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高压氧加速腐蚀试验生成的钢腐蚀层的组成相及微观力学性能

The Constituent Phases and Micromechanical Properties of Steel Corrosion Layers Generated by Hyperbaric-Oxygen Accelerated Corrosion Test.

作者信息

Jiang Baozhen, Doi Kotaro, Tsuchiya Koichi

机构信息

School of Materials, Sun Yat-sen University, Shenzhen 518107, China.

Research Center for Structural Materials, National Institute for Materials Science, Tsukuba 305-0047, Japan.

出版信息

Materials (Basel). 2023 Jun 22;16(13):4521. doi: 10.3390/ma16134521.

DOI:10.3390/ma16134521
PMID:37444836
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10342771/
Abstract

Hyperbaric oxygen-accelerated corrosion testing (HOACT) is a newly developed method to study in the labor the corrosion behavior of steel bars in concrete. This work aimed to intensively investigate the mechanical properties and microstructures of HOACT-generated corrosion products by means of nano-indentation tests, Raman micro-spectrometry, and scanning electron microscopy. The local elastic modulus and nanohardness varied over wide ranges of 6.8-75.2 GPa and 0.38-4.44 GPa, respectively. Goethite, lepidocrocite, maghemite, magnetite, and akageneite phases were identified in the corrosion products. Most regions of the rust layer were composed of a complex and heterogeneous mix of different phases, while some regions were composed of maghemite or akageneite only. The relationship between the micromechanical properties and typical microstructural features is finally discussed at the micro-scale level. It was found that the porosity of corrosion products can significantly influence their micromechanical properties.

摘要

高压氧加速腐蚀试验（HOACT）是一种新开发的在实验室研究混凝土中钢筋腐蚀行为的方法。这项工作旨在通过纳米压痕试验、拉曼显微光谱和扫描电子显微镜深入研究HOACT产生的腐蚀产物的力学性能和微观结构。局部弹性模量和纳米硬度分别在6.8 - 75.2 GPa和0.38 - 4.44 GPa的宽范围内变化。在腐蚀产物中鉴定出针铁矿、纤铁矿、磁赤铁矿、磁铁矿和氯铜矿相。锈层的大部分区域由不同相的复杂异质混合物组成，而一些区域仅由磁赤铁矿或氯铜矿组成。最后在微观尺度上讨论了微观力学性能与典型微观结构特征之间的关系。发现腐蚀产物的孔隙率会显著影响其微观力学性能。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d396/10342771/303084cfbc5e/materials-16-04521-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d396/10342771/62f1468e1277/materials-16-04521-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d396/10342771/bffde1112e59/materials-16-04521-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d396/10342771/3db769f142ae/materials-16-04521-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d396/10342771/ccc9fb8cadfe/materials-16-04521-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d396/10342771/d0c7f35d78c3/materials-16-04521-g005a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d396/10342771/3e965e255b9e/materials-16-04521-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d396/10342771/303084cfbc5e/materials-16-04521-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d396/10342771/62f1468e1277/materials-16-04521-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d396/10342771/bffde1112e59/materials-16-04521-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d396/10342771/3db769f142ae/materials-16-04521-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d396/10342771/ccc9fb8cadfe/materials-16-04521-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d396/10342771/d0c7f35d78c3/materials-16-04521-g005a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d396/10342771/3e965e255b9e/materials-16-04521-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d396/10342771/303084cfbc5e/materials-16-04521-g007.jpg

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本文引用的文献

1
Effects of chloride ions on corrosion of ductile iron and carbon steel in soil environments.氯离子对土壤环境中球墨铸铁和碳钢腐蚀的影响。
Sci Rep. 2017 Jul 31;7(1):6865. doi: 10.1038/s41598-017-07245-1.