Influence of fine-recycled concrete aggregate derived SiO2 composite on corrosion protection and anti-wear characteristics of zinc and zinc phosphate coatings

IF 5.9 3区工程技术 Q1 CHEMISTRY, MULTIDISCIPLINARY

Journal of Industrial and Engineering Chemistry Pub Date : 2025-05-10 DOI:10.1016/j.jiec.2025.05.009

Liju Elias, C.V. Geethanjali, B.I. Bijimol, Anaswara Anil, M.A. Shafna, S.M.A. Shibli

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Abstract

The study explores a different strategy to develop SiO₂ composite through the processing of fine-recycled concrete aggregate (f-RCA derived SiO₂ composite) to utilise as an effective additive in hot-dip zinc and zinc-phosphate coatings. The integration of f-RCA derived SiO₂ composite into the Zn and Zn-phosphate coatings results in their structural and morphological reformation, and leads to the formation of coatings with topographical features favorable to offer resistance against corrosion and wear/friction. The overall comparison of protective characteristics of the coatings confirm ‘Zn-phosphate/f-RCA derived SiO₂ composite coating’ as the best with superior corrosion resistance (CR = 0.94 ± 0.02 × 10⁻² mmpy), wear resistance (low specific wear rate of: 3.55 × 10⁻⁵ mm³/Nm), and friction resistance (low coefficient of friction of: 0.39). The attractive characteristics of composite coating confirm the use of f-RCA derived SiO₂ composite as the best choice of additive in hot-dip Zn and Zn-phosphate coatings to realize effective structural/morphological reformation favorable to achieve better protection against corrosion and wear, in comparison with the use of pure SiO₂ as additive. Therefore, the approach of developing SiO₂ composite explores in this study may pave new path for the effective utilisation of f-RCA and widen the scope for concrete waste recycling.

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细再生混凝土骨料衍生SiO2复合材料对锌、磷酸锌涂料防腐抗磨性能的影响

该研究探索了一种不同的策略，通过处理细再生混凝土骨料（f-RCA衍生SiO2复合材料）来开发SiO2复合材料，将其用作热浸锌和磷酸锌涂料的有效添加剂。将f-RCA衍生的SiO2复合材料整合到锌和磷酸锌涂层中，导致其结构和形态发生改变，并形成具有有利于抗腐蚀和耐磨/摩擦的地形特征的涂层。通过对涂层防护性能的综合比较，发现磷酸锌/f-RCA衍生SiO2复合涂层具有较好的耐蚀性（CR = 0.94±0.02 × 10−2 mmmpy）、耐磨性（低比磨损率：3.55 × 10−5 mm3/Nm）和耐摩擦性（低摩擦系数：0.39）。复合涂层的优异特性证实了使用f-RCA衍生SiO2复合材料作为热浸锌和磷酸锌涂层添加剂的最佳选择，与使用纯SiO2作为添加剂相比，可以实现有效的结构/形态改造，有利于实现更好的抗腐蚀和磨损保护。因此，本研究探索的二氧化硅复合材料的开发方法可能为f-RCA的有效利用开辟新的道路，拓宽混凝土废料回收利用的范围。

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来源期刊

Journal of Industrial and Engineering Chemistry 工程技术-工程：化工

CiteScore

10.40

自引率

6.60%

发文量

639

审稿时长

29 days

期刊介绍： Journal of Industrial and Engineering Chemistry is published monthly in English by the Korean Society of Industrial and Engineering Chemistry. JIEC brings together multidisciplinary interests in one journal and is to disseminate information on all aspects of research and development in industrial and engineering chemistry. Contributions in the form of research articles, short communications, notes and reviews are considered for publication. The editors welcome original contributions that have not been and are not to be published elsewhere. Instruction to authors and a manuscript submissions form are printed at the end of each issue. Bulk reprints of individual articles can be ordered. This publication is partially supported by Korea Research Foundation and the Korean Federation of Science and Technology Societies.