Monitoring corrosion and corrosion control of iron in HCl by non-ionic surfactants of the TRITON-X series – Part III. Immersion time effects and theoretical studies

Effect of Nd3+ Ion Concentration on the Corrosion Resistance of API X70 Steel in Chloride‐Rich Environments

“…It has been suggested that a displacement in the OCP values greater than ±85 mV, with respect to the blank, is typical of anodic or cathodic inhibitors depending on the direction of displacement; otherwise, they are mixed inhibitors [24][25][26]. However, the results of this study show a variation in the OCP values lower than 85 mV; this reaffirms that the Nd 3+ ions act as a mixed inhibitor with a strong predominant cathodic effect as previously established.…”

Experimental and theoretical studies for mild steel corrosion inhibition in 1.0M HCl by three new quinoxalinone derivatives

“…The calculated quantum chemical parameters such as the highest occupied molecular orbital energy (E HOMO ), lowest unoccupied molecular orbital energy (E LUMO ), the energy gap between E HOMO and E LUMO (ΔE), dipole moments (DM), molecular volume (MV), sum of the total negative charge (TNC), global hardness (η), softness (σ), chemical potential (μ), electronegativity (χ), global Electrophilicity (ω) and sum of electronic and zero-point energies (SEZPE) are important and useful tools to compare the corrosion inhibition performances of molecules [59][60][61][62][63][64][65].…”

Silybum marianum extract as a natural source inhibitor for 304 stainless steel corrosion in 1.0 M HCl

“…This noble shift in E corr enhances with increase in S. marianum extract concentration. According to Riggs [33,34], the classification of a compound as an anodic or cathodic type inhibitor is feasible when the OCP displacement is at least 85 mV in relation to that one measured for the blank solution. However from Fig.…”