Application of an Aqueous Extract of Cotton Seed as a Corrosion Inhibitor for Mild Steel in HCl Media

Application of a Mix of Vegetables Residues as Inhibitor for Carbon Steel

“…The maintenance of the aspect of the diagrams when the inhibitors were added to the solution suggests that the compounds only delay the corrosive process, without modifying its mechanism. Similar behavior has been observed in other studies in the literature [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] . The synergism of CBP and PKCP in the highest studied concentration with 1.11 g/L of each component, presented the highest impedance value, It can be observed that in the presence of any inhibitor concentration, in comparison to the control system, the presented time constant results in phase angle values in a wider frequency range, indicating a deceleration in the reactions involved.…”

“…For a better quantitative analysis of the general impedance behavior, the EIS diagrams in Figure 5 were fitted using an electric equivalent circuit (Figure 6) generally employed to model the impedance response of steel in acidic solutions with or without inhibitors [45][46][47] .…”

“…Some synthetic corrosion inhibitors have toxic properties that are harmful to the environment and human health. In this context, the use of natural inhibitors is beneficial both financially and environmentally, due to their biodegradability, ecological acceptance, and renewability 3 This includes, for example, Boswellia serrata 4 , Theobrama cacao 5 , Glycyrrhuza glabra 6 , and some vegetables, such as the garlic peel 7 , Xanthium strumarion 8 , castor bark 9 Cotton Seed 10 , Spilanthes acmella Leaves 11 , widely distributed and low economic value, including byproducts of agro-industrial processes and agricultural waste 12 .…”