Experimental investigation on Nano-Al2O3 and hydroxypropyl methyl cellulose (HPMC) modified cement-based coatings for corrosion resistance
文献类型：期刊论文
| 作者 | Zhou, Junhao2; Shang, Huaishuai2; Fan, Liang1; Wang, Xiaolong2 ; Huang, Yue2
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| 刊名 | JOURNAL OF BUILDING ENGINEERING
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| 出版日期 | 2024-10-15 |
| 卷号 | 95页码:25 |
| 关键词 | Coatings Nano-Al 2 O 3 HPMC Corrosion resistance Electro-chemical behaviors |
| DOI | 10.1016/j.jobe.2024.110216 |
| 通讯作者 | Shang, Huaishuai(shanghuaishuai@aliyun.com) |
| 英文摘要 | In this work, cementitious coatings doped with nano-Al2O3 (NA) and hydroxypropyl methyl cellulose (HPMC) were prepared in order to enhance corrosion resistance of steel bar. The electrochemical behaviors and corrosion inhibition properties of coated steel bar and tensioned coated steel bars (subjected to 10 %, 30 % and 50 % yield load) were analyzed in 3.5 wt% NaCl solution for 840 h (35 days). At the end of electrochemical test, coating overall performance was evaluated by visual inspection. In addition, scanning electron microscopy (SEM), transmission electron microscopy (TEM) with energy dispersive spectroscopy (EDS) were used to examine microstructure and elemental composition of coatings. To comprehend the anti-corrosion mechanism of the coatings, X-ray diffraction (XRD) and infrared spectroscopy (FTIR) analysis to characterize products composition and chemical groups. Test results obtained by linear polarization resistance and electrochemical impedance spectroscopy indicated that both tensile and non-tensile coatings resistance show an increasing trend followed by a decrease with increasing NA content. Cementitious coatings incorporating 1 % NA and 0.12 % HPMC by weight of cement exhibited the best corrosion protection. The LPR fluctuates around 3700 Omega cm2, which is about twice as much as a single doped NA coating. Whether subjected to tensile loads or not, OCP values for all coated steel bar were below -0.273 V/SCE, indicating has a 90 % probability of being in activecorrosion. The corrosion resistance of tensioned coated bars decreased as time and increased load level. According to SEM and TEM image, HPMC forms a thin and continuous film on the substrate surface, which acts as a barrier to the penetration of moisture and corrosive agents. Coatings doped with 1 % NA and 0.12 % HPMC formed denser integrated polymer films at the microscopic. FTIR and XRD results showed that coating incorporated NA consumed the cement hydration product Ca(OH)2 to generate more nanofibers filling pores and microcracks. Coatings incorporating HPMC show better resistance to carbonization. |
| WOS关键词 | HIGH-PERFORMANCE CONCRETE ; STEEL ; BEHAVIOR ; ENAMEL ; CARBONATION ; MECHANISM ; BOND ; BAR |
| 资助项目 | National Natural Science Foundation of China[52378245] ; Major Basic Research Projects of Shandong Natural Science Foundation[ZR2022ZD33] ; Qingdao Science and Technology Benefiting the People Demonstration Special Project[23-2-8-cspz-9-nsh] |
| WOS研究方向 | Construction & Building Technology ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001286636600001 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/197686]  |
| 专题 | 海洋研究所_海洋腐蚀与防护研究发展中心 |
| 通讯作者 | Shang, Huaishuai |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Environm Corros & Biofouling, Qingdao 266071, Peoples R China 2.Qingdao Univ Technol, Sch Civil Engn, Qingdao 266033, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, Junhao,Shang, Huaishuai,Fan, Liang,et al. Experimental investigation on Nano-Al2O3 and hydroxypropyl methyl cellulose (HPMC) modified cement-based coatings for corrosion resistance[J]. JOURNAL OF BUILDING ENGINEERING,2024,95:25. |
| APA | Zhou, Junhao,Shang, Huaishuai,Fan, Liang,Wang, Xiaolong,&Huang, Yue.(2024).Experimental investigation on Nano-Al2O3 and hydroxypropyl methyl cellulose (HPMC) modified cement-based coatings for corrosion resistance.JOURNAL OF BUILDING ENGINEERING,95,25. |
| MLA | Zhou, Junhao,et al."Experimental investigation on Nano-Al2O3 and hydroxypropyl methyl cellulose (HPMC) modified cement-based coatings for corrosion resistance".JOURNAL OF BUILDING ENGINEERING 95(2024):25. |
入库方式： OAI收割
来源：海洋研究所
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