Synthesis of New Aromatic Azo-Schiff Compound as Carbon Steel Corrosion Inhibitor in 1 M H2SO4; High Efficiency at Low Concentration

2nd International Scientific Conference (Pure Sciences, Brilliant Creativity and Renewed Building)

Salman, Hamida Edan^1 ; Balakit, Asim Alaa^2 ; Abdulridha, Ali Ahmed^3 ; Makki, Sajjad Q.^1

Chemistry Department, College of Education for Pure Sciences, University of Kerbala, Iraq^1

College of Pharmacy, University of Babylon, Babylon, Iraq^2

Department of Education and Higher Education, Abbasid Holy Shrine, Al-Ameed Educational Group, Iraq^3

关键词: Acidic corrosion;    Inhibition efficiency;    Inhibitor concentration;    Langmuir adsorption isotherms;    Organic inhibitors;    Schiff-base;    Schiff-base derivatives;    Weight loss method;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/571/1/012077/pdf
DOI  :  10.1088/1757-899X/571/1/012077

来源: IOP

【 摘 要 】

Schiff base derivative (AS) namely (4-((E)-(4-hydroxy-3-((E)-(phenylimino) methyl) phenyl)diazenyl)benzonitrile) was synthesized and tested as corrosion inhibitor for the carbon steel alloy in 1M sulphuric acid at different concentration (0.005, 0.01, 0.02, 0.04 and 0.08 mM) over temperature rang (303-333) K. Potentiodynamic polarization, weight loss, atomic force microscopy (AFM) and scanning electron microscopy (SEM) techniques have been used in the study. The results revealed that the inhibition efficiency increases as inhibitor concentration increases and decreases with the increasing the temperature. The maximum inhibition recorded efficiency 98% and 97.5% by potentiodynamic polarization and weight loss methods respectively at 303 K in the presence of 0.08 mM of AS. Ecorr values Proof that AS act as mixed type inhibitor. Adsorption isotherm of AS on the carbon steel surface obeys Langmuir adsorption isotherms model.