A Study of the Synthesis and Characterization of New Acrylamide Derivatives for Use as Corrosion Inhibitors in Nitric Acid Solutions of Copper

Abstract

The objective of this research was to explore the impact of corrosion inhibition of some synthetic acrylamide derivatives 2-cyano-N-(4-hydroxyphenyl)-3-(4-methoxyphenyl)acrylamide (ACR-2) and 2-cyano-N-(4-hydroxyphenyl)-3-phenylacrylamide (ACR-3) on copper in 1.0 M nitric acid solution using chemical and electrochemical methods, including mass loss as a chemical method and electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PP) as electrochemical methods. By Fourier-transform infrared spectroscopy (FTIR), proton nuclear magnetic resonance (1HNMR), and mass spectroscopy (MS) methods, the two compounds were verified and characterized. There is evidence that both compounds were effective corrosion inhibitors for copper in 1.0 M nitric acid (HNO3) solutions, as indicated by the PP curves, which show that these compounds may be considered mixed-type inhibitors. With the two compounds added, the value of the double-layer capacitance was reduced. In the case of 20 × 10−5 M, they reached maximum efficiencies of 84.5% and 86.1%, respectively. Having studied its behavior during adsorption on copper, it was concluded that it follows chemical adsorption and Langmuir isotherm. The theoretical computations and the experimental findings were compared using density functional theory (DFT) and Monte Carlo simulations (MC).

Corrosion Prevention of Copper in 2.0 M Sulfamic Acid Using Novel Plant Extract: Chemical, Electrochemical, and Theoretical Studies

“…On the basis of the charges of chelating atoms, inhibitors have been investigated to determine whether they stick to metallic surfaces. The likelihood that a metal’s d orbital will get an electron donation rises as the negative Mulliken charge of an adsorption site decreases . Mulliken charges for the lupine extract are broken down into carbon and heavy atoms (N and O).…”

Influence of Wax and Silver Nanoparticles on Preservation Quality of Murcott Mandarin Fruit during Cold Storage and after Shelf-Life

“…Ascorbic acid (vitamin C) concentration in fruits decreases with prolonged storage, as organic acids are consumed as substrates in respiration [75,89]. Despite this, the nanocoating material plus wax (wax + 100 ppm nanosilver) was better, as it kept the level of ascorbic acid above the control level throughout storage in both seasons (Table 4).…”

Chemical, electrochemical, and surface studies of Rosa damascene extract as a green corrosion inhibitor for carbon steel in sulfuric acid environment

“…It is found that the method of adsorption of the extract from a 1 M H 2 SO 4 on C-steel surface is an exothermic process by the negative ΔH ads sign that shows that the extract inhibition viability increments as the temperature increments. This behavior could be clarified by the reality that when temperature rises, more inhibitor particles adhere onto the metal surface [42], increasing the observed level of protection. The negative sign of the adsorption entropy (ΔS ads ) indicate that the disorder is reduced with the adsorption process [43,44].…”