Green Inhibitor from Thaumatococcus Daniellii Benn for Corrosion Mitigation of Mild Steel in 1 M HCl

2021 ◽  
Author(s):  
Jane Aimalohi Aigbogun ◽  
Matthew Ayorinde Adebayo
Keyword(s):  
Mild Steel ◽  
Green Inhibitor ◽  
Thaumatococcus Daniellii

Electrochemical behaviour of acetyl G as corrosion inhibitor for mild steel in acid medium

2015 ◽  
Vol 44 (6) ◽  
pp. 371-378 ◽  
Author(s):  
Y. Sangeetha ◽  
S. Meenakshi ◽  
C. Sairam Sundaram
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibitor ◽  
Acid Medium ◽  
Steel Surface ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
Electrochemical Behaviour ◽  
Green Inhibitor ◽  
Content Type ◽  
Mild Steel Surface

Purpose – The purpose of this paper is to develop an eco-friendly corrosion inhibitor for mild steel in 1 M HCl. Design/methodology/approach – A pharmaceutical drug acetyl G was investigated for its corrosion inhibition efficiency using weight loss method, potentiodynamic polarisation and electrochemical impedance spectroscopy. Findings – The inhibition efficiency increased with increase in inhibitor concentration. Results from polarisation studies revealed mixed type of inhibition. Impedance studies, scanning electron microscopy and Fourier transform spectroscopy confirm the adsorption of inhibitor on the mild steel surface. Research limitations/implications – The drug acetyl G has sulphur and nitrogen atoms which effectively block the corrosion of mild steel and is non-toxic and has good inhibition efficiency. Practical implications – This method provides an excellent, non-toxic and cost-effective material as a corrosion inhibitor for mild steel in acid medium. Originality/value – Application of this drug as a corrosion inhibitor has not been reported yet in the literature. Replacing the organic inhibitors, this green inhibitor shows excellent inhibition efficiency. This is adsorbed excellently on the mild steel surface due to the presence of long chain and hetero atoms. Thus, the drug retards the corrosion reaction.

Effect of Polar Extract of Cocoa Peels Inhibitor on Mechanical Properties and Microstructure of Mild Steel Exposed in Hydrocloric Acid

2015 ◽  
Vol 776 ◽  
pp. 193-200 ◽  
Author(s):  
Gunawarman ◽  
Yuli Yetri ◽  
Emriadi ◽  
Novesar Jamarun ◽  
Ken-Cho ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mild Steel ◽  
Theobroma Cacao ◽  
Steel Surface ◽  
Sample Surface ◽  
Total Carbon ◽  
Inhibition Mechanism ◽  
Green Inhibitor ◽  
Mild Steel Surface ◽  
Weight Loss Method

Effect of addition of theobroma cacao peels extract (TCPE), a new proposed green inhibitor, on tensile and hardness properties, and related microstructure of mild steel exposed in solution of 1.5M HCl was investigated in order to know the contribution of this kind of inhibitor in controlling mechanical properties, in addition to reducing corrosion attack. Corrosion behaviors including inhibition mechanism and adsorption process during exposure were then discussed. Corrosion rate and inhibitory efficiency of mild steel samples containing 0.3%C were determined using weight loss method. The samples were exposed in the acid solution with and without addition of 0.5-2.5% the TCPE. Tensile and hardness tests were subsequently performed on the samples to determine the change of mechanical properties of the metal prior and after addition of the extracts. Sample surface morphologies and chemical composition as well were observed by a scanning electron microscopy equipped with energy dispersive X-ray spectroscopy (SEM-EDX). The results show that the strength, hardness and elongation of mild steel drop significantly due to heavy damage in the surface after immersion in the HCl solution for 32 days. However, these mechanical properties gradually increase with increasing concentration of the extract following the increase of surface coverage and inhibition efficiency. The increase of the tensile properties and hardness is due mainly to the ability of the inhibitor to cover mild steel surface through formation of metal-organo complexes protection layer in the surface of the mild steel. Although total carbon level in the surface of the mild steel also increases significantly, there is no any proof of carbon difussion into the mild steel. The addition of polar extract of theobroma cacao peels into a solution of 1.5 M HCl is, therefore, not only effective to minimize the degradation on the mild steel surface, but it also diminishes the mechanical properties reduction of the mild steel.

A descriptive study for corrosion control of low-alloy steel by Aloe vera extract in acidic medium

2016 ◽  
Vol 34 (4) ◽  
pp. 241-248 ◽  
Author(s):  
Shefali Dahiya ◽  
Suman Lata ◽  
Parmod Kumar ◽  
Rajeev Kumar
Keyword(s):  
Mild Steel ◽  
Alloy Steel ◽  
Electrochemical Impedance ◽  
Aloe Vera ◽  
Gravimetric Analysis ◽  
Low Alloy Steel ◽  
Green Inhibitor ◽  
Quantum Analysis ◽  
Physical Type ◽  
Hcl Solution

AbstractMethanol extract of Aloe vera leaves (AE) as a green inhibitor for controlling corrosion of low-alloy steel (mild steel) in 0.5 m HCl solution was studied using gravimetric analysis, potentiostatic polarization measurements, electrochemical impedance spectroscopy and quantum analysis. The results obtained revealed that AE has fairly good inhibiting properties against corrosion of mild steel in 0.5 m HCl solution, with efficiency >97%. Also, the inhibition was mixed type that follows the Langmuir adsorption isotherm. The value of ΔG reveals that AE inhibits the corrosion rate via physical type adsorption on the mild steel surface which is further supported by Dubinin-Radushkevich isotherm.

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