Petroleum quaternary ammonium surfactants mixture synthesized from light naphtha as corrosion inhibitors for carbon steel in 1 m HCl

Abstract

A quaternary ammonium cationic surfactants mixture was synthesized from light naphtha, petroleum fraction. The mixture was analyzed by Fourier transform infrared spectroscopy and UV/Visible spectroscopy and was evaluated as a corrosion inhibitor for carbon steel in 1 m HCl, by gravimetry, potentiodynamic polarization and electrochemical impedance spectroscopy. The results showed that inhibiting efficiency increased with inhibitor concentration and temperature, and was independent of pH (in the range of 0–4) and immersion time; its optimal value was up to 84% for 560 mg/l at 25°C. Experimental data showed that the cationic surfactants mixture acts as a mixed (anodic and cathodic) inhibitor and conformed to the Langmuir adsorption isotherm. Scanning electron microscopy images revealed the inhibiting capacity of the mixture against carbon steel acid corrosion.

Synthesis and evaluation of novel series of Schiff base cationic surfactants as corrosion inhibitors for carbon steel in acidic/chloride media: experimental and theoretical investigations

“…They found that, in the presence of 200 ppm of inhibitors the inhibition efficiency ranged from 69.5% to 96.64% and from 94.77 to 98.33 in 2 N H 2 SO 4 and 2 N HCl solutions, respectively. Hamitouche et al 54 also investigated the inhibition performance of some quaternary ammonium surfactants on carbon steel in 1.0 M HCl containing 720 ppm of inhibitors using the potentiodynamic polarization measurements. They showed that, the inhibition efficiency of these inhibitors was around 85%.…”

Novel Schiff base amino acid as corrosion inhibitors for carbon steel in CO2-saturated 3.5% NaCl solution: experimental and computational study

“…Langmuir adsorption isotherms were found to fit well with the experimental data. The adsorption isotherm relationship of Langmuir is represented by the following equation (Bastidas, Pinilla, Cano, Polo, & Miguel, 2003;Hamitouche, Khelifa, Kouache, & Moulay, 2013):…”

Novel Imine-Tethering Cationic Surfactants: Synthesis, Surface Activity, and Investigation of the Corrosion Mitigation Impact on Carbon Steel in Acidic Chloride Medium via Various Techniques

“…The rise in the IE with the increasing surfactant concentration designates that more inhibitor species are adsorbed on the metal interface, leading to the development of a defensive layer at the steel-electrolyte interface [42]. As shown in Table S2, the inhibition powers of our synthesized imine surfactants (~95) are close to or slightly higher than that of the previous synthetic Schiff base compounds (~94) [34,[43][44][45]. Thus, in spite of the yield products' accounts, the use of synthesized compounds, such as our synthesized cationic surfactants, for the protection of the metal surfaces in the corrosive solutions containing chloride produces more yield than the previous synthetic compounds containing the hydroxyl group [44].…”