Development of a Novel Thermally Stable Inhibitor Based on Furfuryl Alcohol for Mild Steel Corrosion in a 15% HCl Medium for Acidizing Application

Abstract

Although corrosion inhibitors are widely used as a practical method for inhibiting metal corrosion in a variety of industries, their efficiency decreases dramatically at high temperatures. We present a thorough experimental and theoretical investigation into the inhibitory power of a novel thermally stable corrosion inhibitor based on furfuryl alcohol (FACI). The opencircuit potential, linear polarization resistance, potentiodynamic polarization, and electrochemical impedance spectroscopy techniques were used for the first time to evaluate FACI inhibition performance at 293, 313, 333, and 353 K. All electrochemical methods clearly indicated that FACI effectively suppressed corrosion of mild steel (MS) in the 15% HCl environment via a mixed-type mechanism at all temperatures investigated. The highest inhibition efficiencies of 95.4 and 90.8 at 333 and 353 K, respectively, were obtained in the solution containing 136 × 10 −5 M FACI. FACI inhibited both the anodic and cathodic corrosion reactions of MS, but its main effect was on the cathodic hydrogen evolutions. The results of the Langmuir adsorption isotherm confirmed that the predominantly chemical adsorption of FACI molecules occurred on the MS surface. The experimental results were also validated using a combined DFT.

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“…The values displayed for Etot show that the adsorption of molecules to the metal surface is thermodynamically favored. Low adsorption EAds, as observed in all compounds is associated with a strong adsorption of the inhibitor molecules on Fe(110) surface [36,37]. Fig.…”

“…Compounds A1-6 and B1-6 were simulated using the Monte Carlo method to assess the adsorption and possible interactions between them and Fe(110) surface along the low-index miller facet [8,22,25]. Fe (110) plane was selected for its good stability and well-packed structure [27]. The molecules and Fe (110) were optimized using the Forcite module as earlier described [8,25].…”

Inhibition Mechanism of Some Vinylalkylimidazolium-Based Polymeric Ionic Liquids against Acid Corrosion of API 5L X60 Steel: Electrochemical and Surface Studies

“…The Rp behavior pattern in the presence of PILs obtained by LPR is shown in Figure . It was found that as the inhibitor concentration ( C INH ) was increased the current density ( i ) vs overpotential (η) slopes diminished, which implies higher Rp and suggests that the inhibition process on the steel surface occurred through the adsorption of PIL molecules. , This effect is also shown in Figure from the PDP behavior with respect to log i and C INH . The decrease of log i with C INH indicates that the PILs worked as CIs, yielding values below 175 ppm of poly­[VIMC4]­[Im], poly­[VIMC2]­[Br], and poly­[VIMC4]­[Br].…”

Synthesis and Corrosion Inhibition Performance of Mannich Bases on Mild Steel in Lactic Acid Media

“…As shown in Table , the anodic and cathodic Tafel slopes (β a and β c ) change with inhibitor concentration, implying that the inhibitor affects both the cathodic and anodic reactions. For both DTZA and DPZA, the deviation in corrosion potential E corr lies below 85 mV, and the corrosion inhibitors can be classified as mixed-type. , As the concentration of DTZA increases from 0.05 to 0.15%, the I corr value of N80 steel in lactic acid decreases from 116.5 to 42.55 μA/cm 2 , the corresponding polarization resistance R p increases from 74.67 to 157.11 Ω, and the inhibition efficiency IE increases from 74 to 90.7%. This finding suggests that both the anodic and cathodic reactions have been suppressed.…”

“…For both DTZA and DPZA, the deviation in corrosion potential E corr lies below 85 mV, and the corrosion inhibitors can be classified as mixed-type. 43,44 As the concentration of DTZA increases from 0.05 to 0.15%, the I corr value of N80 steel in…”