Mechanistic insight into the environmental stress-induced formation and evolution of the micro-defects in deteriorating organic coatings

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2025-02-27 DOI:10.1016/j.corsci.2025.112815

Li Zhuoxuan , Dong Xiaomei , Wang Yuhao , Li Qiubo , Yong Xingyue , Wang Shaogang

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引用次数: 0

Abstract

The synergistic effects of corrosion and alternating stresses accelerate the failure of organic coatings during service. However, the influence of alternating stress on coating failure mechanisms remains insufficiently studied. In this study, X-ray diffraction topography (XRT) and scanning electron microscopy (SEM) were employed to analyze the environmental stress-induced formation and evolution of the micro-defects in a deteriorating organic coating. Electrochemical impedance spectroscopy (EIS) was used to investigate how these stress-induced micro-defects affect coating capacitance. The results showed that environmental stresses not only significantly alter the surface morphology of coated specimens but also promote the initiation and growth of both new and pre-existing micro-defects, leading to changes in their distribution. Additionally, applied stresses were found to favor the formation of non-spherical micro-defects more effectively than corrosion stress. Changes in the number and distribution of micro-defects directly influenced coating capacitance, which, in turn, impacted its protective performance. Overall, this study underscores the critical role of environmental stresses in initiating and propagating micro-defects within organic coating protective systems.

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来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.