Synergistic effect of Mentha longifolia and zinc cations in silane primer coating to improve protection properties of the subsequent epoxy coating

Experimental and theoretical evidence for effective corrosion mitigation in mild steel using novel Garcinia gummi-gutta leaf extract

“…Similar results were observed in expired metformin drug used as green corrosion inhibitor in simulated oil/gas well and diameter of Nyquist plot increases with increasing inhibitor concentration (Haruna et al , 2020). %IE can be calculated by the subsequent equation (4) (Nikpour et al , 2019). …”

Electrochemical analysis of silane incorporated sodium dodecylbenzene sulphonate: zinc sulphate pre-treatment on mild steel and its effect on epoxy coating performance

“…The presence of C, O, Zn, Si and its binding energy values confirmed the presence of silane containing inhibitors on the mild steel surface, as shown in Table 1. The appearance of Zn 2p peak at a binding energy of 1023.23 eV and O 1s peak at a binding energy of 532.23 corresponds with zinc oxide and zinc hydroxide, respectively [9,23 25]. The appearance of Si 2p peak at a binding energy of 102.06 confirms the presence of silane [26].…”

“…The SDBS compound, which is hydrophobic in nature, can also prevent water from reaching the mild steel surface, thereby further reducing the possibilities of oxygen reduction reaction. The interaction of SDBS with Zn cations may lead to the formation of chelate compounds deposited on the mild steel that can also provide an inhibiting mechanism of the 3-GPS incorporated with SDBS:ZnSO 4 /epoxy [9,[42][43][44]. Thus, contributing to further reduction of adhesion loss of the epoxy coating when compared to neat silane pre-treatment after exposure to aggressive electrolyte.…”

“…This will lead to corrosion reactions and consequently the hydrolysis of the metal/coating interfacial bonds that can eventually lead to adhesion loss [6]. In order to prevent this, efforts were taken to incorporate inhibitors with the silane pretreatments before the coating is applied [7][8][9].…”

“…Studies on the eventual durability for such systems show much of its performance depend on the combination of adhesion strength of the coating applied and the substrate's resistance towards corrosion [10]. The silane pre-treatment helps to establish the interfacial chemical reactions that promote overall adhesion enhancement of coatings [11][12][13], while the effects of incorporating the inhibitors promotes complex formation on the metal surface that leads to passivation, thus retarding either the anodic or the cathodic reactions activities [8,9,14,15]. As such, both properties have been identified as key in extending the durability of any coating system.…”