Versatile novel engineered polyamine/CaAl2Si2O8 nanocontainers manifesting anti-corrosion, mechanical, self-healing, chemical and UV immovability for external aliphatic acrylic polyurethane coating applied on steel petroleum and industrial tanks

IF 8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2025-10-25 DOI:10.1016/j.conbuildmat.2025.144148

A.M. Fadl , M.I. Abdou , N.H. Abotaleb , S. El-Sherbiny , M. Samir

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引用次数: 0

Abstract

Recently, the incorporation of nanocomposites in polyurethane coating layers used to protect steel petroleum and industrial tanks has proven to play a vital role in raising their various resistance properties and enhancing their workability. For affirming this motif, amorphous silica nanoparticles (ASNPs, CaAl₂Si₂O₈) were synthesized by thermal fusion/quick quenching/solid phase milling sequential processes and commingled with cycloaliphatic/aromatic polyamine admixture to fabricate APN (AS/PA) nanocontainers acting as a versatile modifier for the external aliphatic acrylic polyurethane (AAPU) coating. XRD examination confirmed the amorphous shape of ASNPs and its quantitative chemical composition was demonstrated using the EDX technique. Measurements using TEM, SEM, and DLS allowed ASNPs to be characterized. Using the weight loss method and the salt spray accelerated corrosion test, the corrosion mitigation behavior of surface-modified APN polyurethane-coated films was compared to unmodified conventional PU. APN/PU-5 coating offered the least corrosion rate (CR) value at 0.00031 mm/y and exhibited the highest protection efficiency (PE) at 99.90 %. SEM and EDX surface morphological studies emphasized that the APN/PU-5-coated layer offered the best corrosion mitigation performance, revealing self-healing behavior. The electrochemical behavior was performed using potentiodynamic polarization (PDP) and electrochemical impedance spectroscopic (EIS) measurements and affirmed the corrosion guard properties of the modified coatings in 5 % NaCl aggressive solution. The chemical resistance was investigated by acid and alkali spot tests to show the effect of incorporating the APN modifier on the chemical and physical degradations of coating layers. The mechanical durability for the various coatings was investigated by abrasion resistance, pull-off and cross-cut adhesions, direct versus indirect impacts, and bend flexibility methodology for demonstrating their workability and firmness. Consequently, UV immovability testing was conducted on the examined PU-coated films utilizing UV irradiation. The obtained results illustrated the superior UV resistance characteristics of the APN/PU-5 coating, in which APN modifier behave as UV absorber material. The presented results affirmed the versatile properties of APN/PU hybrid nanocomposite coating.

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多功能新型工程多胺/CaAl2Si2O8纳米容器，具有防腐、机械、自愈、化学和紫外线不动性，适用于钢制石油和工业储罐的外部脂肪族丙烯酸聚氨酯涂层

近年来，将纳米复合材料加入到钢制石油罐和工业储罐的聚氨酯涂层中，对提高其各种耐蚀性能和提高其可加工性起着至关重要的作用。为了证实这一基序，采用热熔/快淬/固相研磨顺序工艺合成了非晶态二氧化硅纳米粒子（ASNPs, CaAl2Si2O8），并与环脂肪族/芳香族多胺混合物混合制备了APN （AS/PA）纳米容器，作为外脂肪族丙烯酸聚氨酯（AAPU）涂层的通用改性剂。XRD检测证实了ASNPs的非晶形态，并用EDX技术对其化学成分进行了定量分析。使用TEM， SEM和DLS进行测量，可以对ASNPs进行表征。采用失重法和盐雾加速腐蚀试验，比较了表面改性APN聚氨酯包覆膜与未改性常规PU的缓蚀性能。APN/PU-5涂层的腐蚀速率（CR）值最小，为0.00031 mm/y，保护效率（PE）最高，为99.90 %。SEM和EDX表面形貌研究强调，APN/ pu -5涂层具有最佳的缓蚀性能，表现出自修复行为。采用动电位极化（PDP）和电化学阻抗谱（EIS）测试了改性膜在5 % NaCl腐蚀溶液中的电化学行为，并证实了改性膜的防腐性能。通过酸性和碱性斑点试验考察了APN改性剂对涂层化学和物理降解的影响。各种涂层的机械耐久性通过耐磨性、拉脱性和横切附着力、直接与间接影响以及弯曲柔韧性方法来证明其可加工性和坚固性。因此，利用紫外线照射对所检查的pu涂覆膜进行了紫外线不动性测试。结果表明，APN改性剂作为紫外线吸收材料，APN/PU-5涂层具有优异的抗紫外线性能。研究结果证实了APN/PU杂化纳米复合涂层的通用性。

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来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.