Understanding pit initiation of pipeline steel X100 under cathodic protection potential fluctuating with various duty cycles
The square wave polarisation technique and mathematical/electrochemical models were combined to investigate pitting corrosion of pipeline steel X100 under cathodic protection potential fluctuations with different duty cycles (δ). Mathematical equations were derived to describe the increased potentia...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-12-01
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| Series: | Corrosion Communications |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2667266923000403 |
| _version_ | 1797384969638641664 |
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| author | Mingjie Dai Y. Frank Cheng Zhen Wang Feng Huang Qian Hu Jing Liu |
| author_facet | Mingjie Dai Y. Frank Cheng Zhen Wang Feng Huang Qian Hu Jing Liu |
| author_sort | Mingjie Dai |
| collection | DOAJ |
| description | The square wave polarisation technique and mathematical/electrochemical models were combined to investigate pitting corrosion of pipeline steel X100 under cathodic protection potential fluctuations with different duty cycles (δ). Mathematical equations were derived to describe the increased potential of the double-charge layer at the steel/solution interface, which increases density from 1100 mm−2 (δ = 10%) to over 6600 mm−2 (δ = 50%). However, an electrochemical model was developed to present the formation of an amorphous corrosion product layer, which reduces the number of local anodic corrosion areas and decreases pitting density when δ is higher than 50%. |
| first_indexed | 2024-03-08T21:47:23Z |
| format | Article |
| id | doaj.art-aa1db1920f5c42cc94ea811442b8aa94 |
| institution | Directory Open Access Journal |
| issn | 2667-2669 |
| language | English |
| last_indexed | 2024-03-08T21:47:23Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Corrosion Communications |
| spelling | doaj.art-aa1db1920f5c42cc94ea811442b8aa942023-12-20T07:39:35ZengElsevierCorrosion Communications2667-26692023-12-01121118Understanding pit initiation of pipeline steel X100 under cathodic protection potential fluctuating with various duty cyclesMingjie Dai0Y. Frank Cheng1Zhen Wang2Feng Huang3Qian Hu4Jing Liu5The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China; Hubei Engineering Technology Research Center of Materials and Service Safety, Wuhan University of Science and Technology, Wuhan 430081, ChinaDepartment of Mechanical Engineering, University of Calgary, Alberta T2 N 1N4, CanadaThe State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China; Hubei Engineering Technology Research Center of Materials and Service Safety, Wuhan University of Science and Technology, Wuhan 430081, ChinaThe State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China; Hubei Engineering Technology Research Center of Materials and Service Safety, Wuhan University of Science and Technology, Wuhan 430081, ChinaThe State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China; Hubei Engineering Technology Research Center of Materials and Service Safety, Wuhan University of Science and Technology, Wuhan 430081, ChinaThe State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China; Hubei Engineering Technology Research Center of Materials and Service Safety, Wuhan University of Science and Technology, Wuhan 430081, China; College of Materials Science and Engineering, Shenzhen University, Shenzhen 518000, China; Corresponding author.The square wave polarisation technique and mathematical/electrochemical models were combined to investigate pitting corrosion of pipeline steel X100 under cathodic protection potential fluctuations with different duty cycles (δ). Mathematical equations were derived to describe the increased potential of the double-charge layer at the steel/solution interface, which increases density from 1100 mm−2 (δ = 10%) to over 6600 mm−2 (δ = 50%). However, an electrochemical model was developed to present the formation of an amorphous corrosion product layer, which reduces the number of local anodic corrosion areas and decreases pitting density when δ is higher than 50%.http://www.sciencedirect.com/science/article/pii/S2667266923000403Pipeline steel X100Cathodic protectionDuty cyclePitting corrosion |
| spellingShingle | Mingjie Dai Y. Frank Cheng Zhen Wang Feng Huang Qian Hu Jing Liu Understanding pit initiation of pipeline steel X100 under cathodic protection potential fluctuating with various duty cycles Corrosion Communications Pipeline steel X100 Cathodic protection Duty cycle Pitting corrosion |
| title | Understanding pit initiation of pipeline steel X100 under cathodic protection potential fluctuating with various duty cycles |
| title_full | Understanding pit initiation of pipeline steel X100 under cathodic protection potential fluctuating with various duty cycles |
| title_fullStr | Understanding pit initiation of pipeline steel X100 under cathodic protection potential fluctuating with various duty cycles |
| title_full_unstemmed | Understanding pit initiation of pipeline steel X100 under cathodic protection potential fluctuating with various duty cycles |
| title_short | Understanding pit initiation of pipeline steel X100 under cathodic protection potential fluctuating with various duty cycles |
| title_sort | understanding pit initiation of pipeline steel x100 under cathodic protection potential fluctuating with various duty cycles |
| topic | Pipeline steel X100 Cathodic protection Duty cycle Pitting corrosion |
| url | http://www.sciencedirect.com/science/article/pii/S2667266923000403 |
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