Mohamed Adel M A, Hasan Hosam, Seleman Mohamed M El-Sayed, Ahmed Essam, Saleh Sayed M, El-Maghraby Rehab M
Department of Metallurgical and Materials Engineering, Faculty of Petroleum and Mining Engineering, Suez University, Suez 43512, Egypt.
Department of Chemistry, College of Science, Qassim University, Buraidah 51452, Saudi Arabia.
Materials (Basel). 2021 Oct 24;14(21):6358. doi: 10.3390/ma14216358.
Because of their great water repellency, Superhydrophobic coatings have a major impact on a variety of industrial applications. The current study's key originality is the development of low-cost, stable, superhydrophobic, and corrosion-resistant composite coatings. In the present work, polyvinylidene fluoride (PVDF)/AlO composite coatings were produced using the spray technique to investigate the wettability and corrosion behavior of the coated materials for industrial and civil applications. PVDF was mixed with various concentrations of AlO nanoparticles, and the mixture was sprayed onto steel, aluminum, and glass substrates. The wettability and morphology of the coated surfaces were investigated using the sessile droplet method and scanning electron microscopy, respectively. The corrosion resistance of bare substrates was compared to that of those coated with PVDF alone and those coated with PVDF/AlO nanoparticles using Tafel polarization techniques. The force of adhesion between the coat and the substrates was measured in pounds per square inch. A nanoindentation test was also used to measure the hardness of the coating layer. The PVDF/AlO coated steel showed a significantly higher water contact angle and lower contact angle hysteresis, reaching 157 ± 2° and 7 ± 1°, respectively, compared to the coated aluminum and glass substrates. Corrosion test results showed that the superhydrophobic PVDF/AlO coatings had a much higher corrosion protection efficiency for steel and aluminum than that of the PVDF ones. The PVDF/AlO coated substrates showed moderate but still acceptable adhesion between the coating layer and the substrates. Moreover, the PVDF/AlO coatings had much better mechanical properties than the PVDF only coatings. Such type of coating could be a promising candidate for possible industrial and civil applications.
由于其出色的疏水性，超疏水涂层对各种工业应用产生了重大影响。当前研究的关键创新点在于开发低成本、稳定、超疏水且耐腐蚀的复合涂层。在本工作中，采用喷涂技术制备了聚偏氟乙烯（PVDF）/AlO复合涂层，以研究其在工业和民用领域涂层材料的润湿性和腐蚀行为。将PVDF与不同浓度的AlO纳米颗粒混合，然后将混合物喷涂到钢、铝和玻璃基板上。分别使用静置液滴法和扫描电子显微镜研究了涂层表面的润湿性和形貌。使用塔菲尔极化技术比较了裸基板与仅涂覆PVDF以及涂覆PVDF/AlO纳米颗粒的基板的耐腐蚀性。以每平方英寸磅数为单位测量涂层与基板之间的附着力。还使用纳米压痕测试来测量涂层的硬度。与涂覆的铝和玻璃基板相比，PVDF/AlO涂覆的钢显示出明显更高的水接触角和更低的接触角滞后，分别达到157±2°和7±1°。腐蚀测试结果表明，超疏水的PVDF/AlO涂层对钢和铝的腐蚀防护效率比PVDF涂层高得多。PVDF/AlO涂覆的基板在涂层与基板之间表现出适度但仍可接受的附着力。此外，PVDF/AlO涂层的机械性能比仅PVDF涂层要好得多。这种类型的涂层可能是工业和民用应用的有前途的候选材料。
