Inhibition Effects on the Corrosion of Mild Steel in 1 M HCl by 1,1'-(2,2'-(2,2'-oxybis(ethane-2,1-diyl)bis(sulfanediyl)) bis(ethane-2,1-diyl))diazepan-2-one

Abstract

The inhibition of the corrosion of Mild Steel (MS) in 1 M HCl solution by a new synthesised organic compound, namely 1,1'-(2,2'-(2,2'-oxybis(ethane-2,1-diyl)bis (sulfanediyl))bis(ethane-2,1-diyl))diazepan-2-one, has been studied by weight loss measurements, electrochemical polarisation and electrochemical impedance spectroscopy (EIS). The experimental results have showed that this organic compound revealed a good corrosion inhibition and the inhibition efficiency is increased with the inhibitor concentration to reach 97% at 1 mM. Potentiodynamic polarisation suggested that it is a mixed type of inhibitor. EIS measurements show an increase of the polarisation resistance with the inhibitor concentration and the electrical equivalent circuit is determined. The inhibitor adsorption process on (MS) surfaces obeys the Langmuir adsorption isotherm and the adsorption isotherm parameters (K ads , ∆G ads , ∆H ads and ∆S ads) were determined. The temperature effect on the corrosion behaviour of (MS) in 1 M HCl without and with inhibitor at different concentration was studied in the temperature range from 308 to 353 K and the kinetic parameters activation such as E a , ∆H a and ∆S a were evaluated.

Evaluation of Grewa Venusta (Wild Jute Tree) Extract as Corrosion Inhibitor for Mild Steel in Acidic Environment

“…From Table 8, the maximum displacement was 46 mV, which indicates that GV acts as a mixed-type inhibitor at 30 o C. It also shows that the effect of the inhibitor on the cathodic reaction is more observable than on the anodic reaction, and that the inhibition efficiency increased from 75.12% to 93.34% with the increment of GV concentration. Thus, this inhibitor acts as a mixed type inhibitor, and this agrees with the works of [19,21].…”

Synergistic inhibition of aluminium corrosion in H2SO4 solution by polypropylene glycol in the presence of iodide ions

“…This indicates the ability of the additives (PPG and PPG + KI) to affect the kinetics of the anodic and cathodic processes. Khadiri et al (2014) have given similar submission. Nevertheless, as the β a value is larger than β c value in all the studied systems, we submit that the inhibitors, although being under mixed control process, have profound effect on the anodic reactions than cathodic half reactions.…”

A novel l-histidine based ionic liquid (LHIL) as an efficient corrosion inhibitor for mild steel

“…Usually, the HF capacitive loop is owing to the double layer properties, and the LF inductive loop is associated with the relaxation process of aggressive ions at the steel surface. 4,46 The addition of L-histidine into HCl solution slightly increases the capacitive loop, indicating the limited corrosion inhibitive function of pure L-histidine for mild steel in this conditions. Interestingly, an obvious enlarge in the diameter of high-frequency loop exhibits with introducing synthesized LHIL inhibitors (Fig.…”

“…1,2 However, the metallic structures are highly damaged by corrosive acids during the cleaning process. [3][4][5] The usage of corrosion inhibitors is a practical way to inhibit the corrosion damage owing to its convenience, high efficiency, and low cost properties. [6][7][8][9][10] Organic substances with heteroatoms (like nitrogen, oxygen, phosphorus and so on), multiple bonds, and polar groups have been extensively studied as inhibitors to protect metal from degradation.…”