Multifunctional Aspects of the Synthesized Pyrazoline Derivatives for AP1 5L X60 Steel Protection Against MIC and Acidization: Electrochemical, In Silico, and SRB Insights

Abstract

The inhibitory impact of low-cost synthesized pyrazoline derivatives named Pz series ( Pz1 and Pz2 ) on the corrosion of API 5L X60 carbon steel in 5 M HCl was inspected to serve as corrosion inhibitors against such a solution for its usage in the oilfield well acidization process. Also, the same compounds were unitized as biocides for sulfate-reducing bacteria (SRBs) to inhibit the microbial-induced corrosion effect. This study was conducted via several electrochemical techniques, namely, electrochemical potentiodynamic polarization (EP) and electrochemical impedance spectroscopy (EIS), in addition to computational density functional theory (DFT). The inhibition efficiency (IE) of Pz series on the corrosion of 5L X60 carbon steel in 5 M HCl was found to increase whenever the Pz series molecule concentration was increased. EP measurements revealed that Pz1 and Pz2 have both cathodic and anodic features (mixed inhibitor) and their corrosion IEs were around 90%. The physicochemical properties of the Pz1 and Pz2 compounds were studied using Langmuir adsorption isotherms, where the equilibrium adsorption data were found to follow it accurately. EIS outputs were found to comply with the values obtained from EP. Scanning electron microscopy was used to examine the topographic anisotropy between the inhibited and uninhibited 5L X60 carbon steel samples to double-check the electrochemical findings. DFT calculations and Monte Carlo simulations were utilized to predict the behavior of inhibitors and to rationalize the experimental results. The serial dilution bioassay technique was used to assess the Pz series as potential biocides to counter the effect of SRBs in compliance with the TM0194-2014-SG standard test method, and the results showed the potency of Pz series in inhibiting such bacterial growth.

Anticorrosion Effect of Ethoxylate Sulfanilamide Compounds on Carbon Steel in 1 M Hydrochloric Acid: Electrochemical and Theoretical Studies

“…Figure 1S2,S3 shows that the open potential values of carbon steel were in the negative direction after adding S2 and S3, which confirms that the damping effect of the compounds S1 and S2 is greater on the anodic reaction than on the cathodic reaction. 22,23 2.2. Potentiodynamic Polarization (PDP).…”

Insights into the Anticorrosion Performance of Solanum lyratum Leaf Extract for Copper in Sulfuric Acid Medium

“…According to the analysis of the Nyquist plot, it is a capacitive arc in the high-frequency region, which can come from not only the charge transfer resistance but also the electric double-layer capacitor. , It can be clearly observed that the capacitive loop radius continuously increases with the increase in SLLE concentration, showing that the corrosion of copper in sulfuric acid solution is due to the electrochemical reaction controlled by the charge transfer step, indicating that the corrosion reaction of Cu in H 2 SO 4 solution at this time is an electrochemical reaction controlled by the charge transfer step. It can also show that the rate of electrochemical reactions of Cu in 0.5 mol·L –1 H 2 SO 4 solution is slowed down and suppressed with SLLE added.…”

Investigating the Inhibitory Properties of Cupressus sempervirens Extract against Copper Corrosion in 0.5 M H2SO4: Combining Quantum (Density Functional Theory Calculation–Monte Carlo Simulation) and Electrochemical-Surface Studies

“…It is worth mentioning that the inhibition performance if inhibitor tends to increase with low η values. This is also reflecting the high reactivity and inhibition performance of the α-pinene moiety. , Another important descriptor is the ability of molecules to donate electrons to the Cu surface (Δ N Cu(111) ). A high and positive value of Δ N demonstrates that the great capacity of investigated ingredients to donate e- to the cooper surface, especially, the α-pinene molecule.…”

“…A high and positive value of Δ N demonstrates that the great capacity of investigated ingredients to donate e- to the cooper surface, especially, the α-pinene molecule. We did not consider the effect of the dipole moments trend μ, on the inhibition performance because there is disagreement on its impact. − …”