Effects of Different Coatings, Primers, and Additives on Corrosion of Steel Rebars
In this research, methods of increasing the corrosion resistance of reinforced concrete were experimentally investigated. The study used silica fume and fly ash at optimized percentages of 10 and 25% by cement weight, polypropylene fibers at a ratio of 2.5% by volume of concrete, and a commercial co...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/15/6/1422 |
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| author | Alireza Afshar Soheil Jahandari Haleh Rasekh Aida Rahmani Mohammad Saberian |
| author_facet | Alireza Afshar Soheil Jahandari Haleh Rasekh Aida Rahmani Mohammad Saberian |
| author_sort | Alireza Afshar |
| collection | DOAJ |
| description | In this research, methods of increasing the corrosion resistance of reinforced concrete were experimentally investigated. The study used silica fume and fly ash at optimized percentages of 10 and 25% by cement weight, polypropylene fibers at a ratio of 2.5% by volume of concrete, and a commercial corrosion inhibitor, 2-dimethylaminoethanol (Ferrogard 901), at 3% by cement weight. The corrosion resistance of three types of reinforcements, mild steel (STt37), AISI 304 stainless steel, and AISI 316 stainless steel, was investigated. The effects of various coatings, including hot-dip galvanizing, alkyd-based primer, zinc-rich epoxy primer, alkyd top coating, polyamide epoxy top coating, polyamide epoxy primer, polyurethane coatings, a double layer of alkyd primer and alkyd top coating, and a double layer of epoxy primer and alkyd top coating, were evaluated on the reinforcement surface. The corrosion rate of the reinforced concrete was determined through results of accelerated corrosion and pullout tests of steel-concrete bond joints and stereographic microscope images. The samples containing pozzolanic materials, the corrosion inhibitor, and a combination of the two showed significant improvement in corrosion resistance by 7.0, 11.4, and 11.9 times, respectively, compared to the control samples. The corrosion rate of mild steel, AISI 304, and AISI 316 decreased by 1.4, 2.4, and 2.9 times, respectively, compared to the control sample; however, the presence of polypropylene fibers reduced the corrosion resistance by 2.4 times compared to the control. |
| first_indexed | 2024-03-11T06:00:09Z |
| format | Article |
| id | doaj.art-5891540d5c284a7f92d6591f7facf25a |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-11T06:00:09Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-5891540d5c284a7f92d6591f7facf25a2023-11-17T13:25:19ZengMDPI AGPolymers2073-43602023-03-01156142210.3390/polym15061422Effects of Different Coatings, Primers, and Additives on Corrosion of Steel RebarsAlireza Afshar0Soheil Jahandari1Haleh Rasekh2Aida Rahmani3Mohammad Saberian4Department of Civil and Environmental Engineering, George Mason University, Fairfax, VA 22030, USACentre for Infrastructure Engineering, Western Sydney University, Penrith, NSW 2751, AustraliaSchool of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, AustraliaCentre for Infrastructure Engineering, Western Sydney University, Penrith, NSW 2751, AustraliaSchool of Engineering, RMIT University, Melbourne, VIC 3000, AustraliaIn this research, methods of increasing the corrosion resistance of reinforced concrete were experimentally investigated. The study used silica fume and fly ash at optimized percentages of 10 and 25% by cement weight, polypropylene fibers at a ratio of 2.5% by volume of concrete, and a commercial corrosion inhibitor, 2-dimethylaminoethanol (Ferrogard 901), at 3% by cement weight. The corrosion resistance of three types of reinforcements, mild steel (STt37), AISI 304 stainless steel, and AISI 316 stainless steel, was investigated. The effects of various coatings, including hot-dip galvanizing, alkyd-based primer, zinc-rich epoxy primer, alkyd top coating, polyamide epoxy top coating, polyamide epoxy primer, polyurethane coatings, a double layer of alkyd primer and alkyd top coating, and a double layer of epoxy primer and alkyd top coating, were evaluated on the reinforcement surface. The corrosion rate of the reinforced concrete was determined through results of accelerated corrosion and pullout tests of steel-concrete bond joints and stereographic microscope images. The samples containing pozzolanic materials, the corrosion inhibitor, and a combination of the two showed significant improvement in corrosion resistance by 7.0, 11.4, and 11.9 times, respectively, compared to the control samples. The corrosion rate of mild steel, AISI 304, and AISI 316 decreased by 1.4, 2.4, and 2.9 times, respectively, compared to the control sample; however, the presence of polypropylene fibers reduced the corrosion resistance by 2.4 times compared to the control.https://www.mdpi.com/2073-4360/15/6/1422accelerated corrosioncoating systemsrebarsinhibitorspozzolanic materialspullout test of steel–concrete bond joints |
| spellingShingle | Alireza Afshar Soheil Jahandari Haleh Rasekh Aida Rahmani Mohammad Saberian Effects of Different Coatings, Primers, and Additives on Corrosion of Steel Rebars Polymers accelerated corrosion coating systems rebars inhibitors pozzolanic materials pullout test of steel–concrete bond joints |
| title | Effects of Different Coatings, Primers, and Additives on Corrosion of Steel Rebars |
| title_full | Effects of Different Coatings, Primers, and Additives on Corrosion of Steel Rebars |
| title_fullStr | Effects of Different Coatings, Primers, and Additives on Corrosion of Steel Rebars |
| title_full_unstemmed | Effects of Different Coatings, Primers, and Additives on Corrosion of Steel Rebars |
| title_short | Effects of Different Coatings, Primers, and Additives on Corrosion of Steel Rebars |
| title_sort | effects of different coatings primers and additives on corrosion of steel rebars |
| topic | accelerated corrosion coating systems rebars inhibitors pozzolanic materials pullout test of steel–concrete bond joints |
| url | https://www.mdpi.com/2073-4360/15/6/1422 |
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