Evolution of the Corrosion-inhibiting Efficiency of Novel Hydrazine Derivatives against Corrosion of Stainless Steel 201 in Acidic Medium

摘要

The corrosion inhibition effectiveness of some hydrazine derivatives (HD) as corrosion inhibitors forstainless steel (SS 201) in 1.0 M HCl had confirmed using chemical and electrochemical methods. Thestudies were achieve at various temperatures (25-45 o C). The thermodynamic parameters weredetermined. HD have been found to be more effective corrosion inhibitors at lower temperatures.Adsorption isotherm was determined and was found to follow Langmuir’s adsorption isotherm.Inhibition efficiencies at different HD concentrations were determined using chemical andelectrochemical techniques. Polarization data revealed that these HD act as mixed-kind inhibitors.Morphology of the surface was examined utilizing Fourier transform infrared (FTIR) and atomic forcemicroscopy (AFM). The obtained inhibition efficiency from different techniques were in a highagreement, confirming the validity of the used all techniques for stainless steel corrosion inhydrochloric acid medium.