Experimental and theoretical approach to exploit the corrosion inhibition activity of 3-formyl chromone derivatives on mild steel in 1 m H2SO4

Abstract

Abstract3-Formyl chromone (3FC) derivatives, viz. 5-methoxy-3FC (5-Me-3FC), 6-hydroxy-3FC (6-OH-3FC), and 7-hydroxy-3FC (7-OH-3FC), were studied for the inhibition of mild steel corrosion in 1 m H2SO4 at different temperatures and concentrations. The inhibition was studied using mass loss method, polarization technique, electrochemical impedance spectroscopy (EIS), scanning electron microscopy, and quantum chemical calculations. The results from mass loss, potentiodynamic polarization, and EIS showed that inhibition efficiency (IE) increased with gradual increments in concentration of 3FC derivatives. The polarization study revealed that these compounds act as mixed-type inhibitors and Langmuir adsorption isotherm is fitted well for adsorption behavior. The order of IE provided by all the three compounds is 7-OH-3FC≈6-OH-3FC>5-Me-3FC and lies in the range of 85%–95%. A proposed inhibition mechanism has been further described, including the support from all the experimental and theoretical techniques.

New Electrospun Polystyrene/Al2O3 Nanocomposite Superhydrophobic Coatings; Synthesis, Characterization, and Application

“…The capacitances are substituted by constant phase elements (C dl1 and C dl2 ) to give a more precise fit to the experimental outcomes. The exponent (0 ≤ n ≤ 1) represents deviation from an ideal dielectric behavior; if n = 0, it shows an ideal resistor, and if n = 1, it acts as an ideal capacitor [57][58][59][60][61][62][63][64]. It is noticed that the R po and R ct significantly increase as the WCA increases.…”

Exploring the Capability of Synthesized PVP-Oxime for Corrosion Inhibition of a Mild Steel Surface in a 1 M H2SO4 Solution

“…At various PVPO concentrations, RCT values increased from 62.53 Ω cm 2 to 119.20 Ω cm 2 , whereas Cdl values get decreased from 159 µFcm -2 to 83 µFcm -2 , going from 200 ppm to 1000 ppm, which may be due to the increase in the thickness of the double layer (Mansfeld et al [27]) and/or to the decrease in the dielectric constant. Consequently, the rate of the metal dissolution lowered down [28][29]. Fig.…”

Comprehensive Investigation of the Adsorption, Corrosion Inhibitory Properties, and Quantum Calculations for 2-(2,4,5-Trimethoxybenzylidene) Hydrazine Carbothioamide in Mitigating Corrosion of XC38 Carbon Steel under HCl Environment

“…Carbon steel finds widespread application in high-tech industries owing to its commendable mechanical and physical properties . However, its use in aggressive environments leads to corrosion, posing a significant challenge across various industries .…”

“…Carbon steel finds widespread application in high-tech industries owing to its commendable mechanical and physical properties. 1 However, its use in aggressive environments leads to corrosion, posing a significant challenge across various industries. 2 The economic implications of its usage are profound, given that steel-based infrastructures are the backbone of modern economies.…”