Rothmannia longiflora extract as corrosion inhibitor for mild steel in acidic media

Akalezi, Chris O.; Oguzie, Emeka E.; Ogukwe, Cynthia E.; Ejele, E.A.

doi:10.1007/s40090-015-0050-z

Cited by 18 publications

(12 citation statements)

References 50 publications

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“…Maximum inhibition efficiency of 72.60% was obtained with inhibition concentration of 1.2g/l. similar result was observed by [10,31]. It showed that the extract of AS has excellent inhibitive ability for the corrosion inhibition process.…”

Section: Resultssupporting

confidence: 88%

Investigation of Akuamma Seed Extract on Corrosion Inhibition of Aluminum in Hydrochloric Acid Pickling Environment

Ezeugo

Onukwuli

Ikebudu

et al. 2019

EJCS

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Inhibitive impact of Akuamma seed (AS) extract toward 1.0M HCl corrosion of aluminum was examined using response surface methodology (RSM). Gravimetric (weight loss), potentiodynamic polarization and electrochemical impedance spectroscopy techniques were used in the corrosion inhibition process. In all the method used, the seed extract acted as good corrosion inhibitor of aluminum in 1.0M HCl solution. Optimal inhibition efficiency of 72.6% was obtained at optimum inhibition concentration of 1.2g/l, temperature of 304.19k and maximized time of 11.53hrs. It showed that the plant extract has excellent inhibitive properties for the corrosion inhibition process. The values of kads are relatively small indicating that the interaction between the adsorbed extract molecules and aluminum surface is a physical process. The (AS) extract protects aluminum against pitting corrosion. The level of protection increases with increase extract concentrations. The extract inhibited both cathodic and anodic reactions and acted as mixed-type inhibitor.

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Section: Resultssupporting

confidence: 88%

Investigation of Akuamma Seed Extract on Corrosion Inhibition of Aluminum in Hydrochloric Acid Pickling Environment

Ezeugo

Onukwuli

Ikebudu

et al. 2019

EJCS

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“…The scan was conducted across the regions to simulate reported electrochemical studies and also the electrochemical studies in our group regarding the anti-corrosion activities of adenosine. 1,[19][20][21] A lower current density (less deviation from 0 A for Fig. 4a) indicates higher resistance.…”

Section: Extended Time Microgravimetric Analysismentioning

confidence: 99%

Quartz Crystal Microbalance Study of Adenosine as Inhibitor for Fe Corrosion in HCl Solution

et al. 2016

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Adenosine is known to be a corrosion inhibitor for Fe-based metal. We report the real-time mass change due to the adsorption of adenosine molecules/complex on iron in HCl solution using the quartz crystal microbalance. It is proposed that the adsorption process of adenosine molecules/complex could happen along with iron dissolution process at rest potential. During polarization measurement, the mass loss of the surface of iron was positively related to the resistance of the solution with adenosine. It is believed that during the anodic reaction, the mass loss was caused by desorption of the pre-adsorbed adenosine molecules and also iron dissolution.

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“…In an acidic solution, the corrosion rate is related to the temperature according to the Arrhenius equation, according to which, the logarithm of the corrosion rate (log CR) is a linear function with 1/T [16,18]: (6) where CR is the corrosion rate, Ea is the activation energy (kJ/mol), A is the Arrhenius constant, R is the molar gas constant and T is the absolute temperature (K). The activation energy was determined using the slopes of log CR versus the 1/T graph depicted in Figure 2.…”

Section: Kinetics and Thermodynamic Studiesmentioning

confidence: 99%

Synergistic Corrosion Inhibition Effect of Rice Husk Extract and KI for Mild Steel in H2SO4 Solution

Pramudita

Sukirno

Nasikin

2019

Bull. Chem. React. Eng. Catal.

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The corrosion inhibition of rice husk extract for bio-corrosion in mild steel in 1 M of H2SO4 solution and the effect of adding potassium iodide were investigated using the weight-loss method with a variable solution temperature and various bio-inhibitor concentrations. The addition of potassium iodide can significantly increase the efficiency of rice husk extract. The highest efficiency is 95.89% at 1,250 ppm of inhibitor concentration at a temperature of 313 K. The inhibition efficiency of rice husk extract is synergistically increased with the addition of potassium iodide. The characteristics of the adsorption inhibitors were assessed using the Langmuir isotherm adsorption approach at all studied concentrations and temperatures. The synergy of rice husk extract and potassium iodide was examined using thermodynamic and kinetic parameters.because it has the advantage of being biodegradable and does not contain heavy metals or other toxic compounds.Rice husk is considered one of the most important agricultural wastes, and a great amount of research has been conducted on its use in various fields. It has a high silica content, which is a good advantage, especially for bio-corrosion inhibitors [3]. Rice husk extract (RHE) has the potential to be developed into a bio-corrosion inhibitor [4,5] and contains amorphous silica, which is safe and environmentally friendly.Recently, researchers have been paying more attention to mixed inhibitors because of their synergistic effects. The effect of the inhibitor mixture is better than the single inhibitor effect. Further, several authors have reported that halide (Iˉ) ions, which are known to stimulate and inhibit corrosion in acid solutions, can provide their own effective protection or can be com-

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Rothmannia longiflora extract as corrosion inhibitor for mild steel in acidic media

Cited by 18 publications

References 50 publications

Investigation of Akuamma Seed Extract on Corrosion Inhibition of Aluminum in Hydrochloric Acid Pickling Environment

Investigation of Akuamma Seed Extract on Corrosion Inhibition of Aluminum in Hydrochloric Acid Pickling Environment

Quartz Crystal Microbalance Study of Adenosine as Inhibitor for Fe Corrosion in HCl Solution

Synergistic Corrosion Inhibition Effect of Rice Husk Extract and KI for Mild Steel in H2SO4 Solution

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