Synergistic effect of crevice corrosion and galvanic coupling on 304SS fasteners degradation in chloride environments

IMR OpenIR

	Synergistic effect of crevice corrosion and galvanic coupling on 304SS fasteners degradation in chloride environments
	Daniel, Enobong Felix 1; Wang, Changgang 1; Li, Chao 1; Dong, Junhua 1; Zhang, Dongjiu 3; Zhong, Wenan 3; Zhong, Sheng 3; Udoh, Inime Ime 4; Okafor, Peter Chukwuemeka 5
	2023
发表期刊	NPJ MATERIALS DEGRADATION
ISSN	2397-2106
卷号	7 期号:1
摘要	The synergistic effect of crevice corrosion and galvanic coupling on the degradation of 304 stainless steel fasteners exposed to a chloride environment was investigated using electrochemical and surface analysis techniques. Results obtained revealed that the crevice region of the fastener showed lower corrosion resistance due to decreased surface passivation induced by the crevice geometry and low oxygen conditions, while the exposed region with a higher oxygen supply exhibited improved corrosion resistance. Coupling of the exposed and crevice regions of the fastener demonstrated accelerated corrosion attributable to galvanic effect. The driving force for the galvanic effect on the fastener was linked to three (3) key factors: (I) the potential difference established between the different regions on the fastener surface due to uneven oxygen distribution, (II) the difference in the solution environment, and (III) the difference in surface properties (active-passive surface). Morphological studies showed localised corrosion occurring mainly in the crevice.
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/177289
专题	中国科学院金属研究所
作者单位	1.University of Science & Technology of China, CAS 2.Institute of Metal Research, CAS 3.Xichang Satellite Launch Ctr 4.Shenyang Ligong University 5.University of Calabar
推荐引用方式 GB/T 7714	Daniel, Enobong Felix,Wang, Changgang,Li, Chao,et al. Synergistic effect of crevice corrosion and galvanic coupling on 304SS fasteners degradation in chloride environments[J]. NPJ MATERIALS DEGRADATION,2023,7(1).
APA	Daniel, Enobong Felix.,Wang, Changgang.,Li, Chao.,Dong, Junhua.,Zhang, Dongjiu.,...&Okafor, Peter Chukwuemeka.(2023).Synergistic effect of crevice corrosion and galvanic coupling on 304SS fasteners degradation in chloride environments.NPJ MATERIALS DEGRADATION,7(1).
MLA	Daniel, Enobong Felix,et al."Synergistic effect of crevice corrosion and galvanic coupling on 304SS fasteners degradation in chloride environments".NPJ MATERIALS DEGRADATION 7.1(2023).