scholarly journals Paraformaldehyde as a corrosion inhibitor for carbon steel in (%15) HCl

2021 ◽  
Vol 11 (2) ◽  
pp. 1-14
Author(s):  
Ghassan Burhan Yaqoob
Keyword(s):  
Weight Loss ◽  
Corrosion Inhibitor ◽  
Steel Surface ◽  
Adsorption Process ◽  
Steel Corrosion ◽  
Inhibitor Concentration ◽  
Langmuir Adsorption ◽  
Mechanism Of Inhibition ◽  
Weight Loss Method ◽  
Loss Method

The effect of paraformaldehyde in the solution of 15% HCL as an inhibitor of C-steel corrosion has been studied using the weight loss method. It was found that the efficiency of inhibitor increased by increasing the inhibitor concentration and decreasing temperatures. Also, the action of paraformaldehyde as a corrosion inhibitor has been attributed to the insoluble complexes was adsorbed on the C-steel surface. The iron complexes were identified by FTIR spectrum and the mechanism of inhibition was explained as Langmuir adsorption. The thermodynamic parameters of the adsorption process were calculated and explained.

scholarly journals L-Proline as a Green Corrosion Inhibitor in Aqueous Solutions for Carbon Steel

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Nisreen Faraj ◽  
Kareima A. Abdelghani ◽  
A.A. Idress ◽  
Dalal. M. Ibrahim
Keyword(s):  
Weight Loss ◽  
Steel Surface ◽  
Inhibition Efficiency ◽  
Steel Corrosion ◽  
Adsorption Properties ◽  
Green Corrosion Inhibitor ◽  
Chemical Technique ◽  
Weight Loss Method ◽  
Loss Method ◽  
Temkin Adsorption Isotherm

The chemical technique was used to investigate the inhibition and adsorption properties of L-proline for steel corrosion (weight loss method). As the concentration of L-proline increased, the inhibition efficiency increased, but decreased as the temperature increased, according to the findings. The inhibitor’s adsorption to the steel surface has been shown to be random, involving both electrostatic and chemisorptions. The Temkin adsorption isotherm governs the adsorption of L-proline to the steel surface. Thermodynamic parameters have been determined in some cases.

scholarly journals The inhibition of mild steel corrosion in 0.5 M H2SO4 solution by radish leaf extract

RSC Advances ◽  
2019 ◽  
Vol 9 (70) ◽  
pp. 40997-41009 ◽  
Author(s):  
Dongyi Li ◽  
Panpan Zhang ◽  
Xinyu Guo ◽  
Xiaowei Zhao ◽  
Ying Xu
Keyword(s):  
Weight Loss ◽  
Mild Steel ◽  
Electrochemical Method ◽  
Leaf Extract ◽  
Steel Corrosion ◽  
Inhibitory Effect ◽  
H2so4 Solution ◽  
Mild Steel Corrosion ◽  
Weight Loss Method ◽  
Loss Method

The inhibitory effect of radish leaf extract (RLE) on mild steel corrosion in 0.5 M H2SO4 was studied by the weight loss method and the electrochemical method.

Neem Leaf Extract as a Corrosion Inhibitor on Mild Steel in Acidic Solution

2018 ◽  
Vol 35 ◽  
pp. 208-220 ◽  
Author(s):  
Akindele Okewale ◽  
Felix Omoruwuo
Keyword(s):  
Weight Loss ◽  
Mild Steel ◽  
Corrosion Inhibitor ◽  
Leaf Extract ◽  
Steel Surface ◽  
Adsorption Mechanism ◽  
Mild Steel Surface ◽  
Freundlich Isotherms ◽  
Weight Loss Method ◽  
Neem Leaf Extract

The influence of neem leaf extract on corrosion inhibition of mild steel in 0.1 M HCl solution was studied using the weight loss method. Neem leaf extract which contains the double bond, carbonyl groups, and aromatic rings functional group as shown by the GCMS, phytochemical test, and FTIR analyses is one of the good natural plant extract that can be used as corrosion inhibitor. The weight loss on surface of mild steel at various inhibitor concentrations was determined. The highest inhibition efficiency of 93.24% was achieved using the neem leaf extract as corrosion inhibitor. Adsorption mechanism was investigated using Langmuir, Temkin, and Freundlich isotherms. Inhibitor adherence on the mild steel surface was spontaneous with the negative Gibb’s free energy value obtained. The mixed type adsorption mechanism (physisorption and chemisorption) is proposed for the inhibitor adsorption on mild steel surface. The inhibitor was adsorbed on the mild steel surface through adsorption of the phytochemical components on the surface of mild steel which protects the metal surface from corroding. The corrosion rate decreases from 0.001 to 0.0002MPY with increase in inhibitor concentrations and exposure time.

