AISI 304不锈钢增强材料在暴露于MgSO₄的SCBA-SF三元生态混凝土中的腐蚀行为

Corrosion Behavior of AISI 304 Stainless Steel Reinforcements in SCBA-SF Ternary Ecological Concrete Exposed to MgSO.

作者信息

Ariza-Figueroa Hilda A, Bosch Juan, Baltazar-Zamora Miguel Angel, Croche René, Santiago-Hurtado Griselda, Landa-Ruiz Laura, Mendoza-Rangel José M, Bastidas José M, Almeraya-Calderón Facundo, Bastidas David M

机构信息

Facultad de Ingeniería Mecánica y Eléctrica (FIME), Doctorado en Ingeniería, Universidad Veracruzana, Xalapa 91000, Veracruz, Mexico.

Department of Chemical, Biomolecular, and Corrosion Engineering, National Center for Education and Research on Corrosion and Materials Performance (NCERCAMP-UA), The University of Akron, 302 E Buchtel Ave, Akron, OH 44325-3906, USA.

出版信息

Materials (Basel). 2020 May 24;13(10):2412. doi: 10.3390/ma13102412.

DOI:10.3390/ma13102412

PMID:32456331

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7288276/

Abstract

In this study, ternary ecological concrete (TEC) mixtures were produced with partial substitution of the ordinary Portland cement (OPC) by 10%, 20%, and 30% of sugar cane bagasse ash (SCBA) and silica fume (SF); a control mixture (100% OPC) was prepared according to ACI 211.1 standard. The studied TEC specimens were reinforced with AISI 304 stainless steel and AISI 1018 carbon steel rebars. TEC reinforced specimens were immersed in two different electrolytes, a control (DI-water) and 3.5 wt.% MgSO solution, for 180 days. The electrochemical corrosion was monitored by corrosion potential () according to ASTM C-876-15 standard, and the linear polarization resistance (LPR) technique using ASTM G59 standard. The and current density results show that AISI 304 stainless steel rebars have a high corrosion resistance, with values below 0.1 µA/cm, which is interpreted as a level of negligible corrosion. The best corrosion performance was found for the TEC mixture made with a 20% addition of blend of sugar cane bagasse ash-silica fume (SCBA-SF) to the OPC.

摘要

在本研究中，通过用10%、20%和30%的甘蔗渣灰（SCBA）和硅灰（SF）部分替代普通硅酸盐水泥（OPC）来制备三元生态混凝土（TEC）混合物；根据美国混凝土学会（ACI）211.1标准制备了一种对照混合物（100%OPC）。所研究的TEC试件用AISI 304不锈钢和AISI 1018碳钢钢筋进行增强。将TEC增强试件浸泡在两种不同的电解质中，一种是对照物（去离子水），另一种是3.5 wt.%的MgSO溶液，浸泡180天。根据ASTM C - 876 - 15标准通过腐蚀电位（）监测电化学腐蚀，并使用ASTM G59标准采用线性极化电阻（LPR）技术。腐蚀电位和电流密度结果表明，AISI 304不锈钢钢筋具有高耐腐蚀性，其值低于0.1 µA/cm，这被解释为可忽略不计的腐蚀水平。对于在OPC中添加20%甘蔗渣灰 - 硅灰（SCBA - SF）混合物制成的TEC混合物，发现其具有最佳的腐蚀性能。