Basha Shaik Inayath, Aziz Md Abdul, Maslehuddin M, Ahmad Shamsad
Department of Civil and Environmental Engineering, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia.
Interdisciplinary Research Center for Hydrogen and Energy Storage, King Fahd University of Petroleum and Minerals, KFUPM Box 5040, Dhahran, 31261, Saudi Arabia.
Chem Asian J. 2021 Dec 1;16(23):3914-3930. doi: 10.1002/asia.202100900. Epub 2021 Oct 5.
Jute stick, one of the most commonly and abundantly available agricultural waste product, was converted to a value-added submicron/nano jute carbon by using pyrolysis and high-energy ball milling techniques. The submicron/nano jute carbon was characterized using FE-SEM, TEM, EDS, XRD, XPS and Raman spectroscopy. The anticorrosive performance of the submicron/nano jute carbon was investigated through electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PDP) and salt spray techniques, on mild steel plates coated with a mixture of epoxy resin and the submicron/nano jute carbon. The electrochemical impedance of the steel coated with the composite coating was two orders of magnitudes higher than that of the specimen coated with neat epoxy. Consequently, the corrosion rate of specimens coated with composite coating was 13-20 times higher than that of steel coated with neat epoxy coating. The salt spray results also indicate an improvement in the corrosion resistance performance of the composite coating compared to the neat epoxy. The uniform distribution of the submicron/nano jute carbon particles in the epoxy resin improved the denseness of the composite coating by acting as a barrier against the diffusion of chloride, moisture, and oxygen, thus, improving the corrosion resistance of the developed coating.
黄麻杆是最常见且产量丰富的农业废弃物之一，通过热解和高能球磨技术将其转化为具有附加值的亚微米/纳米级黄麻碳。利用场发射扫描电子显微镜（FE-SEM）、透射电子显微镜（TEM）、能谱仪（EDS）、X射线衍射仪（XRD）、X射线光电子能谱仪（XPS）和拉曼光谱对亚微米/纳米级黄麻碳进行了表征。通过电化学阻抗谱（EIS）、动电位极化（PDP）和盐雾试验技术，研究了在涂覆有环氧树脂和亚微米/纳米级黄麻碳混合物的低碳钢板上，亚微米/纳米级黄麻碳的防腐性能。涂覆复合涂层的钢材的电化学阻抗比涂覆纯环氧树脂的试样高两个数量级。因此，涂覆复合涂层的试样的腐蚀速率比涂覆纯环氧涂层的钢材高13至20倍。盐雾试验结果也表明，与纯环氧树脂相比，复合涂层的耐腐蚀性能有所提高。亚微米/纳米级黄麻碳颗粒在环氧树脂中的均匀分布通过作为氯离子、水分和氧气扩散的屏障，提高了复合涂层的致密性，从而提高了所制备涂层的耐腐蚀性。
