scholarly journals Corrosion Inhibition of Aluminium in HCl by Amine Modified Epoxy Resin

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Makanjuola Oki ◽  
Kayode Oki ◽  
John Otaigbe ◽  
Samuel Otikor
Keyword(s):  
Corrosion Rate ◽  
Epoxy Resin ◽  
Corrosion Inhibition ◽  
Langmuir Isotherm ◽  
Inhibitor Concentration ◽  
Acid Inhibitor ◽  
Immersion Period ◽  
Butyl Amine ◽  
Modified Epoxy ◽  
Hcl Solution

N-Butyl amine has been grafted unto Dow epoxy resin. The product was evaluated as an acid inhibitor by gravimetric techniques. The reduction in corrosion of aluminium in 1 M HCl solution was 92% at and 83% at with an inhibitor concentration of 100 ppm. The corrosion rate at this concentration was and mm/yr at and . For the specimens in HCl without inhibitor at 10-hour immersion period, the corrosion rate was and mm/yr, respectively, at and . Data obtained correlate with Langmuir isotherm.

Synergistic Effect of Thiourea and Surfactants on Corrosion Inhibition of Stainless Steel-410 in Presence of Sulfuric Acid

2014 ◽  
Vol 699 ◽  
pp. 186-191 ◽  
Author(s):  
Sami Ullah ◽  
Mohd Shariff Azmi ◽  
Muhammad Nadeem ◽  
Mohammad Azmi Bustam ◽  
Shaukat Ali Shahid ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Sulfuric Acid ◽  
Corrosion Rate ◽  
Corrosion Inhibition ◽  
Sodium Dodecyl ◽  
Ammonium Bromide ◽  
Inhibitor Concentration ◽  
Corrosion Rates ◽  
Inhibition Performance ◽  
Triton X

The inhibition of corrosion of stainless steel (SS)-410 in sulfuric acid using thiourea and three different surfactants, cetyle trimethyl ammonium bromide (CTAB), sodium dodecyl sulfate (SDS) and X-Triton was studied. Corrosion rates were determined by using corrosion coupons. The corrosion rate was found to be decreased with increase in inhibitor concentration. It was observed that the maximum corrosion inhibition occurred in the post micellar concentration of the surfactants. By optimizing the corrosion inhibition performance of different blends of surfactants and thiourea in 3 M H2SO4,the corrosion inhibition order was found as: Triton X-100 + thiourea > CTAB + thiourea > SDS + thiourea. The best results obtained by the addition of 200 ppm thiourea in 500 ppm of Triton X-100 in 3 M H2SO4acid solution. This blend decreased the corrosion rate of SS-410 to 657.66 mpy.

Evaluation of the Inhibitive Effect of Ibuprofen Drug on the Acidic Corrosion of Aluminium 6063 Alloy

2021 ◽  
Vol 886 ◽  
pp. 133-142
Author(s):  
Muyiwa Adedapo Fajobi ◽  
Ojo Sunday Issac Fayomi ◽  
Itopa Godwin Akande ◽  
Olayemi Abosede Odunlami ◽  
Olugbemiga Oluleke Oluwole
Keyword(s):  
Corrosion Rate ◽  
Corrosion Inhibition ◽  
Langmuir Isotherm ◽  
Regression Coefficient ◽  
Freundlich Isotherm ◽  
Polarization Experiment ◽  
Acidic Corrosion ◽  
Inhibition Potency ◽  
Potentiodynamic Method ◽  
Petrochemical Industries

