Mild Steel Corrosion Inhibition by Cucurbitamaxima Plant Extract in Hyddrochloric Acid Solution

2014 ◽  
Vol 3 (1) ◽  
pp. 16-22 ◽  
Author(s):  
◽  
Vasudha V. G.
Keyword(s):  
Acid Solution ◽  
Mild Steel ◽  
Corrosion Inhibition ◽  
Plant Extract ◽  
Steel Corrosion ◽  
Mild Steel Corrosion

scholarly journals Green corrosion inhibition of mild steel using Prunus Dulcis seeds extract in an acidic medium

2020 ◽  
Vol 26 (2) ◽  
pp. 171-178
Author(s):  
Frederick Okhakumhe Oshomogho ◽  
Thelma Ejiro Akhihiero ◽  
Osariemen Edokpayi ◽  
Joy Ehimwenma Ossai
Keyword(s):  
Activation Energy ◽  
Mild Steel ◽  
Corrosion Inhibition ◽  
Plant Extract ◽  
Steel Corrosion ◽  
Prunus Dulcis ◽  
Inhibitor Concentration ◽  
Mild Steel Corrosion ◽  
Soxhlet Apparatus ◽  
Inhibition Experiment

Synthetic inhibitors use by industries often have adverse effect on the environment. This work therefore investigates the use of plant extract as an  inhibition to mild steel corrosion in an acidic environment. Weight loss method was adopted to evaluate inhibition efficiency by plant extract as corrosion inhibitors. Almond seeds (Prunusdulcis) was extracted with the aid of Soxhlet apparatus. The corrosion inhibition experiment was  performed by setting up reactors containing mild steel coupon with variable concentrations of plant extract and 200ml of 1.5M HCl solution. The  study revealed that the extract was an efficient inhibitor and was most effective as the concentration increased from 0.81% at 0.01g/ml to 69.95% at 0.15g/ml respectively. Adsorption study on mild steel surface showed that the experimental data fitted better into the Temkin isotherm with regression R2 closer to unity. Arrhenius constant and activation energy estimated at temperatures 308K to 328K revealed that activation energy aE increased with increasing inhibitor concentration from 5348.23J/mol at 0.01g/ml to 6151.44J/mol at 0.05g/ml. The outcome of the study revealed  that mild steel is susceptible to corrosionwhich is capable of destroying the material and increasing inhibitor concentration and temperature has significant influence on the corrosion. Keywords: Mild steel, Corrosion, Inhibitor, Plant Extract, Adsorption

Electrochemical Studies of some New Mannich Bases Compounds as Corrosion Inhibitors for Mild Steel in Acidic Media

2012 ◽  
Vol 538-541 ◽  
pp. 2329-2333 ◽  
Author(s):  
Hui Xia Feng ◽  
Jian Li ◽  
Xiao Hong Gao
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibition ◽  
Corrosion Inhibitors ◽  
Steel Corrosion ◽  
Mannich Bases ◽  
Maximum Efficiency ◽  
Tafel Polarization ◽  
Mild Steel Corrosion ◽  
Polarization Studies ◽  
Inhibition Property

The corrosion inhibition behaviour of four selected Mannich bases compounds,namely 3-((N-methyl,N-phenyl)-methyl)2,4-Acetylacetone(MPMAA),3-((N-phenyl)-methyl) 2,4-Acetylacetone (PMAA),3-((N, N-diethyl)-methyl) 2, 4-Acetylacetone(DMAA) and 3-((N, N-methyl)-methyl) 2, 4-Acetylacetone (MMAA) as corrosion inhibitors for mild steel in 1M HCl solutions. Tafel polarization methods were performed to determine the corrosion parameters and inhibition efficiencies. Experimental results showed that PMAA is an excellent inhibitor for mild steel corrosion in 1M HCl solutions; showing a maximum efficiency 92.3% at concentration of 40mg/L. Polarization studies showed that the Mannich bases compounds can be regarded as mixed-type inhibitors and the inhibition efficiency of the four inhibitors followed the order PMAA > MPMAA > DMAA > MMAA. Then scanning electron microscope (SEM)techniques were also employed to examine the mechanism of corrosion inhibition property.

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