Inhibition of carbon steel corrosion in CO2-saturated brine using some newly surfactants based on palm oil: Experimental and theoretical investigations

Synergistic effect of polyethylene glycols and rare earth Ce4+ on the corrosion inhibition of carbon steel in sulfuric acid solution: electrochemical, computational, and surface morphology studies

“…The value of K ads was 9.1 9 10 3 and 14. Values of around -20 kJ mol -1 and below are associated with a physisorption mechanism, whereas values around -40 kJ mol -1 and above are associated with a chemical adsorption mechanism [4,5]. The DG ads value obtained in the present investigation was -32.5 and -33.6 kJ mol -1 for PEG(I) and PEG(II), respectively.…”

“…Concern regarding corrosion of carbon steel by H 2 SO 4 has increased in the oil and gas industry because of recent studies concerning transformation of SO x and H 2 S produced during refining and oil extraction into concentrated H 2 SO 4 [3]. There is general consensus that the most practical method to protect metal deployed in such corrosive environments is addition of corrosion inhibitors [4][5][6]. Recently, use of polymers as corrosion inhibitors has attracted great attention.…”

Experimental and computational investigation on the corrosion inhibition characteristics of mild steel by some novel synthesized imines in hydrochloric acid solutions

“…This behavior confirms a greater increase in the energy barrier of mild steel dissolution process relative ability of a material to resist corrosion. The increased inhibition efficiency with the inhibitor concentration (Table The values of cathodic (β c ) and anodic Tafel slopes (β a ) were found to remain almost unchanged with inhibitor concentration, indicates that the addition of inhibitors to Hydrochloric acid solution do not modify the hydrogen evolution mechanism [7]. On the other hand, the cathodic Tafel slopes (β c ) are also found to be greater than the respective anodic Tafel slopes (β a ).…”

“…These applications usually induce serious corrosive effects on equipment's, tubes and pipelines made of iron and its alloys [5][6][7]. Hydrochloric acid is the most difficult of the common acids to handle from the standpoints of corrosion and materials of constructions.…”

Experimental and Theoretical Studies of the Corrosion Inhibition of 4-amino-2-(4-chlorophenyl)-8-(2, 3-dimethoxyphenyl)-6-oxo-2, 6-dihydropyrimido [2, 1-b][1, 3] thiazine-3,7-dicarbonitrile on Carbon Steel in a 1.0 M HCl Solution

“…The above results indicate that retardation of the samples corrosion processes at cathodic and anodic reaction sites occurred, and this was due to the adsorption of these sites by the inhibitor molecules [30][31][32][33]. On the other hand, cathodic Tafel curves gave rise to parallel Tafel lines, indicating that hydrogen evolution reaction is activation-controlled, that a stronger inhibition effect of the inhibitors does not affect the reduction mechanism, and that their inhibition action is blocking the metal surface [34].…”