scholarly journals Synthesis and Application of Phenyl Nitrone Derivatives as Acidic and Microbial Corrosion Inhibitors

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Shijun Chen ◽  
Kang Zhao ◽  
Gang Chen
Keyword(s):  
Inorganic Chemistry ◽  
Antibacterial Activity ◽  
Heterocyclic Compounds ◽  
Inhibitory Action ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
High Efficiency ◽  
Microbial Corrosion ◽  
Oilfield Chemicals ◽  
High Inhibition

Nitrone has drawn great attention due to its wide applications as a 1,3-dipole in heterocyclic compounds synthesis and the bioactivities. With the special structure, nitrone can also be used as ligand in inorganic chemistry. Based on the current research, the nitrones are anticipated to be effective inhibitors against acidic and microbial corrosion. The aim of this work is to investigate the inhibitory action of nitrones. In this work, a series of phenyl nitrone derivatives (PN) was synthesized and used as acidic and microbial corrosion inhibitors. The results indicate that several compounds show moderate to high inhibition efficiency (IE) in 3% HCl. Accompanied with HMTA or BOZ, the IEs greatly increase, and the highest efficiency of 98.5% was obtained by using PN4 + BOZ. Investigation of the antibacterial activity against oilfield microorganism shows that the nitrone derivatives can inhibit SRB, IB, and TGB with moderate to high efficiency under 1,000 mg/L, which makes them potential to be used as bifunctional oilfield chemicals.

scholarly journals Synthesis of 1,2,3-Triazole Derivatives and Its Evaluation as Corrosion Inhibitors for Carbon Steel

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Gabriel O. Resende ◽  
Sara F. Teixeira ◽  
Igor F. Figueiredo ◽  
Alexandre A. Godoy ◽  
Dafne Júlia F. Lougon ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Heterocyclic Compounds ◽  
Steel Surface ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Chemical Interaction ◽  
Synthetic Route ◽  
Acid Media ◽  
Carbon Steel Surface ◽  
Physical And Chemical

Heterocyclic compounds containing the 1,2,3-triazole moiety can be synthesized through click-chemistry, which is rapid reactions with good yields allowing the synthesis of great derivatives diversity by making minor changes in the reagents. The products were obtained with good yields through a synthetic route which uses ready available nonexpensive commercial reagents and without any further purification of any product or intermediate. The carbon steel anticorrosive activity was tested through weight loss and electrochemical assays in acid media. It was observed relevant inhibition efficiency (> 90%) for inhibitors 1 and 2. From Langmuir isotherm, it was hypothesized the adsorption of inhibitors on the carbon steel surface might occur by physical and chemical interaction; however, the activation energy raised suggests a physisorption process for the interaction of the inhibitor on the carbon steel surface.

scholarly journals Protection of Copper and its Alloys Using Corrosion Inhibitor-Literature Review

2010 ◽  
Vol 1 (1) ◽  
Author(s):  
Milorad V. Tomić ◽  
Miomir G. Pavlović ◽  
Milovan Jotanović ◽  
Regina Fuchs-Godec
Keyword(s):  
Corrosion Inhibitor ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Copper Alloys ◽  
Electrochemical Corrosion ◽  
Biological Molecules ◽  
Review Of The Literature ◽  
Research Application ◽  
Organic Inhibitors ◽  
High Inhibition

A review of the literature dealing with the electrochemical corrosion of copper and its alloys with purpose to find the most suitable inhibitor for its protection has been done. According to their chemical composition of corrosion inhibitors are divided into inorganic and organic inhibitors. Inhibition of alloying metals are possible (such as the addition of arsenic alloy components in brass, preventing its unzincanization). The paper reviews the theoretical basis of application of inhibitors to protect metals from corrosion as well as an overview of current research application of inhibitors to protect copper and copper alloys. Benzotriazole (BTA) is most often used corrosion inhibitor for copper and its alloys in acidic and alkaline solution, because of its high inhibition efficiency. The lowest concentration of inhibitor for protection of copper in various solutions was 0.05%, and for the protection of copper in contact with steel is 0.1%. On the surface of copper and brass BTA forms a protective Cu-BTA film. However, BTA is like many other synthesized organic inhibitors is very toxic and if used in very small concentrations. It turned out that the AETD, AETDA and PTAT good corrosion inhibitors of copper mixed type with the efficiency of inhibition increases with concentration. Due to the adverse effects on the environment, health and other bodies in recent times the focus of research is transferred to the inhibiting action of biological molecules or mixtures of natural compounds called „Green inhibitors“.

scholarly journals Peculiarities Of Triazoloazepinium Bromides Effect On Steel Microbial Corrosion

2018 ◽  
Vol 6 (2) ◽  
pp. 59-72
Author(s):  
Iryna Kurmakova ◽  
Olena Bondar ◽  
Victoria Vorobyova ◽  
Margarita Skiba ◽  
Olena Chygyrynets ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Mild Steel ◽  
Steel Surface ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Protective Layer ◽  
Protective Film ◽  
Microbial Corrosion ◽  
Sulfate Reducing ◽  
Reducing Bacteria

