Elessawy Noha A, Gouda Marwa H, Elnouby Mohamed, Taha Nahla A, Youssef M Elsayed, Santos Diogo M F
Computer Based Engineering Applications Department, Informatics Research Institute IRI, City of Scientific Research and Technological Applications (SRTA-City), Alexandria 21934, Egypt.
Polymer Materials Research Department, Advanced Technology and New Materials Research Institute, City of Scientific Research and Technological Applications (SRTA-City), Alexandria 21934, Egypt.
Polymers (Basel). 2022 Apr 27;14(9):1791. doi: 10.3390/polym14091791.
In our daily lives and product manufacturing, metal corrosion causes significant economic losses. Numerous polymeric composite coatings have been shown to be resistant to harsh environments, such as those found in marine environments. In this study, a composite of polyvinyl alcohol/polyaniline blend loaded with carboxylated graphene was explored in the search for long-lasting coatings to resist electrochemical deterioration of cast iron in desalination systems of saltwater. Polyvinyl alcohol/polyaniline/carboxylated graphene oxide nanocomposite was spin-coated onto cast iron samples. Electrochemical impedance spectroscopy (EIS) and electrochemical DC corrosion testing with a three-electrode system were used to study corrosion resistance in uncoated and coated cast iron samples. The results exhibit effective corrosion protection properties. The EIS data indicated better capacitance and higher impedance values for coated samples than bare metal, depicting enhanced corrosion resistance against the saline environment. Tafel analysis confirmed a significant decrease in the corrosion rate of the PVA/PANI/GO-COOH coated sample.
在我们的日常生活和产品制造中，金属腐蚀会造成重大经济损失。许多聚合物复合涂层已被证明能够抵抗恶劣环境，比如海洋环境。在本研究中，为了寻找能够抵抗盐水淡化系统中铸铁电化学劣化的长效涂层，对负载羧化石墨烯的聚乙烯醇/聚苯胺共混物复合材料进行了探索。将聚乙烯醇/聚苯胺/羧化氧化石墨烯纳米复合材料旋涂到铸铁样品上。采用电化学阻抗谱（EIS）和三电极系统的电化学直流腐蚀测试来研究未涂层和涂层铸铁样品的耐腐蚀性。结果显示出有效的腐蚀防护性能。EIS数据表明，涂层样品的电容比裸金属更好，阻抗值更高，表明对盐环境的耐腐蚀性增强。塔菲尔分析证实，PVA/PANI/GO-COOH涂层样品的腐蚀速率显著降低。
