrow> </mml:msub> </mml:math> is well indicated by the near straight line in the cumulative distribution probability. The analysis in this study gives us a method to calculate the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msub> <mml:mrow> <mml:mi>E</mml:mi> </mml:mrow> <mml:mrow> <mml:mi>b</mml:mi> </mml:mrow> </mml:msub> </mml:math> of carbon steel in alkaline solution and its distribution for any given chloride concentration.
Emily Heppell, Ryuji Fujita, Gautam Gurung, Jheng-Cyuan Lin, Andrew F. May, Michael Foerster, Muhammad Waqas Khaliq, Miguel Ángel Niño, Manuel Valvidares, Javier Herrero‐Martín, Pierluigi Gargiani, Kenji Watanabe, Takashi Taniguchi, D. Backes, G. van der Laan, T. Hesjedal
Shuai-Qing Jiang, D. Xu, Agnes P. C. van Hoof, Wei‐Hua Lei, Yuan Liu, Hao Zhou, Yong Chen, Shao-Yu Fu, Jun Yang, Xing Liu, Zi-Pei Zhu, Alexei V Filippenko, P. G. Jonker, A. Pozanenko, He Gao, Xue-Feng Wu, Bing Zhang, Gavin P. Lamb, M. de Pasquale, Shiho Kobayashi, F. E. Bauer, Hui Sun, G. Pugliese, Jie An,
Lizvette Villafaña, P. R. Williams, Tommaso Treu, Brendon J. Brewer, Aaron J. Barth, U Vivian, Vardha N. Bennert, Hengxiao Guo, Misty C. Bentz, Gabriela Canalizo, Alexei V Filippenko, E. L. Gates, M. D. Joner, Matthew A. Malkan, Jong-Hak Woo, Bela Abolfathi, Thomas Bohn, K. Azalee Bostroem, Andrew Brandel, Thomas G. Brink, Sanyum Channa, Maren Cosens, Edward Donohue, Goni Halevi, Carol E. Hood,
.webp){kind=small}
Discussion(0)
No comments yet. Be the first to comment.