Abstract
The corrosion inhibition effect of Rabeprazole sulfide (RS) on mild steel in 1 M hydrochloric acid (HCl) was investigated using weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and chronoamperometric measurements. Protection efficiency of RS increases with the concentration and decreases with the rise in temperature. Adsorption of RS on mild steel surface in 1 M HCl follows Langmuir adsorption isotherm. The kinetic and thermodynamic parameters governing the adsorption process were calculated and discussed. The polarization results suggest that RS performed as an excellent mixed-type inhibitor for mild steel corrosion in 1 M HCl.
Highlights
Mild steel is widely used in many industries due to its excel– lent mechanical properties and low cost
We have investigated the corrosion inhibition effect of this compound on mild steel in 0.5 M H2SO4 media in a previous article [18]
The aim of this study is to explore the use of Rabeprazole sulfide as an acid corrosion inhibitor for mild steel surface in hydrochloric acid (HCl) solution using weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and the chronoamperometric techniques
Summary
Mild steel is widely used in many industries due to its excel– lent mechanical properties and low cost. It undergoes corrosion to a greater extent in acidic environment. Acids are employed in several industrial processes such as acid pickling, cleaning, acid descaling, and oil well acidizing. The use of HCl in these processes is more economical, efficient, and trouble-free, compared to other mineral acids [1]. In order to avoid the base metal attack, chemical inhibitors are often used for these processes to control the metal dissolution. The most well-known acid corrosion inhibitors are the heterocyclic compounds containing nitrogen, sulphur, and oxygen atoms [2,3,4,5]
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