Optimization of Hydrophobic Coating Production by Pechini Method on Modified Aluminum Surface

IF 0.7 Q4 CHEMISTRY, MULTIDISCIPLINARY

Orbital: The Electronic Journal of Chemistry Pub Date : 2023-04-12 DOI:10.17807/orbital.v15i1.17992

Ariane Aparecida de Lima, Lucas Aparecido Bittencourt, Guilherme José Turcatel Alves, G. Tractz, P. Rodrigues, Cynthia Beatriz Fürstenberger

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Abstract

To fabricate a hydrophobic coating using the sol-gel method (Pechini), an experimental design using the drying time and chemicals ratio as variables was developed. The coating was deposited on an aluminum substrate (AA6061-T6) treated by acid solution or anodization method. The surface wettability was measured using a goniometric instrument. Coatings were fabricated using different numbers of layers, heating rates, and drying temperatures, and their morphologies were observed using visual analysis and scanning electron microscopy. The use of anodization treatment with a furnace ramp of 1 °C min-1, a drying temperature of 220 °C ± 10 °C, and single-layer application, produced a coating free of visible flaws and apparent damage. The coating was obtained with a 15:1 glycerin:citric acid ratio and sample pre-polymerization in the drying oven for 1 hour at 100 °C resulted in the highest contact angle, 62° ± 2°, which meets the ASTM D-7334-08 standard for a hydrophobic surface.

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改性铝表面Pechini法制备疏水涂层的优化研究

为了使用溶胶-凝胶法（Pechini）制备疏水涂层，以干燥时间和化学品比例为变量进行了实验设计。涂层沉积在通过酸溶液或阳极氧化方法处理的铝基板（AA6061-T6）上。使用角度测量仪测量表面润湿性。使用不同层数、加热速率和干燥温度制备涂层，并使用视觉分析和扫描电子显微镜观察其形态。使用1°C min-1的炉坡、220°C±10°C的干燥温度和单层应用进行阳极氧化处理，可产生无可见缺陷和明显损坏的涂层。以15:1的甘油：柠檬酸比例获得涂层，样品在干燥炉中在100°C下预聚合1小时，产生最高接触角62°±2°，符合ASTM D-7334-08疏水表面标准。

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来源期刊

Orbital: The Electronic Journal of Chemistry CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

1.10

自引率

0.00%

发文量

审稿时长

10 weeks

期刊介绍： Orbital: The Electronic Journal of Chemistry is a quarterly scientific journal published by the Institute of Chemistry of the Universidade Federal de Mato Grosso do Sul, Brazil. Original contributions (in English) are welcome, which focus on all areas of Chemistry and their interfaces with Pharmacy, Biology, and Physics. Neither authors nor readers have to pay fees. The journal has an editorial team of scientists drawn from regions throughout Brazil and world, ensuring high standards for the texts published. The following categories are available for contributions: 1. Full papers 2. Reviews 3. Papers on Education 4. History of Chemistry 5. Short communications 6. Technical notes 7. Letters to the Editor The Orbital journal also publishes a number of special issues in addition to the regular ones. The central objectives of Orbital are threefold: (i) to provide the general scientific community (at regional, Brazilian, and worldwide levels) with a formal channel for the communication and dissemination of the Chemistry-related literature output by publishing original papers based on solid research and by reporting contributions which further knowledge in the field; (ii) to provide the community with open, free access to the full content of the journal, and (iii) to constitute a valuable channel for the dissemination of Chemistry-related investigations.