Article ID Journal Published Year Pages File Type
1469673 Corrosion Science 2011 9 Pages PDF
Abstract

4-(N,N-diethylamino)benzaldehyde thiosemicarbazone (DEABT) was studied for its corrosion inhibition property on the corrosion of aged 18 Ni 250 grade maraging steel in 0.67 M phosphoric acid at 30–50 °C by potentiodynamic polarization, EIS and weight loss techniques. Inhibition efficiency of DEABT was found to increase with the increase in DEABT concentration and decrease with the increase in temperature. The activation energy Ea and other thermodynamic parameters (ΔGads0, ΔHads0, ΔSads0) have been evaluated and discussed. The adsorption of DEABT on aged maraging steel surface obeys the Langmuir adsorption isotherm model and the inhibitor showed mixed type inhibition behavior.

► DEABT as corrosion inhibitor for maraging steel in phosphoric acid. ► Inhibition efficiency increases with increase in inhibitor concentration. ► Inhibition efficiency decreases with increase in temperature. ► Adsorption obeys Langmuir adsorption isotherm.

Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
Authors
, , ,