Polyhydrazide Incorporated with Thiadiazole Moiety as Novel and Effective Corrosion Inhibitor for C-Steel in Pickling Solutions of HCl and H2SO4

被引：15
作者：
Sayed, Abdelwahed R. [1 ,3 ]
Abd El-lateef, Hany M. [1 ,2 ]
Mohamad, Ahmad Desoky M. [2 ]
机构：
[1] King Faisal Univ, Coll Sci, Dept Chem, Al Hufuf 31982, Al Hassa, Saudi Arabia
[2] Sohag Univ, Fac Sci, Dept Chem, Sohag 82524, Egypt
[3] Beni Suef Univ, Fac Sci, Dept Chem, Bani Suwayf, Egypt
来源：
MACROMOLECULAR RESEARCH | 2018年 / 26卷 / 10期
关键词：
polyhydrazide; corrosion inhibitor; carbon steel; inhibition; SEM; EIS; HYDROCHLORIC-ACID SOLUTION; LOW-CARBON STEEL; MILD-STEEL; SULFURIC-ACID; POLYETHYLENE-GLYCOL; PHENYL PHOSPHONATE; IODIDE-IONS; ALUMINUM; POLYMER; POLYACRYLAMIDE;
D O I：
10.1007/s13233-018-6124-y
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
In this paper polyhydrazide incorporated with thiadiazole moiety (S5) was prepared and its chemical configuration was confirmed by spectroscopic methods (FTIR, H-1 NMR, and C-13 NMR). The inhibitive action of S5 polymer and its monomer 2,5-dihydrazinyl-1,3,4-thiadiazole (M1) on the C-steel corrosion in pickling acids solution was investigated by weight loss, potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) measurements. PDP method exhibited that the investigated polymer is mixed-type corrosion inhibitor in both acids (HCl and H2SO4). The data revealed that S5 compound is a good inhibitor for Csteel in studied acids, and protection efficiency (P%) follows this sequence: H2SO4<HCl. Also, it was found that, the P% of the S5 polymer is higher than that obtained for its monomer (M1). Adsorption of the titled polymer obeyed the isotherm of Langmuir and involves both chemical and physical adsorptions. Scanning electron microscopy (SEM) investigations established the protective layer formation from the studied polymer on the metal substrate and shield it from direct Cl- and/ or SO42- attack.
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收藏
页码：882 / 891
页数：10
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