Surface protection of copper in acid medium by azoles and surfactants

Lalitha, Appaswami; Ramesh, S.; Rajeswari, S.

doi:10.1016/j.electacta.2005.04.003

Cited by 189 publications

(86 citation statements)

References 19 publications

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“…The value of Q ads was negative this indicates that the process under study is spontaneous [25]. Generally, value of Q ads up to -20 kJ.mol -1 is consistent with electrostatic interaction between the charged molecules and the charged metal (physisorption) while those around -40 kJ.mol -1 or higher than that are associated with chemisorptions as a result of sharing or transferring of electrons from the organic molecules to the metal surface to form a coordinate type of bond [26]. It is well known that decrease in efficiency with the increase of temperature is attributed to the physical adsorption.…”

mentioning

confidence: 54%

Effect of Temperature on Corrosion Inhibition of Copper - Nickel Alloy by Tetraethylenepentamine Under Flow Conditions

Khadom¹

2014

J. Chil. Chem. Soc.

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The corrosion of copper -nickel alloy in hydrochloric acid was investigated at different temperatures, inhibitor concentrations, and corrosive solution rotation rates. Weight loss technique was used to evaluate the corrosion rate data. Tetraethylenepentamine was used as organic corrosion inhibitor, while hydrochloric acid was the corrosive solution. Different parameters, such as inhibitor efficiency, activation energy were obtained. Corrosion rate increased with both temperature and acid rotation rate, while it decreased with increases of Tetraethylenepentamine concentration. Maximum inhibitor efficiency was at lower level of temperature, acid rotation rate and higher level of inhibitor concentration.

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mentioning

confidence: 54%

Effect of Temperature on Corrosion Inhibition of Copper - Nickel Alloy by Tetraethylenepentamine Under Flow Conditions

Khadom¹

2014

J. Chil. Chem. Soc.

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“…It is generally known that the spontaneous dissolution of iron in acid solution produces Fe 2? ions, which corresponds to the anodic reaction, accompanied by discharging of electrons by hydrogen evolution at cathodic sites on the metal surface. Because of the general destructive attack of acid solutions, the use of inhibitors to control the aggressiveness of acid environment was found to have widespread applications in many industries [4]. The feasibility of protection methods depend mainly on the conditions and surrounding environment that materials, particularly metals, experienced during service conditions.…”

Section: Introductionmentioning

confidence: 99%

Mitigation of corrosion of carbon steel in acidic solutions using an aqueous extract of Tilia cordata as green corrosion inhibitor

2016

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The effectiveness of using Tilia cordata extract as a green corrosion inhibitor for carbon steel in 1 M hydrochloric acid solutions was demonstrated by employing some chemical and electrochemical techniques. The surface morphology of C-steel specimens was examined. The results showed that Tilia cordata has corrosion inhibition characteristics with efficiency of 96% as the concentration of Tilia cordata extract increased to 300 mg L -1 . Charge transfer resistance (R ct ) value increases while both the capacitance of the double layer (C dl ) and corrosion current (i corr ) values decrease with increasing the extract concentration. The effect of temperature was studied in the range 30-60°C. Some thermodynamic parameters were calculated and discussed. The adsorption of extract on the C-steel surface was found to obey Langmuir adsorption isotherm. Polarization results showed that the investigated extract acts as mixed type inhibitor. All the different used techniques gave similar results.

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“…This plant belongs to the family of Polygonaceae. In this paper the inhibiting effect of Rumex vesicarius L. extract on the carbon steel (CS) corrosion in H 2 SO 4 was studied by using weight loss (WL), potentiodynamic polarization (PP), electrochemical frequency modulation (EFM) and electrochemical impedance (EIS) techniques. Morphology of surface was measured using SEM.…”

Section: Introductionmentioning

confidence: 99%

“…Acidic solutions are utilized in several procedures such as; pickling of metals to eliminate scale, oil refinery by chemical procedures, components in rocket tools etc., [1][2][3][4] . Corrosion is the demolition of alloys and metals by electrochemical and chemical reactions with its environment.…”

Section: Introductionmentioning

confidence: 99%

Methanol Extract of Rumex Vesicarius L. as Eco-Friendly Corrosion Inhibitor for Carbon Steel in Sulfuric Acid Solution

2018

Chem Sci Trans

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Abstract:The inhibiting effect of Rumex vesicarius L. extract on the carbon steel corrosion in H 2 SO 4 was studied by weight loss, potentiodynamic polarization, electrochemical frequency modulation and electrochemical impedance techniques. The efficiency of the extract increased with increasing the extract concentration and with rising the temperature. The E a * (activation energy) and other parameters for the corrosion procedure have also been measured and discussed. potentiodynamic polarization measurements specified that this extract acts as mixed type inhibitor and chemically adsorbed on carbon steel surface following the Temkin isotherm. The data from different tests are in excellent agreement.

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Surface protection of copper in acid medium by azoles and surfactants

Cited by 189 publications

References 19 publications

Effect of Temperature on Corrosion Inhibition of Copper - Nickel Alloy by Tetraethylenepentamine Under Flow Conditions

Effect of Temperature on Corrosion Inhibition of Copper - Nickel Alloy by Tetraethylenepentamine Under Flow Conditions

Mitigation of corrosion of carbon steel in acidic solutions using an aqueous extract of Tilia cordata as green corrosion inhibitor

Methanol Extract of Rumex Vesicarius L. as Eco-Friendly Corrosion Inhibitor for Carbon Steel in Sulfuric Acid Solution

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