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形状可恢复Fe-17Mn-5Si-5Cr合金在混凝土结构中的耐腐蚀性

Corrosion Resistance of Shape Recoverable Fe-17Mn-5Si-5Cr Alloy in Concrete Structures.

作者信息

Joo Jaehoon, Kang Minjoo, Shin Dongmin, Seo Eunhye, Kim Dohyung, Yeon Yeongmo, Hong Kinam, Lee Wookjin, Lee Junghoon

机构信息

Department of Metallurgical Engineering, Pukyong National University, 45, Yongso-ro, Nam-Gu, Busan 48513, Korea.

Dongnam Regional Division, Korea Institute of Industrial Technology (KITECH), Yangsan 50623, Korea.

出版信息

Materials (Basel). 2020 Dec 4;13(23):5531. doi: 10.3390/ma13235531.

DOI:10.3390/ma13235531
PMID:33291561
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7731367/
Abstract

The shape memory effect of steel (i.e., Fe-Mn-Si alloys) enables the tensile strengthening of concrete against tensile stress and unexpected structural vibrations. For practical application, the corrosion resistance of shape-memorable Fe-based steel should be verified. In this study, the corrosion resistance of an Fe-based (Fe-16Mn-5Si-4Ni-5Cr-0.3C-1Ti) shape memory alloy (FSMA), a promising candidate for concrete reinforcement, was investigated by comparing it with general carbon steel (S400). The corrosion resistance of FSMA and S400 inserted in a cement mortar was evaluated using electrochemical methods. FSMA has a more stable passive oxide layer in aqueous solutions with various pH values. Thus, the corrosion resistance of the FSMA sample was much higher than that of the S400 carbon steel, which has a passivation layer in strongly alkaline solution. This stable oxide layer reduced the sensitivity of the corrosion resistance of FSMA to changes in the pH, compared to S400. Furthermore, owing to the stable passive oxide layer, FSMA exhibited a higher corrosion resistance in concrete and a lower decrease in corrosion resistance because of the neutralization of concrete. Therefore, FSMA is a promising candidate for providing reinforcement and reparability, resulting in stable and durable concrete.

摘要

钢（即铁-锰-硅合金）的形状记忆效应能够增强混凝土抵抗拉应力和意外结构振动的能力。在实际应用中，应验证形状记忆铁基钢的耐腐蚀性。在本研究中，通过将一种有望用于混凝土增强的铁基（Fe-16Mn-5Si-4Ni-5Cr-0.3C-1Ti）形状记忆合金（FSMA）与普通碳钢（S400）进行比较，研究了其耐腐蚀性。采用电化学方法评估了嵌入水泥砂浆中的FSMA和S400的耐腐蚀性。在不同pH值的水溶液中，FSMA具有更稳定的钝化氧化层。因此，FSMA样品的耐腐蚀性远高于在强碱性溶液中具有钝化层的S400碳钢。与S400相比，这种稳定的氧化层降低了FSMA耐腐蚀性对pH值变化的敏感性。此外，由于钝化氧化层稳定，FSMA在混凝土中表现出更高的耐腐蚀性，并且由于混凝土的中和作用，其耐腐蚀性降低幅度较小。因此，FSMA是一种有前途的用于提供增强和可修复性的材料，可使混凝土稳定且耐用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e375/7731367/29751a373c87/materials-13-05531-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e375/7731367/ed2b6c77c445/materials-13-05531-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e375/7731367/2851e7d0f487/materials-13-05531-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e375/7731367/40ffd76d35b1/materials-13-05531-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e375/7731367/d693c9ac454c/materials-13-05531-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e375/7731367/53b18ff5623d/materials-13-05531-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e375/7731367/4906f28f2ea8/materials-13-05531-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e375/7731367/29751a373c87/materials-13-05531-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e375/7731367/ed2b6c77c445/materials-13-05531-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e375/7731367/2851e7d0f487/materials-13-05531-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e375/7731367/40ffd76d35b1/materials-13-05531-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e375/7731367/d693c9ac454c/materials-13-05531-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e375/7731367/53b18ff5623d/materials-13-05531-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e375/7731367/4906f28f2ea8/materials-13-05531-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e375/7731367/29751a373c87/materials-13-05531-g007.jpg

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