Effect of Alternating Current on the Cathodic Protection and Interface Structure of X80 Steel

This study employs potential-monitoring techniques, cyclic voltammetry tests, alternating current (AC) voltammetry methods, and surface characterization to investigate the AC corrosion of cathodically protected X80 pipeline steel. In a non-passive neutral solution at pH 7.2, a sufficiently negative...

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Detalles Bibliográficos
Autores principales: Wang, Huiru, Du, Cuiwei, Liu, Zhiyong, Wang, Luntao, Ding, De
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2017
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5578217/
https://www.ncbi.nlm.nih.gov/pubmed/28773211
http://dx.doi.org/10.3390/ma10080851
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author Wang, Huiru
Du, Cuiwei
Liu, Zhiyong
Wang, Luntao
Ding, De
author_facet Wang, Huiru
Du, Cuiwei
Liu, Zhiyong
Wang, Luntao
Ding, De
author_sort Wang, Huiru
collection PubMed
description This study employs potential-monitoring techniques, cyclic voltammetry tests, alternating current (AC) voltammetry methods, and surface characterization to investigate the AC corrosion of cathodically protected X80 pipeline steel. In a non-passive neutral solution at pH 7.2, a sufficiently negative potential completely protects steel at an AC current density of 100 A/m(2). In an alkaline solution at pH 9.6, more serious AC corrosion occurs at more negative cathodic protection (CP) potential, whereas without CP the steel suffers negligible corrosion. In addition, the interface capacitance increases with AC amplitude. Based on these results, the AC corrosion mechanisms that function under various conditions are analyzed and described.
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spelling pubmed-55782172017-09-05 Effect of Alternating Current on the Cathodic Protection and Interface Structure of X80 Steel Wang, Huiru Du, Cuiwei Liu, Zhiyong Wang, Luntao Ding, De Materials (Basel) Article This study employs potential-monitoring techniques, cyclic voltammetry tests, alternating current (AC) voltammetry methods, and surface characterization to investigate the AC corrosion of cathodically protected X80 pipeline steel. In a non-passive neutral solution at pH 7.2, a sufficiently negative potential completely protects steel at an AC current density of 100 A/m(2). In an alkaline solution at pH 9.6, more serious AC corrosion occurs at more negative cathodic protection (CP) potential, whereas without CP the steel suffers negligible corrosion. In addition, the interface capacitance increases with AC amplitude. Based on these results, the AC corrosion mechanisms that function under various conditions are analyzed and described. MDPI 2017-07-25 /pmc/articles/PMC5578217/ /pubmed/28773211 http://dx.doi.org/10.3390/ma10080851 Text en © 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wang, Huiru
Du, Cuiwei
Liu, Zhiyong
Wang, Luntao
Ding, De
Effect of Alternating Current on the Cathodic Protection and Interface Structure of X80 Steel
title Effect of Alternating Current on the Cathodic Protection and Interface Structure of X80 Steel
title_full Effect of Alternating Current on the Cathodic Protection and Interface Structure of X80 Steel
title_fullStr Effect of Alternating Current on the Cathodic Protection and Interface Structure of X80 Steel
title_full_unstemmed Effect of Alternating Current on the Cathodic Protection and Interface Structure of X80 Steel
title_short Effect of Alternating Current on the Cathodic Protection and Interface Structure of X80 Steel
title_sort effect of alternating current on the cathodic protection and interface structure of x80 steel
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5578217/
https://www.ncbi.nlm.nih.gov/pubmed/28773211
http://dx.doi.org/10.3390/ma10080851
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AT ducuiwei effectofalternatingcurrentonthecathodicprotectionandinterfacestructureofx80steel
AT liuzhiyong effectofalternatingcurrentonthecathodicprotectionandinterfacestructureofx80steel
AT wangluntao effectofalternatingcurrentonthecathodicprotectionandinterfacestructureofx80steel
AT dingde effectofalternatingcurrentonthecathodicprotectionandinterfacestructureofx80steel

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