Triazoloazepinium bromides act as biocides against sulfate-reducing bacteria and can produce an effect on mild steel microbial corrosion. It has been established that under the competing adsorption, the compounds with the properties of corrosion inhibitors can form a film, which protects the steel surface, before it is settled by corrosively active microorganisms.The protective film ensures the inhibition efficiency of up to 98.7%. With triazoloazepinium bromides of the 2nd group, corrosively active microorganisms colonize the steel surface before the inhibitor creates the protective layer. In this case, the biocorrosion accelerates by up to 6.25 times. Different effect of triazoloazepinium bromides on steel biocorrosion rate is explained by the molecular structure.

scholarly journals Open Circuit Potential, Polarization and Thermometric Study of Guar Gum as Corrosion Inhibitor on Mild Steel by in Acidic Media

2020 ◽  
pp. 55-60 ◽  
Author(s):  
Rupesh Kushwah ◽  
R. K. Pathak
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibitors ◽  
Open Circuit Potential ◽  
Inhibition Efficiency ◽  
High Efficiency ◽  
Guar Gum ◽  
Open Circuit ◽  
Maximum Efficiency ◽  
Electrochemical Tests ◽  
Mixed Type Inhibitor

The influence of guar gum as inhibitors for mild steel (MS) dissolved in 1.0 M H2SO4 had been investigated via various electrochemical tests at 298 K. Open circuit (OC), Tafel plots had been examined. At first OCP shift found to be more negative values which clarify that guar gum having high efficiency as corrosion inhibitors. The inhibition efficiency (IE%) can be improved with improvement of concentration of inhibitor reaching maximum efficiency up to 89.37% at 298 K. The Tafel plots had been illustrated that a maximum difference of Ecorr 68 mV, that shows that the guar gum worked as mixed type inhibitor. Thermometry investigation shows maximum IE is found to be 86.99.

Recent Advances in 1,3,5-Triazine Derivatives as Antibacterial Agents

2020 ◽  
Vol 17 (8) ◽  
pp. 991-1041
Author(s):  
Divya Utreja ◽  
Jagdish Kaur ◽  
Komalpreet Kaur ◽  
Palak Jain
Keyword(s):  
Antibacterial Activity ◽  
Heterocyclic Compounds ◽  
Antibacterial Agents ◽  
Rapid Development ◽  
Pharmacological Action ◽  
Biological Properties ◽  
Vast Array ◽  
Bacterial Diseases ◽  
New Class ◽  
Triazine Derivatives

Triazine, one of the nitrogen containing heterocyclic compounds has attracted the considerable interest of researchers due to the vast array of biological properties such as anti-viral, antitumor, anti-convulsant, analgesic, antioxidant, anti-depressant, herbicidal, insecticidal, fungicidal, antibacterial and anti-inflammatory activities offered by it. Various antibacterial agents have been synthesized by researchers to curb bacterial diseases but due to rapid development in drug resistance, tolerance and side effects, there had always been a need for the synthesis of a new class of antibacterial agents that would exhibit improved pharmacological action. Therefore, this review mainly focuses on the various methods for the synthesis of triazine derivatives and their antibacterial activity.

Bioinspired Heterocyclic Compounds as Corrosion Inhibitors: A Comprehensive Review

2021 ◽  
Author(s):  
Lipiar Goni ◽  
Mohammad A. Jafar Mazumder ◽  
M. A. Quraishi ◽  
Mohammad Mizanur Rahman
Keyword(s):  
Heterocyclic Compounds ◽  
Corrosion Inhibitors ◽  
Comprehensive Review

scholarly journals Synthesis and Antibacterial Activity of New Spiro[thiadiazoline-(pyrazolo[3,4-d]pyrimidine)] Derivatives

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Mohammed El Fal ◽  
Youssef Ramli ◽  
Abdelfettah Zerzouf ◽  
Ahmed Talbaoui ◽  
Youssef Bakri ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Spectroscopic Data ◽  
Heterocyclic Compounds ◽  
Dipolar Cycloaddition ◽  
Bacterial Strains ◽  
Pyrimidine Derivatives ◽  
H Nmr ◽  
Biological Interest ◽  
Mic Value

New heterocyclic compounds spiroderivatives of allopurinol of biological interest were prepared from allopurinol via thionation and 1,3-dipolar cycloaddition and were produced in high to excellent yields. These compounds were characterized on the basis of spectral and spectroscopic data (1H NMR,13C, IR, and MS). The antibacterial activity of the synthesized products was studied using bacterial strains:Staphylococcus aureus,Enterococcus faecalis,Escherichia coli, andPseudomonas aeruginosa. Compounds having an ethyl group showed the best activity with MIC value of 31.25 µg/mL againstStaphylococcus aureusandStreptococcus fasciens.

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