Novel pyrimidine-bichalcophene derivatives as corrosion inhibitors for copper in 1 M nitric acid solution

Abstract

This study targets the investigation of three pyrimidine derivatives (MA-1230, MA-1231, MA-1232) for the prevention of corrosion on copper in 1 M HNO3via weight loss (WL), potentiodynamic polarization (PDP), and electrochemical impedance spectroscopy (EIS) techniques.

Green inhibitor of carbon steel corrosion in 1 M hydrochloric acid:Eruca sativaseed extract (experimental and theoretical studies)

“…Table 2 reveals that the values rose as the inhibitor concentration was raised, indicating that the Eruca sativa seeds extract adsorption on the surface of carbon steel is due to physisorption. 80–82 The higher value of E a in the presence of extract was due to a larger energy barrier. This occurrence also suggests that the inhibitor and carbon steel form a complex combination.…”

“…The CPE element is used to explain the depression of the capacitance semi-circle, which correlates to surface heterogeneity. 114 The next equation gives the CPE impedance. : Ζ CPE = 1/ Υ 0 ( jω ) n …”

Electrochemical and quantum chemical studies on the corrosion inhibition of 1037 carbon steel by different types of surfactants

“… 40 In addition, the much less negative values of Δ S * in the presence of additives created a near-equilibrium corrosion system state. 41 …”

Aizoon Extract As a Novel Eco-friendly Corrosion Inhibitor For Stainless Steel430 in HCl Solution

“…Also, the peak related to C-H shifted from 2918 to 2921 cm -1 . Moreover, the peak that belongs to the carbonyl group for pure Aizoon extract was in 1715 and shifted to 1730 cm -1 when examined over SS430 surface after immersion in HCl-Aizoon mixture accompanied with a decrease in its intensity which supports the possibility of adsorption of Aizoon compounds on SS430 surface [32,33]. In other words, the shift in peaks can be assigned to the interaction between extract molecules and active sites on metal surface.…”