Carbonic Anhydrase as a Sustainable Corrosion Inhibitor for Concrete

ACS Applied Engineering Materials Pub Date : 2024-12-30 DOI:10.1021/acsaenm.4c0064310.1021/acsaenm.4c00643

Sara Heidarnezhad, Shuai Wang and Nima Rahbar*,

{"title":"Carbonic Anhydrase as a Sustainable Corrosion Inhibitor for Concrete","authors":"Sara Heidarnezhad, Shuai Wang and Nima Rahbar*, ","doi":"10.1021/acsaenm.4c0064310.1021/acsaenm.4c00643","DOIUrl":null,"url":null,"abstract":"<p >Concrete, the most widely used material globally, accounts for 8% of all CO<sub>2</sub> emissions, with corrosion being a primary factor limiting its lifespan. This study investigates the use of carbonic anhydrase (CA), a bioenzyme, as a cost-effective corrosion inhibitor. Concrete specimens with varying CA dosages─Control, CA-1X, CA-5X, CA-10X, and CA-20X─were made and tested under accelerated corrosion tests. Results show that CA-5X achieved the lowest corrosion rate, reducing rebar corrosion depth to 109 μm─34% lower than the control. Additionally, CA-5X delayed crack initiation by 24 h, demonstrating superior corrosion mitigation. Faraday’s law analysis provided quantitative insights into corrosion kinetics, while thermogravimetric analysis (TGA) and mercury intrusion porosimetry (MIP) revealed mechanisms of corrosion resistance, including crystal precipitation and significantly improved pore structure in the cementitious matrix. These findings highlight CA’s potential to enhance durability and sustainability by extending concrete service life and reducing repair needs, thereby mitigating its environmental impact.</p>","PeriodicalId":55639,"journal":{"name":"ACS Applied Engineering Materials","volume":"3 1","pages":"128–141 128–141"},"PeriodicalIF":0.0000,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Applied Engineering Materials","FirstCategoryId":"1085","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acsaenm.4c00643","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 0

Abstract

Concrete, the most widely used material globally, accounts for 8% of all CO₂ emissions, with corrosion being a primary factor limiting its lifespan. This study investigates the use of carbonic anhydrase (CA), a bioenzyme, as a cost-effective corrosion inhibitor. Concrete specimens with varying CA dosages─Control, CA-1X, CA-5X, CA-10X, and CA-20X─were made and tested under accelerated corrosion tests. Results show that CA-5X achieved the lowest corrosion rate, reducing rebar corrosion depth to 109 μm─34% lower than the control. Additionally, CA-5X delayed crack initiation by 24 h, demonstrating superior corrosion mitigation. Faraday’s law analysis provided quantitative insights into corrosion kinetics, while thermogravimetric analysis (TGA) and mercury intrusion porosimetry (MIP) revealed mechanisms of corrosion resistance, including crystal precipitation and significantly improved pore structure in the cementitious matrix. These findings highlight CA’s potential to enhance durability and sustainability by extending concrete service life and reducing repair needs, thereby mitigating its environmental impact.

Abstract Image

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

ACS Applied Engineering Materials 材料科学-

自引率

0.00%

发文量

期刊介绍： ACS Applied Engineering Materials is an international and interdisciplinary forum devoted to original research covering all aspects of engineered materials complementing the ACS Applied Materials portfolio. Papers that describe theory simulation modeling or machine learning assisted design of materials and that provide new insights into engineering applications are welcomed. The journal also considers experimental research that includes novel methods of preparing characterizing and evaluating new materials designed for timely applications. With its focus on innovative applications ACS Applied Engineering Materials also complements and expands the scope of existing ACS publications that focus on materials science discovery including Biomacromolecules Chemistry of Materials Crystal Growth & Design Industrial & Engineering Chemistry Research Inorganic Chemistry Langmuir and Macromolecules.The scope of ACS Applied Engineering Materials includes high quality research of an applied nature that integrates knowledge in materials science engineering physics mechanics and chemistry.