The Effect of pH on Static Barium Sulphate Inhibition Efficiency and Minimum Inhibitor Concentration (MIC) of Generic Scale Inhibitors

2012 ◽  
Author(s):  
S.S. Shaw ◽  
K.S. Sorbie
Keyword(s):  
Inhibition Efficiency ◽  
Barium Sulphate ◽  
Inhibitor Concentration ◽  
Effect Of Ph ◽  
Generic Scale

Inhibition of pipeline steel corrosion in acidic environment using sulphadoxine and pyrimethamine

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Inhibition Efficiency ◽  
Pipeline Steel ◽  
Electrochemical Techniques ◽  
Steel Corrosion ◽  
Acidic Environment ◽  
Inhibitor Concentration ◽  
Adsorption Data ◽  
Corrosion Inhibition Efficiency ◽  
Inhibitive Action ◽  
Sulphadoxine Pyrimethamine

The anti-corrosive properties of sulphadoxine + pyrimethamine (S+P) on the corrosion of pipeline steel in acidic environment were investigated using electrochemical techniques. The results obtained showed an excellent inhibition efficiency which increased with increase in inhibitor concentration. The corrosion inhibition efficiency increased up to 99.04 % at 0.01M S+P and decreased with rise in temperature down to 85.93 % at 333 K and 0.01 M S+P, suggesting a physiosorptive mechanism of adsorption. Also the adsorption data was fitted into Langmuir and Temkin adsorption isotherms, while the inhibitive action was shown to proceed by mixed inhibition mode.

scholarly journals Ethanolamines as Corrosion Inhibitors for Zinc in (HNO3+H2SO4) Binary Acid Mixture

2010 ◽  
Vol 7 (2) ◽  
pp. 665-668 ◽  
Author(s):  
R. T. Vashi ◽  
H. M. Bhajiwala ◽  
S. A. Desai
Keyword(s):  
Corrosion Rate ◽  
Acid Concentration ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Corrosion Behaviour ◽  
Acid Mixture ◽  
Inhibitor Concentration

This work deals with the study of corrosion behaviour for zinc in (HNO3+ H2SO4) binary acid mixture containing ethanolamines. Corrosion rate increases with concentration of acid and temperature. At constant acid concentration, the inhibition efficiency of ethanolamines increases with the inhibitor concentration. Value of ΔGa increases and inhibition decreases with temperature. The mode of inhibition action appears to be chemisorption.

Inhibition Action of Complex of Triethanolamine (TEA) and Na2WO4 for Brass in Simulated Cooling Water

2011 ◽  
Vol 347-353 ◽  
pp. 542-546
Author(s):  
Qun Jie Xu ◽  
Xian Qin Deng ◽  
Wen Li
Keyword(s):  
Synergistic Effect ◽  
Corrosion Inhibition ◽  
Inhibition Efficiency ◽  
Cooling Water ◽  
Ac Impedance ◽  
Inhibitor Concentration ◽  
Optimum Ratio ◽  
Inhibition Effect ◽  
Corrosion Inhibition Efficiency ◽  
Dc Polarization

The corrosion inhibition of brass in simulated cooling water by complex of triethanolamine (TEA) and Na2WO4 had been investigated by means of electrochemical (AC impedance and dc polarization) techniques. The results indicated that both TEA and Na2WO4 were able to inhibit the corrosion of brass in simulated cooling water. TEA showed the best inhibition effect for brass corrosion at the TEA concentration of 30 mg/L, and the inhibition efficiency was 45.35%. At the total inhibitor concentration of 20 mg/L, the complex of TEA and Na2WO4 had a good synergistic effect, and the optimum ratio of TEA to Na2WO4 is 1:9, corrosion inhibition efficiency was 89.08%.

scholarly journals Hexamine as Corrosion Inhibitors forZinc in Phosphoric Acid

2010 ◽  
Vol 7 (s1) ◽  
pp. S1-S6 ◽  
Author(s):  
R. T. Vashi ◽  
Diksha Naik
Keyword(s):  
Phosphoric Acid ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Polarization Curves ◽  
Inhibitor Concentration ◽  
Straight Line

The corrosion of zinc in phosphoric acid containing hexamine has been studied at different acid concentrations, inhibitor concentration and temperatures. Corrosion increases with the concentration of acid and the temperature. The inhibition efficiency (IE) of hexamine increases with the concentration of inhibitor. The IE decreases with the increase in concentration of acid. As temperature increases, percentage of inhibition decreases. The plot of log (Θ/1-Θ)versuslog C results in a straight line suggest that the inhibitors cover both the anodic and cathodic regions through general adsorption following Longmuir isotherm. Galvenostatic polarization curves show polarization of both anodes as well as cathodes.

scholarly journals Corrosion inhibition and statistical data of low carbon steel in HCl media by admixed organic compounds

2021 ◽  
Vol 2070 (1) ◽  
pp. 012149
Author(s):  
Roland Tolulope Loto ◽  
Cleophas Akintoye Loto ◽  
Richard Leramo ◽  
Babatunde Oyebade
Keyword(s):  
Carbon Steel ◽  
Organic Compounds ◽  
Corrosion Inhibition ◽  
Exposure Time ◽  
Inhibition Efficiency ◽  
Low Carbon Steel ◽  
Calculated Data ◽  
Carbon Steels ◽  
Low Carbon ◽  
Inhibitor Concentration

