Corrosion Inhibitive Effect of Novel Eco Friendly Corrosion Inhibitors for Mild Steel in 0.5 M HCl—A Comparative Study

Lavanya, D. K.; Frank, V. Priya; Vijaya, D.

doi:10.3103/s1068375520040080

Cited by 7 publications

(1 citation statement)

References 29 publications

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“…It can be seen from Table 4 the data that values for the inhibitors attains lower values for inhibitor-containing solutions. Similar results have been obtained in the corrosion inhibition of copper alloy and the decrease in signifies chemisorption 36 . The transition state equation ( 4 ) was used to calculate other important thermodynamic activation parameters 36 : where, k corr denotes to the corrosion rate, R is the molar gas constant, ΔH * and ΔS * is the enthalpy and entropy of activation, respectively.…”

Section: Resultssupporting

confidence: 85%

Experimental and computational chemical studies on the corrosion inhibition of new pyrimidinone derivatives for copper in nitric acid

Fouda

Ismail

Khaled

et al. 2022

Sci Rep

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Inhibition of copper corrosion by some pyrimidinone derivatives, namely; (E)-N-(3-((1,3-dimethyl-2,4,6-trioxohexahydropyrimidin-5-yl)diazenyl)-2,5-diethoxyphenyl)benzamide (MA-975) and(E)-6-(4-((4-chlorophenyl)diazenyl)-3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)-1,3 dimethylpyrimidine-2,4(1H,3H)-dione (MA-978C) in 1.0 M nitric acid (HNO3) was studied using weight loss (WL), electrochemical impedance spectroscopy (EIS), and potentiodynamic polarization (PP) measurements. The efficiency of inhibition increases as the concentration of inhibitor increases, and it also increases as the temperature increases. With the addition of the examined inhibitors, significant corrosion protection was obtained, and (MA-975) showed a very promising % IE (89.59%) at 21 × 10−6 M using the (WL) method. The polarization data revealed that these compounds act as mixed-type compounds and are adsorbed on the copper surface following Langmuir adsorption isotherm forming a protective thin film protecting the metal in the corrosive media. Scanning electron microscopy (SEM) and Energy Dispersive X-ray were used to examine the surface morphology of copper samples. Quantum calculations and Monte Carlo simulation techniques were applied with informative yields and the results matched the experimental findings.

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