标题：Green synthesis of pyrazolo[3,4-b]pyridine derivatives by ultrasonic technique and their application as corrosion inhibitor for mild steel in acid medium
期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2015
卷号：6
期号：1
页码：168-177
出版社：University of Mohammed Premier Oujda
摘要：A green and convenient method using ultrasonic irradiation for the synthesis of pyrazolo[3,4-b]pyridine [PP] derivatives such as 4-(4-bromophenyl)-3-methyl-6-oxo-4,5,6,7-tetrahydro-2H-pyrazolo[3,4 -b]pyridine-5-carbonitrile (PP-1), 4-(4- chlorophenyl)-3-methyl-6-o xo-4,5,6,7-tetrahydro-2H-pyrazolo[3,4-b]pyridine-5-carbonitrile (PP-2), 3-methyl-6-oxo-4-(3 phenoxyphenyl)-4,5,6,7-tetrahydro -2H-pyrazolo[3,4-b]pyridine-5-carbonitrile (PP-3) has been derived. The inhibition performance of the synthesized compounds on mild steel (MS) in 1M HCl has been investigated using weight loss, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization techniques. The results of electrochemical studies reveal that pyrazolo[3,4-b]pyridine derivatives are mixed type inhibitor and they inhibit corrosion by adsorption mechanism