This research examined the corrosion inhibition potency of inhibitive Ibuprofen drug (IID)on aluminium 6063. The effect of the inhibitive drug was tested in 0.5 M of H2SO4 solutionusing potentiodynamic method. The concentration of IID was mixed to the acidic mediumin 0, 5, 10, 15 and 20 ml respectively. The polarization experiment shows IID adsorbed onaluminium specimens. Increase in IID concentration decreases corrosion rate of aluminiumspecimens. Maximum inhibitive efficiency of 80.58 % and further studies on the inhibitoryeffect of the drug inhibitor revealed that Freundlich isotherm displayed a regressioncoefficient value of 0.7893 while Langmuir isotherm exhibits a regression coefficient valueof 0.8864. These values of regression establish the reliability of IID as inhibitor, whichshows that IID can be used as inhibitor corrosion of aluminium in aggressive environmentsuch as marine and petrochemical industries where protection of aluminium is a necessity.

scholarly journals SINTESIS GREEN INHIBITOR EKSTRAK DAUN TREMBESI (Samanea saman (Jacq.) Merr) SEBAGAI PEREDUKSI LAJU KOROSI LOGAM BAJA KARBON

Khazanah ◽  
2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Sarno Setiawan ◽  
◽  
Yusuf Nasrulloh ◽  
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Leaf Extract ◽  
Inhibitor Concentration ◽  
Green Inhibitor ◽  
Corrosion Medium ◽  
Weight Loss Method ◽  
Loss Method ◽  
Samanea Saman ◽  
Hcl Solution

Extract of trembesi leafs consist tannins compound that can reducing corrosion rate. This studey was to examine the efficiency of trembesi leaf extract as a inhibitors of corrosion rate. In this study, carbon steel metal was used as an immersion object in 10% HCl solution as a corrosion medium. Trembesi leaf extract were added in the corrosive medium with variations in volumes of 3, 6, 9, 12 mL with carbon steel immersion for 14 days. Corrosion rate was calculated using the weight loss method. The results shows, the lowest corrosion rate was obtained in the addition of 9 mL inhibitor concentration of 0.008989 cm/year and the highest corrosion rate was without the addition of an inhibitor of 0.011669 cm/year. The highest inhibitor efficiency value was 22.97% with the addition of 9 mL.

Corrosion Inhibition of Martensitic Stainless Steel in Chloride Medium by Calcium Gluconate-Solanum Tuberosum Extract as Surfactant

2019 ◽  
Vol 796 ◽  
pp. 103-111
Author(s):  
Olaitan Akanji ◽  
Olawale S. Fatoba ◽  
Esther Titilayo Akinlabi
Keyword(s):  
Stainless Steel ◽  
Solanum Tuberosum ◽  
Corrosion Rate ◽  
Corrosion Inhibition ◽  
Calcium Gluconate ◽  
Martensitic Stainless Steel ◽  
Inhibitor Concentration ◽  
Chloride Medium ◽  
Maximum Inhibition ◽  
Inhibition Performance

Corrosion inhibition of martensitic stainless steel (MSS) in magnesium chloride was investigated in the absence and presence of calcium gluconate as corrosion inhibitor at ambient temperature. The effects of inhibitor concentration were studied using weight loss and polarization method. The results obtained showed that calcium gluconate acts as an inhibitor for martensitic stainless steel in MgCl and decreases the corrosion rate. The inhibition performance was found to increase with the increase in inhibitor concentration. The maximum inhibition efficiency obtained was 99 % at 2g/v inhibitor concentration, the adsorption of calcium gluconate on the surface of Martensitic stainless steel was found to obey Langmuir adsorption isotherm. However, the addition of solanum tuberosum extract in the inhibitor decreases the corrosion rate of martesitic steel significantly in chloride solution.

