New eco-friendly cationic surfactants: Synthesis, characterization and applicability as corrosion inhibitors for carbon steel in 1N HCl

Anticancer cytotoxicity assessment of cationic surfactants metal complexes

“…The chemical structures of the parent cationic surfactants (VSBO VSBD VSBH) were described in details in our previous work [9].The chemical structures of the synthesized metal complexes were confirmed using FTIR spectra: 1639 cm …”

“…The synthesis of the cationic surfactants used in this study was briefly described in our recent publication [9]. The metal complexes were synthesized by heating 0.1 mole of transition metal salts (CoCl 2 .6H 2 O, CuCl 2 , NiCl 2 , Y(NO 3 ) 3 .6H 2 O) and 0.2 mole of the different cationic surfactants under reflux condition in 150 mL of ethanol for 12 h. The reaction mixture was then allowed to cool and the precipitate was filtered off.…”

Performance of nonionic surfactants derived from tannic acid in preventing the acidic dissolution of carbon steel

“…The obtained inhibition efficiencies of the tested inhibitors are ranged between 87.7-90.6% at the lowest inhibitors concentration (50 ppm by weight) and ranged between 94.4-96.4% at the highest inhibitors concentration (400 ppm by weight). Comparing our values in Table 1 by the values obtained for the nonionic derivatives vanillin as environmentally friendly corrosion inhibitors (in our previous study) (Negm et al, 2011) indicates the good performance of the tannic acid nonionic derivatives as corrosion inhibitors. The adsorption of the tested inhibitors on the metal surface increases by the presence of -electrons of aromatic ring and lone pair of electrons of hetero-atoms (N, O, S, and P) (Quraishi et al,1997).…”

“…(1) (6) The role of the corrosion inhibitors is to decrease the dissolution of the metal in the acid solution. That role is precededby adsorption of the inhibitor molecules at the metal surface which decreases the extent of metal interaction with the corrosive ions (Negm et al, 2011). The inhibitors under investigation have high tendency towards adsorption at the different interfaces due to their high surface activity .…”

sym-Trisubstituted 1,3,5-Triazine Derivatives as Promising Organic Corrosion Inhibitors for Steel in Acidic Solution

“…It is obvious that Icorr values decreased with increasing inhibitor concentration and the corrosion protection occurred via blocking adsorption of T3Q, T3AMPy and T3EA on the active sites of steel, which enhances the corrosion protection performance of T3Q, T3AMPy and T3EA. The results can be explained on the basis of adsorption of T3Q, T3AMPy and T3EA molecules on the cathodic active sites, which retards the reduction of the H + ion and the corresponding hydrogen evolution by increasing the energy barrier for proton discharge [28,29]. In addition, the anodic dissolution of steel was decreased by the addition of the adsorbed molecules (T3Q, T3AMPy and T3EA) on the anodic active sites.…”