Valorization of Zea mays hairs waste extracts for antioxidant and anticorrosive activity of mild steel in 1 M HCl environment

Synergetic Effect between Phenolic Extracts of Ammi visnaga and Zea mays Formulation on the Corrosion of Mild Steel in 1 M HCl Solution

“…e corrosion inhibition effect gradually becomes better when the concentration of HE (ZM) in the mixture increases up to 0. [14], respectively. In the presence of the mixture HE (AV)/HE (ZM), the R p value increases up to 1272 Ω cm 2 , indicating that the melange improves consequent resistance and acts as good corrosion inhibitor.…”

“…Besides, the goal is to recycle ZM waste. In the presence of HE (AV) and HE (ZM) taken separately, the current densities are 49.81 µA cm −2 and 82.56 µA cm −2 , respectively [10,14]. However, i corr decreases significantly with the formulation which means that mild steel corrosion is intensely delayed by these inhibitors' mixture, and a strong synergism inhibitory effect is obtained between HE (AV) and HE (ZM).…”

“…It can be observed from Table 2 that the addition of different concentration of HE (ZM) in the mixture to the solution causes an increase in R ct and a decrease in C dl which confirms the synergistic inhibition effect between HE (AV) and HE (ZM). e highest ɳ EIS % values of individual HE (AV) [10] and HE (ZM) [14] are 91.94% and 93.97% at 0.01 gL −1 and 0.15 gL −1 , respectively. However, ɳ EIS % is 96.53% for the combination between 0.01 gL −1 HE (AV) and 0.2 gL −1 HE (ZM).…”

“…All Nyquist plots (A, B, and C) show an increase of loops size with increasing concentration of HE (ZM) in the mixture HE (AV)/HE (ZM) compared with that in the blank solution, indicating that the mixture slows down remarkably the corrosion process of mild steel. As seen from Figure 2, when the mixtures of HE (AV)/HE (ZM) are added in the solution, the diameters of semicircles become larger than those obtained by HE (AV) and HE (ZM) separately [10,14], suggesting that the corrosion process is further inhibited when HE (AV) is jointly used with HE (ZM) when compared to the separate use of individual inhibitor.…”

“…It is clear from these studies that the inhibitory properties of plant extracts are generally attributed to their variety and complex organic substances [13]. Recently, we presented electrochemical experimental evidence demonstrating that the hydroethanolic extract of Ammi visnaga [10] and the hydroethanolic extract of Zea mays hairs acted as a good corrosion inhibitor on mild steel in 1 M HCl solution [14]. PP studies have shown that HE (AV) functions as a mixed-type inhibitor and HE (ZM) acted as a mixed-type inhibitor with anodic predominant action in the hydrochloric acid system.…”