Abstract Corrosion inhibition of carbon steels with organic compounds exhibiting effective corrosion inhibition is an on-going research. The corrosion inhibition of low carbon steel in 1M HCl solution by the combined admixture of vanillin and benzonitrile (VBN), and salvia officinalis with lavendulan officinalis (SLV) was studied by weight loss method. Results obtained show that VBN and SLV performed effectively with maximum inhibition efficiency 91.03% at 1.5% VBN concentration and 97.89% at 5% SLV concentration. The inhibition efficiency of VBN increased with concentration but decreased with exposure time compared to the values obtained for SLV which showed non-dependence on concentration and exposure time after 1% SLV concentration. Correlation plots of inhibition efficiency versus inhibitor concentration show VBN to be more concentration dependent in performance. Calculated data for standard deviation shows the degree of variation from mean values for both compounds is significant at low inhibitor concentration due to time dependence action. Statistical analysis through ANOVA shows inhibitor concentration overwhelmingly influences the inhibition performance of the despite even though exposure time is statistically relevant to minimal degree.

scholarly journals Study of Corrosion Behavior of N’-(2-(2-oxomethylpyrrol-1-yl)ethyl)piperidine for Mild Steel in the Acid Environment

2021 ◽  
Vol 12 (3) ◽  
pp. 3638-3646
Keyword(s):  
Electron Microscopy ◽  
Mild Steel ◽  
Steel Surface ◽  
Inhibition Efficiency ◽  
Protective Layer ◽  
Solution Temperature ◽  
Inhibitor Concentration ◽  
Acid Environment ◽  
Experimental Findings ◽  
Scanning Electron

The corrosion inhibition of mild steel in 1 M hydrochloric acid solution by N'-(2-(2-oxomethylpyrrol-1-yl)ethyl)piperidine (N-OPEP) was studied employing weight loss techniques. The experimental findings revealed that N-OPEP is the most excellent corrosion inhibitor, and the inhibitory performance increases with an increase in the inhibitor concentration. Furthermore, the inhibition efficiency decreases with an increase in the solution Temperature. The adsorption of inhibitor molecules on a mild steel surface followed Langmuir’s isotherm model and was found to be spontaneous. Scanning electron microscopy (SEM) photographs approved the formation of a protective layer of the inhibitor molecules on the surface of mild steel.

scholarly journals Optimum prediction for inhibition efficiency of Sapium ellipticum leaf extract as corrosion inhibitor of aluminum alloy (AA3003) in hydrochloric acid solution using electrochemical impedance spectroscopy and response surface methodology

2020 ◽  
Vol 34 (1) ◽  
pp. 175-191 ◽  
Author(s):  
Onukwuli Okechukwu Dominic ◽  
Anadebe Valentine Chikaodili ◽  
Okafor Chizoba Sandra
Keyword(s):  
Response Surface Methodology ◽  
Corrosion Inhibitor ◽  
Response Surface ◽  
Acid Concentration ◽  
Leaf Extract ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
Coefficient Of Determination ◽  
P Value ◽  
Inhibitor Concentration

Statistical optimization was used to optimize corrosion inhibition efficiency of Sapium ellipticum leaf extract as corrosion inhibitor of aluminum in acid medium. Response surface methodology was applied, and the effects of four independent variables; acid concentration, inhibitor concentration, temperature, time, and their expected responses were determined. Central composite design a statistical tool was used to generate a total of 16 individual experimental runs, which was previously design to study the effects of these variables during corrosion process. The uniqueness of the model was scrutinized with various criteria including coefficient of determination (R2 = 0.987), p value (< 0.0001), adequate precision (30.22) and coefficient of variation (5.30). The RSM is well fitted in the model which adequately predicted the optimum inhibition efficiency of 96.73% at optimum inhibitor concentration of 1.5g/L-1, acid concentration 1 M, temperature of 303 K and time of 6 hours. Also the electrochemical concept signifies that Sapium ellipticum acts as a mixed-kind inhibitor. The experimental data obtained is in conformity with other research works.   Bull. Chem. Soc. Ethiop. 2020, 34(1), 175-191. DOI: https://dx.doi.org/10.4314/bcse.v34i1.17

scholarly journals Propargyl as Corrosion Inhibitor for Al-5%Si/15%SiC Composite in 0.5molar Sodium Hydroxide

2016 ◽  
Vol 11 (2) ◽  
pp. 141 ◽  
Author(s):  
F. Asuke ◽  
S.A. Yaro ◽  
O.B. Oloche
Keyword(s):  
Sodium Hydroxide ◽  
Corrosion Inhibitor ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Sodium Hydroxide Solution ◽  
Inhibitor Concentration ◽  
Corrosion Characteristic ◽  
Adsorption Free Energy ◽  
Mechanism Of Inhibition ◽  
Maximum Inhibition

The corrosion characteristic of Al-5%Si/15%SiC composite in 0.5molar sodium hydroxide solution (cauustic soda) using propargyl as corrosion inhibitors was investigated employing gravimetric and potential measurements. The research was carried out at different inhibitor concentrations, time and temperature rangges of 0.5 – 2.5% v/v, 1– 5 hours and 30 – 70 °C respectively. Results obtained revealed that propargyl is a moderate corrosion inhibitor for the composite, with maximum inhibition efficiency of 59.23% at 30 °C and inhibitor concentration of 1.5% v/v. Thermodynamic parameters such as heat of adsorption, free energy and activation energy were obtained from experimental data and the mechanism of inhibition was elucidated. The inhibitor is physically and chemically absorbed unto the surface of the composite.

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