Corrosion Inhibition of a Gas Sparged Copper Cylinder in a Solution of NaCl and Na2S by Using 4-Amino-4H-1,2,4-triazole as Corrosion Inhibitor

2016 ◽  
Vol 19 (3) ◽  
pp. 163-167
Author(s):  
Saad Said Al-Shahrani
Keyword(s):  
Activation Energy ◽  
Corrosion Resistance ◽  
Corrosion Rate ◽  
Corrosion Inhibition ◽  
Gas Flow ◽  
Inhibitor Concentration ◽  
Gas Velocity ◽  
Gas Flow Rate ◽  
Triazole Derivatives ◽  
Copper Cylinder

Most of previous investigations for corrosion inhibition of copper using triazole derivatives were carried out in stagnant conditions and mainly in presence either NaCl or Na2S. The main aim of this work is to investigate the performance of one of triazole derivatives namely, 4-Amino-4H-1,2,4-triazole (AHT) on improving the corrosion resistance of gas sparged copper parts in a solution comprised of NaCl and Na2S with different propotions. The potentiodynamic technique was used for investigating the effect of different variables on the corrosion rate of gas sparged copper such as gas velocity, initial S-2 concentration, gas sparged copper cylinder diameter, and initial AHT inhibitor concentration. The results show that the %improvement in corrosion resistance depends mainly on two main parameters, gas flow rate and amount of AHT inhibitor added. For lower gas velocities 0.07 cm/s the %improvement ranges from 6 to 22%, while for higher gas rate 0.35 cm/s it ranges from 2 to 7% depending on the amount of inhibitor added. The activation energy of the reaction was found to increase by approximately 20% by addition of the inhibitor up to 10ppm.

scholarly journals Corrosion Inhibition of Mild-Steel in 0.5 M HCl using some prepared 1,2,3-Triazoles Derivatives

2019 ◽  
Vol 9 (4) ◽  
pp. 290-304 ◽  
Author(s):  
Hawraa Kareem Dhaif ◽  
Ekhlas Q . Jasim ◽  
Zena A. Muhajjar ◽  
Ashwaq A. Shanta
Keyword(s):  
Activation Energy ◽  
Weight Loss ◽  
Corrosion Rate ◽  
Mild Steel ◽  
Langmuir Isotherm ◽  
Mixed Type ◽  
Inhibition Efficiency ◽  
Temperature Impact ◽  
The Impact ◽  
Hcl Solution

The Weight loss was employed to investigate the impact of triazole on mild-steel dissolution in 0.5 M HCl solution. The inhibitor’s inhibition efficiency was seen to increase with concentration yielding (81.61%,82.61%,88.29%,91.64%,94.32%) of (T9, T8, T6, T4, T1) at concentration 1×10-4 M HCl, at a temperature of 25°C for 240 min. At a temperature range from 25–45°C, we studied the temperature impact on the corrosion behavior, wherein the results demonstrated decrease in inhibition efficiency with rising in temperature to achieve (61.7%, 52.26%, 63.1%, 72.11%, 75.77 %) of (T9, T8, T6, T4 and T1) at a concentration of 1×10-4 M, at a temperature 45°C for 240 min. A study was also performed regarding the impact of temperature on the corrosion rate in the presence and absence of triazole. The activation energy and Kinetic parameters were calculated and discussed. Polarization curves revealed that the studied inhibitors represent a mixed – type inhibitors. Adsorption of inhibitors was found to obey Langmuir isotherm and was isotherm physisorption type.

Adsorption and corrosion inhibition characteristics of two medicinal molecules

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Hydrochloric Acid ◽  
Corrosion Rate ◽  
Mild Steel ◽  
Corrosion Inhibition ◽  
Half Life ◽  
Thermodynamic Data ◽  
Inhibition Efficiency ◽  
Gravimetric Method ◽  
Corrosive Environment ◽  
Corrosion Inhibition Efficiency

The corrosion inhibition characteristics of two medicinal molecules phenylalanine and rutin on mild steel in 1.0M Hydrochloric acid were evaluated using gravimetric method. Corrosion inhibition efficiency of 83.78 and 90.40 % was obtained respectively after seven days. However, phenylalanine showed weak accumulative higher corrosion inhibition efficiency. The presence of both molecules in the corrosive environment reduced the corrosion rate constant and increased the material half-life. Thermodynamic data calculated suggests a spontaneous adsorption of the molecules on the mild steel’s surface.

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