Fabrication of silane coating with improved protection performance using Mentha longifolia extract

Determination of Optimum Concentration of Benzimidazole Improving the Cathodic Disbonding Resistance of Epoxy Coating

“…The consequence of these contradictory issues was inferior and superior behavior of the epoxy coatings with one and 0.75 wt.% BIM, respectively. This was in agreement with the results of our previous works, where exceeding the optimum concentration of corrosion inhibitors adversely affected the coating performance [35,39]. In the case of organic inhibitors liberated from Mentha At the next step, different concentrations of benzimidazole (0 wt.%, 0.5 wt.%, 0.75 wt.%, and 1 wt.%) were introduced into the epoxy-polyamide coating formulation applied on ST37 substrate and cathodic disbonding test (−1.2 V vs. Ag/AgCl for 24 h) was conducted on the coated samples.…”

“…These results were in agreement with the data we acquired for some organic inhibitors in the chloride solution [35,36]. The organic molecules existing in the extract of Mentha longifolia in sodium chloride solution was reported to provide a maximum inhibition efficiency of 69.5% after 24 h [35]. We also found, in another research, that the presence of 4,5-imidazoledicarboxylic in NaCl solution led to a kind of corrosion inhibition for steel plates and the obtained impedance spectra during 24 h immersion had only a one time constant [36].…”

“…The replacement of a water molecule with the organic molecules (BIM) might be responsible for the drop in the double layer capacitance values after both five and 24 dipping durations. These results were in agreement with the data we acquired for some organic inhibitors in the chloride solution [35,36]. The organic molecules existing in the extract of Mentha longifolia in sodium chloride solution was reported to provide a maximum inhibition efficiency of 69.5% after 24 h [35].…”

“…In the case of organic inhibitors liberated from Mentha longifolia, the efficient concentration was 200 ppm and incorporation of 400 ppm caused coating to lose its integrity. In other words, the amount of this green inhibitor was suggested to have a negative effect on the film formation and to decrease the crosslinking density, making the film more permeable [35]. Interestingly, the disbonded surface area of epoxy-polyamide coating containing 0.75 wt.% BIM was approximately half of that of the rest after 24 h subjection to the cathodic disbonding test.…”

Innovative Method for Coating of Natural Corrosion Inhibitor Based on Artemisia vulgaris

“…Thanks to these studies, a new horizon has been discovered, since these substances are very efficient under different corrosive conditions, with superior ecological properties since they are biodegradable. For instance, N. Soltani and collaborators [ 7 ] studied the inhibitory character of Salvia Officinalis in austenitic stainless steel 304; H. Herrera-Hernández et al [ 8 ] investigated aloe vera gel on structural reinforcing steel, finding that this type of inhibitors are highly efficient for the protection of steels in different corrosive medium with protection efficiencies greater than 80% in comparison with steels without inhibitor addition, and many reports show that this type of inhibitor increases the useful life of materials by 80–90% [ 11 , 12 , 13 ].…”