Inhibitive action and synergistic performance of 2-aminoethanol and N,Ndiethyl-ethanamine on copper in hydrochloric acid solution
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The corrosion inhibition action of copper alloy in 1 M HCl solution in the presence of 2-
aminoethanol (A) and N,N-diethylethanamine (D) at 298 oK was investigated using
gravimetric and linear polarization method. Surface studies of the copper alloy sample were
observed by the help of high resolution scanning electron microscope equipped with energy
dispersive spectroscopy (SEM/EDS). The evaluations were taken after 48 h interval for 288 h
while the concentration of the inhibitor was varied from 5 to 10% w/v. The result of the
examination shows that 2-aminoethanol (A) and N,N-diethylethanamine (D) has a good
corrosion inhibition effect for copper alloy in 1 M HCl solutions and its efficiency attains
above 96% at 10% w/v concentration. The linear polarization result affirmed that 2-
aminoethanol (A) and N,N-diethylethanamine (D) acts as a mixed type corrosion inhibitor.
Their adsorption on copper alloy has been found to obey Langmuir adsorption isotherm at all
the concentration of inhibitor applied. The outcomes from all approaches are in good
agreement with each other.
Keywords
T Technology (General), TJ Mechanical engineering and machinery