Experimental and theoretical study of [N-substituted] p-aminoazobenzene derivatives as corrosion inhibitors for mild steel in sulfuric acid solution

Shihab, Mehdi Salih; Al-Doori, Hanan Hussien

doi:10.1016/j.molstruc.2014.08.038

Cited by 43 publications

(12 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This fact suggested the physisorption, in which the electronic structure of the molecule is perturbed upon adsorption, causing electrostatic interaction between organic charged molecules and the charged metal to protect the metal from corrosive attack [24][25][26][27]. In the process of adsorption the fi rst step of corrosion inhibition is the transport of the inhibitor to the metal surface followed by another step: adsorption on the metal surface.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Experimental and theoretical study of some N-pyridinium salt derivatives as corrosion inhibitors for mild-steel in acidic media

Shihab

Mahmood

2016

Russ J Appl Chem

Self Cite

View full text Add to dashboard Cite

N-pyridinium salt derivatives (1-5) were prepared and investigated as corrosion inhibitors for mild steel in 1 M H 2 SO 4 solution at 30°C for 24 h. The corrosion inhibiting action was studied using weight loss measurements. The results demonstrated that the corrosion rate decreases, inhibition effi ciencies increase, and surface coverage degree increases with increasing inhibitor concentration. Inhibition effi ciencies for prepared N-pyridinium salt derivatives have highest inhibiting effi ciency for even low concentration. The values of ∆G°a ds showed physisorption effect for all prepared compounds. Molecular modeling systems were achieved for suggested inhibitors 1-5. Theoretical calculations could be used as a useful tool to obtain information for explaining the mechanism and nature of interaction between the metal surface and the organic molecule as a corrosion inhibitor.

show abstract

Section: Resultsmentioning

confidence: 99%

“…The resulting Fe 2+ ion coordinates with water molecules to form Fe 2+ (H 2 O)x. The anodic reaction may be written as [27]:…”

Section: Resultsmentioning

confidence: 99%

Experimental and theoretical study of some N-pyridinium salt derivatives as corrosion inhibitors for mild-steel in acidic media

Shihab

Mahmood

2016

Russ J Appl Chem

Self Cite

View full text Add to dashboard Cite

show abstract

“…Among all the adsorption mechanism descriptions reported in the literature [45][46][47][48], the most common model to describe this process is Langmuir's isotherms (equation 3). The corresponding adjustment for this model was performed, and the adjustment parameters are shown in Table 3.…”

Section: Adsorption Isothermmentioning

confidence: 99%

PREPRINT- Adsorption behavior of new theophylline-triazole based derivatives as effective corrosion inhibitors for steel in acidic medium

Espinoza-Vázquez¹,

Rodríguez-Gómez²,

Martínez-Cruz³

et al. 2019

Preprint

View full text Add to dashboard Cite

The design and synthesis of a series of theophylline derivatives containing 1,2,3-triazole moieties is presented. The corrosion inhibition activities of these new triazole-theophylline compounds were evaluated by studying the corrosion of API 5L X52 steel in 1 M HCl media. The results showed that an increase in the concentration of the theophylline-triazole derivatives also increases the charge transference resistance (Rct) value, enhancing inhibition efficiency and decreasing the corrosion process. The electrochemical impedance spectroscopy under static conditions studies revealed that the best inhibition efficiencies (~90%) at 50 ppm are presented by the all- substituted compounds. According to the Langmuir isotherm, the compounds 4 and 5 analyzed exhibit physisorption-chemisorption process, with exception of the hydrogen 3, bromo 6 and iodo 7 substituted compound, which exhibit chemisorption process. The corrosion when submerging a steel bar in 1 M HCl was studied using SEM-EDS. This experiment showed that the corrosion process decreases considerably in the presence of 50 ppm of the organic inhibitors. Finally, theoretical study showed a correlation between EHOMO, hardness (η), electrophilicity (W), atomic charge and the inhibition efficiency in which the iodo 7 substituted compound presents the best inhibitor behavior.

show abstract

“…Chromating the Zn coating surface or using organic molecules as chelating agents can provide a barrier between the Zn surface and aggressive media and thus prevent the formation of white rusty products. But chromium and organic molecules are harmful to the environment [2][3][4]. Therefore, designing novel zinc based composite coatings by adding second-phase particles into the Zn matrix has become a focus point of research on this material [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Effect of Graphene Oxide Concentration in Electrolyte on Corrosion Behavior of Electrodeposited Zn–Electrochemical Reduction Graphene Composite Coatings

et al. 2019

View full text Add to dashboard Cite

Pure Zn and Zn–ERGO composite coatings were prepared by direct current electrodeposition on 304 stainless steel. Samples were characterized by X-ray diffraction (XRD), scanning electron microscopy coupled with energy dispersive X-ray spectroscopy (SEM/EDS), and laser Raman spectroscopy (Raman). Results obtained have shown that the concentration of GO sheets in zinc sulfate electrolyte has an important effect on the preferred crystal orientation and the surface morphology of Zn–ERGO composite coatings. A study of the corrosion behavior of the coatings by Tafel polarization and electrochemical impedance spectroscopic (EIS) methods leads to the conclusion that the Zn-1.0 g/L ERGO composite coating possesses the best corrosion resistance compared to the pure Zn coating and other composite coatings in this study.

show abstract

Experimental and theoretical study of [N-substituted] p-aminoazobenzene derivatives as corrosion inhibitors for mild steel in sulfuric acid solution

Cited by 43 publications

References 27 publications

Experimental and theoretical study of some N-pyridinium salt derivatives as corrosion inhibitors for mild-steel in acidic media

Experimental and theoretical study of some N-pyridinium salt derivatives as corrosion inhibitors for mild-steel in acidic media

PREPRINT- Adsorption behavior of new theophylline-triazole based derivatives as effective corrosion inhibitors for steel in acidic medium

Effect of Graphene Oxide Concentration in Electrolyte on Corrosion Behavior of Electrodeposited Zn–Electrochemical Reduction Graphene Composite Coatings

Contact Info

Product

Resources

About