Anticorrosion Investigation of New Diazene-Based Schiff Base Derivatives as Safe Corrosion Inhibitors for API X65 Steel Pipelines in Acidic Oilfield Formation Water: Synthesis, Experimental, and Computational Studies

Abstract

The current study examines the evaluation of diazene-based Schiff base derivatives, namely, 4-((E)-(3-((E)-(hexylimino)methyl)-4-hydroxyphenyl)diazenyl)benzonitrile (S1) and 4-((E)-(3-((E)-(dodecylimino) methyl)-4-hydroxyphenyl)diazenyl)benzonitrile (S2). The structure elucidation of prepared the Schiff base compounds was performed by FTIR, 1 H NMR, and 13C NMR. In addition, the corrosion inhibition capacity of these compounds was investigated for API X65 steel pipelines in 1 M HCl utilizing gravimetric and electrochemical methods. By conducting the experimental investigations at various doses, it was possible to assess the inhibition effectiveness and adsorption behavior of S1 and S2. With increasing concentration, both inhibitors became more effective at inhibiting corrosion. S1 and S2 suppressed both cathodic and anodic processes, as shown by the potentiodynamic polarization study. The charge transfer resistance (R ct ) increased when S1 and S2 concentrations increased, according to the electrochemical impedance analysis (EIS) data. According to the Langmuir isotherm model, the adsorption of S1 and S2 inhibitors on carbon steel was discovered based on gravimetric measurements. The results were confirmed by theoretical data in addition to the experimental tests for the presence of S1 and S2 inhibitor films over the API X65 carbon steel surface.

Self-assembly of an amino acid derivative as an anode interface layer for advanced alkaline Al–air batteries

“…32 The relevant electrochemical parameters including corrosion potential ( E corr ), corrosion current density ( i corr ), and anodic and cathodic Tafel slopes ( β a and β c ) were obtained via the Tafel extrapolation method. 33 The inhibition efficiency ( η PDP ) was derived from the following formula: 34,35 where i corr,0 and i corr represent the corrosion current densities without and with the NBLT additive, respectively.…”

Novel high-performance and cost-effective green inhibitor based on fundamental theoretical evaluations combined with electrochemical/surface examinations of Arachis hypogaea shell extract for pipeline steel corrosion in 1 M H2SO4 solution

“…In this study, from the gravimetric test with 4 g/L Arachis hypogaea shell extract, 98.42% efficiency was derived. This efficiency is greater than most of the reported green inhibitors [24][25][26][27]. The process of extracting most inhibitors with efficiency lower than Arachis hypogaea shell extracts are expensive.…”

“…Popoola et al investigated the influence of avocado seed extracts on the corrosion of API X 65 pipeline steel in 1 M H 2 SO 4 solutions and found 88% efficiency with 5 g L −1 inhibitor [24]. Amal A Altalhi showed that diazenebased Schiff base derivatives showed 90.4 and 92.6% efficiency on API stainless steel at 100 ppm concentration [25]. In another effort, Alao et al used 5 g Persea Americana seed extract in 1 M HCl media and achieved 95.65% efficiency [26].…”

Fabrication of Protective Organic Layer Using Schiff-Base Metal Complex Responsible for Excellent Corrosion Performance: Experimental and Theoretical Perspectives

“…Diluted acidic solutions are commonly used for various applications, including metal surface preparation, sanitizing industrial machinery, removing mineral deposits through acidification, and acidizing oil wells, all of which can cause significant corrosion in iron and steel . These tasks come with the disadvantage that the intense acidic exposure dissolves the metal, resulting in defects or potentially inducing permanent structural weakness in essential machine elements . As a result of the substantial financial losses and security risks stemming from corrosion in numerous industrial domains, safeguarding metal structures has garnered significant focus.…”