文献类型：期刊文献

英文题名：Corrosion Behavior of E690 Steel in Tropical Marine Atmospheres Based on Electrochemical Noise Technique

作者：Deng, Peichang[1,2];Zeng, Junhao[3];Hu, Jiezhen[3,4];Geng, Baoyu[3];Deng, Junhao[3];Lan, Wenjie[3]

机构：[1]Guangdong Ocean Univ, Coll Chem & Environm, 1 Haida Rd, Zhanjiang 524088, Guangdong, Peoples R China;[2]Zhanjiang Key Lab Corros & Protect Ocean Engn & Eq, 1 Haida Rd, Zhanjiang 524088, Guangdong, Peoples R China;[3]Guangdong Ocean Univ, Coll Mech Engn, 1 Haida Rd, Zhanjiang 524088, Guangdong, Peoples R China;[4]Guangdong Prov Ocean Equipment & Mfg Engn Technol, 1 Haida Rd, Zhanjiang 524088, Guangdong, Peoples R China

年份：2025

卷号：93

期号：2

外文期刊名：ELECTROCHEMISTRY

收录：SCI-EXPANDED(收录号：WOS:001436006500012)、、EI(收录号：20250617821382)、Scopus(收录号：2-s2.0-85216904012)、WOS

基金：the Natural Science Foundation of China: 51801033 the Natural Science Foundation of Guangdong Province: No. 2021A1515012129 the Science & Technology Development Fundation of Zhanjiang: 2022A01029

语种：英文

外文关键词：Tropical Marine Atmospheric Environment; E690 Steel; Electrochemical Noise Technique; Corrosion; Pitting Corrosion

外文摘要：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. (c) The Author(s) 2024. Published by ECSJ. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium provided the original work is properly cited. [DOI: 10.5796/electrochemistry.24-00098].