Influence of sulfonic acid doping during polypyrrole electrodeposition on the corrosion protection for AA2024-T3

IF 23.2 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Advanced Composites and Hybrid Materials Pub Date : 2024-12-17 DOI:10.1007/s42114-024-01139-3

Mao-Chia Lin, Zhen Wei, Ruigang Wang, Xinyu Zhang

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Abstract

The electrodeposition of polypyrrole on AA2024-T3 was prepared by applying a constant potential via three different dopants including sulfuric acid (SA), p-toluenesulfonic acid (pTSA), and 2-naphthalenesulfonic acid (2NS). The polypyrrole coating was characterized by scanning electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FTIR). The anti-corrosion behavior was examined by Tafel curves to find the optimized concentration and deposition time for each dopant. Polypyrrole was successfully electrodeposited on AA2024-T3 with pTSA and 2NS dopants, which exhibited better corrosion protection compared with bare AA2024-T3. In addition, a conventional coating was applied with spray paint considered as a topcoat to further investigate the protection efficiency of the polypyrrole. The 2NS-doped polypyrrole exhibited a good protection efficiency of 99.99%. The results demonstrated that the chemical structure of the dopant influences the corrosion protection where the corrosion potential has positively increased with the extended electrodeposition time. Topcoat with spray paint working as a surface barrier can protect the polypyrrole coating and enlarge the protection time.

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通过三种不同的掺杂剂（包括硫酸（SA）、对甲苯磺酸（pTSA）和 2-萘磺酸（2NS））施加恒定的电位，在 AA2024-T3 上制备了聚吡咯的电沉积。通过扫描电子显微镜（SEM）和傅立叶变换红外光谱（FTIR）对聚吡咯涂层进行了表征。通过塔菲尔曲线检测了抗腐蚀行为，从而找到了每种掺杂剂的最佳浓度和沉积时间。使用 pTSA 和 2NS 掺杂剂在 AA2024-T3 上成功电沉积了聚吡咯，与裸 AA2024-T3 相比，聚吡咯具有更好的防腐蚀性能。此外，为了进一步研究聚吡咯的保护效率，还使用了喷漆作为面涂层。掺杂 2NS 的聚吡咯表现出 99.99% 的良好保护效率。结果表明，掺杂剂的化学结构影响了腐蚀保护，随着电沉积时间的延长，腐蚀电位呈正增长。喷漆表层作为表面屏障，可以保护聚吡咯涂层并延长保护时间。

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来源期刊

Advanced Composites and Hybrid Materials Multiple-

CiteScore

26.00

自引率

21.40%

发文量

185

期刊介绍： Advanced Composites and Hybrid Materials is a leading international journal that promotes interdisciplinary collaboration among materials scientists, engineers, chemists, biologists, and physicists working on composites, including nanocomposites. Our aim is to facilitate rapid scientific communication in this field. The journal publishes high-quality research on various aspects of composite materials, including materials design, surface and interface science/engineering, manufacturing, structure control, property design, device fabrication, and other applications. We also welcome simulation and modeling studies that are relevant to composites. Additionally, papers focusing on the relationship between fillers and the matrix are of particular interest. Our scope includes polymer, metal, and ceramic matrices, with a special emphasis on reviews and meta-analyses related to materials selection. We cover a wide range of topics, including transport properties, strategies for controlling interfaces and composition distribution, bottom-up assembly of nanocomposites, highly porous and high-density composites, electronic structure design, materials synergisms, and thermoelectric materials. Advanced Composites and Hybrid Materials follows a rigorous single-blind peer-review process to ensure the quality and integrity of the published work.