IMR OpenIR
Initial Corrosion Behavior of Carbon Steel and Weathering Steel in Nansha Marine Atmosphere
Liu Yuwei1,2; Zhao Hongtao1; Wang Zhenyao1
Corresponding AuthorWang Zhenyao(zhywang@imr.ac.cn)
2020-09-01
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume56Issue:9Pages:1247-1254
AbstractAlong with the increasing pace of marine resource development and strategic deployment of China, the infrastructure materials and deployed aircraft were facing severe salt fog corrosion during the construction process of the South China Sea. Materials damage in this environment is much more serious than that in other marine atmospheric environment. Owing to its location near the equator and the direct impact of solar radiation, Nansha marine atmosphere is a representative and typical climate with high temperature, high humidity, high salinity and high radiation. However, there has been lack of material corrosion data and relevant fundamental research until now. Carbon steel is usually one of the most widely used infrastructure materials and reference materials, and its corrosion data exposed to Nansha Islands marine atmosphere is much more important. These corrosion data can not only provide important basis for environmental corrosivity category, but also provide reference for indoor accelerated corrosion test. Therefore, in order to obtain useful information on selected construction materials, adopting the appropriate corrosion protection methods, and predicting the life of metallic structures under service, the exposure test was conducted on carbon steel Q235 and weathering steel Q450NQR1 in Nansha Islands for 2 and 5 months. Thickness loss analysis, macroscopic observation, SEM, XRD, optical profiler and tensile tests were conducted to study the initial corrosion behavior on both sides of Q235 and Q450NQR1 in Nansha marine atmosphere. The results showed that the initial corrosion behavior of both steels at this site was more serious than those at most areas, such as Wanning and Xisha Islands, and the corrosion of skyward of both steels was more serious than that of field-ward. The rust layer formed on fieldward was easier to fall off. After exposure for 2 months, the thickness loss of Q235 was the same as that of Q450NQR1, and corrosion products on both sides were mainly composed of gamma-FeOOH, alpha-FeOOH and Fe3O4; while after 5 months' exposure, the thickness loss of Q235 was much larger than that of Q450NQR1, and corrosion products were mainly composed of gamma-FeOOH, alpha-FeOOH, Fe3O4 and beta-FeOOH. The relative composition of beta-FeOOH and gamma-FeOOH was fewer on the field-ward, and the relative composition of Fe3O4 was fewer on the skyward.
KeywordNansha marine atmosphere carbon steel atmospheric corrosion mechanism corrosion product
Funding OrganizationNational Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences
DOI10.11900/0412.1961.2020.00013
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51671197] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA13040502]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000576758600007
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/140842
Collection中国科学院金属研究所
Corresponding AuthorWang Zhenyao
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Liu Yuwei,Zhao Hongtao,Wang Zhenyao. Initial Corrosion Behavior of Carbon Steel and Weathering Steel in Nansha Marine Atmosphere[J]. ACTA METALLURGICA SINICA,2020,56(9):1247-1254.
APA Liu Yuwei,Zhao Hongtao,&Wang Zhenyao.(2020).Initial Corrosion Behavior of Carbon Steel and Weathering Steel in Nansha Marine Atmosphere.ACTA METALLURGICA SINICA,56(9),1247-1254.
MLA Liu Yuwei,et al."Initial Corrosion Behavior of Carbon Steel and Weathering Steel in Nansha Marine Atmosphere".ACTA METALLURGICA SINICA 56.9(2020):1247-1254.
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