Investigation of Ziziphus Lotus Leaves Extract Corrosion Inhibitory Impact on Carbon Steel in a Molar Hydrochloric Acid Solution

Abstract

In this research, ZL leaves extract was used as a new friendly inhibitor for improving CS corrosion resistance in a 1.0 M HCl solution. The extract performance was evaluated by PDP and EIS techniques. The outcomes of this investigation showed that corrosion IE% of ZL leaves C2H5OH extract raised from 86 to 95%, with concentrations from 1 to 3 g/L. EIS method confirmed that the extract IE% was stable in the long-term. However, when the test temperature increased from 293 K to 323 K, IE% decreased from 95 to 90%. PDP experiments results revealed that ZL leaves extract operated as a mixed-type inhibitor, with anodic predominance.

Synthesis, characterization, and inhibition effects of a novel eugenol derivative bearing pyrrole functionalities on the corrosion of mild steel in a HCl acid solution

“…It should be mentioned that the inhibitor may be classified as either cathodic or anodic type if the displacement of the corrosion potential is larger than 85 mV concerning the corrosion potential of the blank. 30 The greatest corrosion potential of carbon steel in the present research was 80 mV, indicating a mixed type of inhibitor. In other words, compound 4's presence in HCl 1 M inhibited the dissolution of both anodic carbon steel and the generation of cathodic hydrogen.…”

“…In other words, compound 4 's presence in HCl 1 M inhibited the dissolution of both anodic carbon steel and the generation of cathodic hydrogen. 31 The literature has previously documented a comparable alteration in E corr values, suggesting that the inhibitor is considered a mixed-type inhibitor with a tendency towards anodic dominance. 30,31…”

“…31 The literature has previously documented a comparable alteration in E corr values, suggesting that the inhibitor is considered a mixed-type inhibitor with a tendency towards anodic dominance. 30,31…”

“…The shapes of the semicircles in the inhibited and uninhibited solutions were the same, suggesting that the addition of inhibitors did not affect the mechanism of carbon steel corrosion. 30 …”

“…Table 3 lists the impedance characteristics, double layer capacitance ( C dl ), solution resistance ( R s ), charge transfer resistance ( R ct ), and inhibition efficiency ( η %). The calculation of the inhibition efficiency ( η %) came from ( eqn (2) ): 30 where R ct and R ct 0 are charge transfer resistance in the presence and absence of compound 4.…”