Understanding the mechanism of shrinkage defects on corrosion kinetics of ductile iron

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

Corrosion Science Pub Date : 2025-07-08 DOI:10.1016/j.corsci.2025.113168

Tianqi Chen , Fansong Wu , Can Li , Xuequn Cheng , Xiaogang Li , Yongfeng Chen , Chao Liu

引用次数: 0

Abstract

The mechanism of shrinkage defects on corrosion kinetics of ductile iron is investigated. Shrinkage defects increase the corrosion current density from 11.14 μA/cm² to 16.14 μA/cm² at 303 K and decrease the polarization resistance across different temperatures. The corrosion products surrounding the defects exhibit a loose structure with microcracks. A critical temperature of 308 K was identified between defect-driven corrosion and thermally-driven corrosion. A complex cooperative competition relationship between temperature and defects is revealed. Shrinkage defects remarkably accelerate the corrosion kinetics process by lowering the activation energy and modifying the transformation of corrosion products.

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球墨铸铁收缩缺陷腐蚀动力学机理的研究

研究了收缩缺陷对球墨铸铁腐蚀动力学的影响机理。在303 K下，收缩缺陷使腐蚀电流密度从11.14 μA/cm²提高到16.14 μA/cm²，并降低了不同温度下的极化电阻。缺陷周围的腐蚀产物结构松散，存在微裂纹。缺陷驱动腐蚀与热驱动腐蚀的临界温度为308 K。揭示了温度与缺陷之间复杂的合作竞争关系。收缩缺陷通过降低活化能和改变腐蚀产物的转变，显著加快了腐蚀动力学过程。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.