Corrosion Behavior of E690 Steel in Tropical Marine Atmospheres Based on Electrochemical Noise Technique
In the tropical marine atmospheric environment of Zhanjiang, E690 steel was subjected to 7-, 15-, 30-, 90-, 180-, 270-, and 360-day exposure experiments. Electrochemical noise (EN) technology, combined with the weight loss method, corrosion morphology observation, X-ray diffraction analysis (XRD) an...
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The Electrochemical Society of Japan
2025-02-01
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| Series: | Electrochemistry |
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| Online Access: | https://www.jstage.jst.go.jp/article/electrochemistry/93/2/93_24-00098/_html/-char/en |
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| author | Peichang DENG Junhao ZENG Jiezhen HU Baoyu GENG Junhao DENG Wenjie LAN |
| author_facet | Peichang DENG Junhao ZENG Jiezhen HU Baoyu GENG Junhao DENG Wenjie LAN |
| author_sort | Peichang DENG |
| collection | DOAJ |
| description | In the tropical marine atmospheric environment of Zhanjiang, E690 steel was subjected to 7-, 15-, 30-, 90-, 180-, 270-, and 360-day exposure experiments. Electrochemical noise (EN) technology, combined with the weight loss method, corrosion morphology observation, X-ray diffraction analysis (XRD) and polarization curve testing, was used to study the corrosion behavior of E690 steel in a tropical marine atmospheric environment. The results showed that during the initial exposure period, the voltage and current noise fluctuation amplitudes of the EN electrode were large, the current standard deviation (SI) and white noise level (W) were large, the corrosion current density was high, and the corrosion rate of E690 steel was high, mainly due to the small amount of corrosion products on the surface of the sample. Moreover, the voltage and current noise exhibited a nearly symmetrical distribution on both sides of the average value, accompanied by many transient peaks, indicating uniform corrosion of E690 steel. As the exposure time increased, the amplitude of the voltage and current noise fluctuations decreased, the current standard deviation (SI) and white noise level (W) gradually decreased, the corrosion current density decreased, and the corrosion rate decreased and tended to stabilize. In the later stage of exposure to sunlight, pitting corrosion appeared on the surface of E690 steel, and the voltage noise exhibited high-frequency vibration without obvious transient peak characteristics. The current noise also showed high-frequency vibration, and the number of transient peaks significantly decreased. The corrosion type of E690 steel changed from uniform corrosion to pitting corrosion. |
| format | Article |
| id | doaj-art-d7b8a0888c03480390312eb750445ed2 |
| institution | DOAJ |
| issn | 2186-2451 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | The Electrochemical Society of Japan |
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| series | Electrochemistry |
| spelling | doaj-art-d7b8a0888c03480390312eb750445ed22025-08-20T02:45:54ZengThe Electrochemical Society of JapanElectrochemistry2186-24512025-02-0193202700102700110.5796/electrochemistry.24-00098electrochemistryCorrosion Behavior of E690 Steel in Tropical Marine Atmospheres Based on Electrochemical Noise TechniquePeichang DENG0Junhao ZENG1Jiezhen HU2https://orcid.org/0000-0002-7658-6533Baoyu GENG3Junhao DENG4Wenjie LAN5College of Chemistry and Environment, Guangdong Ocean UniversityCollege of Mechanical Engineering, Guangdong Ocean UniversityCollege of Mechanical Engineering, Guangdong Ocean UniversityCollege of Mechanical Engineering, Guangdong Ocean UniversityCollege of Mechanical Engineering, Guangdong Ocean UniversityCollege of Mechanical Engineering, Guangdong Ocean UniversityIn the tropical marine atmospheric environment of Zhanjiang, E690 steel was subjected to 7-, 15-, 30-, 90-, 180-, 270-, and 360-day exposure experiments. Electrochemical noise (EN) technology, combined with the weight loss method, corrosion morphology observation, X-ray diffraction analysis (XRD) and polarization curve testing, was used to study the corrosion behavior of E690 steel in a tropical marine atmospheric environment. The results showed that during the initial exposure period, the voltage and current noise fluctuation amplitudes of the EN electrode were large, the current standard deviation (SI) and white noise level (W) were large, the corrosion current density was high, and the corrosion rate of E690 steel was high, mainly due to the small amount of corrosion products on the surface of the sample. Moreover, the voltage and current noise exhibited a nearly symmetrical distribution on both sides of the average value, accompanied by many transient peaks, indicating uniform corrosion of E690 steel. As the exposure time increased, the amplitude of the voltage and current noise fluctuations decreased, the current standard deviation (SI) and white noise level (W) gradually decreased, the corrosion current density decreased, and the corrosion rate decreased and tended to stabilize. In the later stage of exposure to sunlight, pitting corrosion appeared on the surface of E690 steel, and the voltage noise exhibited high-frequency vibration without obvious transient peak characteristics. The current noise also showed high-frequency vibration, and the number of transient peaks significantly decreased. The corrosion type of E690 steel changed from uniform corrosion to pitting corrosion.https://www.jstage.jst.go.jp/article/electrochemistry/93/2/93_24-00098/_html/-char/entropical marine atmospheric environmente690 steelelectrochemical noise techniquecorrosionpitting corrosion |
| spellingShingle | Peichang DENG Junhao ZENG Jiezhen HU Baoyu GENG Junhao DENG Wenjie LAN Corrosion Behavior of E690 Steel in Tropical Marine Atmospheres Based on Electrochemical Noise Technique Electrochemistry tropical marine atmospheric environment e690 steel electrochemical noise technique corrosion pitting corrosion |
| title | Corrosion Behavior of E690 Steel in Tropical Marine Atmospheres Based on Electrochemical Noise Technique |
| title_full | Corrosion Behavior of E690 Steel in Tropical Marine Atmospheres Based on Electrochemical Noise Technique |
| title_fullStr | Corrosion Behavior of E690 Steel in Tropical Marine Atmospheres Based on Electrochemical Noise Technique |
| title_full_unstemmed | Corrosion Behavior of E690 Steel in Tropical Marine Atmospheres Based on Electrochemical Noise Technique |
| title_short | Corrosion Behavior of E690 Steel in Tropical Marine Atmospheres Based on Electrochemical Noise Technique |
| title_sort | corrosion behavior of e690 steel in tropical marine atmospheres based on electrochemical noise technique |
| topic | tropical marine atmospheric environment e690 steel electrochemical noise technique corrosion pitting corrosion |
| url | https://www.jstage.jst.go.jp/article/electrochemistry/93/2/93_24-00098/_html/-char/en |
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