Research on Synthesis and Corrosion Inhibitory Performance of Diisopropylamine Methyl Urea

2015 ◽  
Vol 713-715 ◽  
pp. 2839-2842
Author(s):  
Fu Rong Zhou ◽  
Hu Zhang
Keyword(s):  
Weight Loss ◽  
Hydrochloric Acid ◽  
Corrosion Inhibitor ◽  
Polarization Curve ◽  
Reaction Temperature ◽  
Product Yield ◽  
Tafel Polarization ◽  
Weight Loss Method ◽  
Curve Method ◽  
Loss Method

Diisopropylamine methyl urea (DMU) was synthesized by raw materials of diisopropylamine, paraformaldehyde and urea in acid media, the effect of synthesis conditions including the dosage of hydrochloric acid, the mole ratio of the materials and the reaction temperature on the product yield were studied. A corrosion inhibitor formula that contained DMU, cyclohexylamine, ethanolamine and propiolic alcohol were designed, and static weight-loss method, Tafel polarization curve method were used to evaluate the corrosion inhibitory performance. The results showed that the best synthetic conditions for DMU were the mole ratio of diisopropylamine, paraformaldehyde and urea, 1:1.2:1; reaction temperature, 80°C; the mole ratio of hydrochloric acid and diisopropylamine 1.2:1. The product yield in this condition was 90.23%, the melting point was 230°C. The results of static weight-loss method revealed that DMU, cyclohexylamine, ethanolamine and propiolic alcohol had great synergy effect, the inhibition efficiency of gas phase static weight-loss method reached to 97.61%, and attained 85.20% in liquid phase static weight-loss method. The results of Tafel polarization curve method indicated that the corrosion inhibitor formula contained DMU had a good inhibitory effect to the cathode electrochemical corrosion process of A3 carbon steel.

scholarly journals Surface Protection of Steel by Adsorption of Milletia Pinnata Extract

2016 ◽  
Vol 13 (2) ◽  
pp. 101-105
Author(s):  
Monikandon Sukumaran ◽  
Kesavan Devarayan
Keyword(s):  
Weight Loss ◽  
Steel Surface ◽  
Inhibition Efficiency ◽  
Physical Adsorption ◽  
Ethanolic Extract ◽  
Steel Corrosion ◽  
Langmuir Adsorption Isotherm ◽  
Surface Protection ◽  
Langmuir Adsorption ◽  
Thermochemical Parameters

Steel corrosion inhibition in acidic and alkaline medium by ethanolic extract of Milletia pinnata is described in this study. The inhibitive behavior of the inhibitor is evaluated by weight loss measurements, adsorption isotherms, and thermochemical parameters. The inhibitor exhibited a maximum of 87% and 90.5% inhibition efficiency against steel corrosion in 0.5 M NaOH and 1.0 M H2SO4, respectively. The weight loss linearly fit to Langmuir adsorption isotherm with correlation coefficient value close to unity. The thermochemical parameters indicated for predominant physical adsorption of the inhibitor molecules on the steel surface.

scholarly journals New Corrosion Inhibitor Derived from Coumarin

2017 ◽  
Author(s):  
Ahmed Al-Amiery
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Weight Loss ◽  
Fourier Transform ◽  
Magnetic Resonance ◽  
Mild Steel ◽  
Corrosion Inhibitor ◽  
Damage Reduction ◽  
Weight Loss Method ◽  
Loss Method ◽  
Hcl Solution

New corrosion inhibitor derived from coumarin-3-amine namely 3-((2-chlorobenzylidene)amino)coumarin was synthesized and characterized by CHN elemental analysis in addition to Fourier transform infrared and nuclear magnetic resonance techniques. The anti-corrosion ability of 3-((2-chlorobenzylidene)amino)coumarin to inhibit the impacts of corrosion has been demonstrated and damage reduction of the mild steel also. 3-((2-chlorobenzylidene)amino)coumarin, has been employed as a good corrosion inhibitor for mild steel in HCL solution. The efficiency of the inhibition was figured according to weight loss method and it was 74.6%.

scholarly journals Corrosion Inhibition of Bark Extract of Euphorbia royleana on Mild Steel in 1M HCl

2019 ◽  
Vol 40 ◽  
pp. 25-29
Author(s):  
Bishal Thapa ◽  
Dipak Kumar Gupta ◽  
Amar Prasad Yadav
Keyword(s):  
Weight Loss ◽  
Mild Steel ◽  
Corrosion Inhibitor ◽  
Inhibition Efficiency ◽  
Bark Extract ◽  
Potential Measurement ◽  
Maximum Inhibition ◽  
Weight Loss Method ◽  
Loss Method ◽  
Loss Experiment

The bark extract of Euphorbia royleana as a green corrosion inhibitor was studied in 1M HCl using weight-loss method and potential measurement. The results show that the bark extract of Euphorbia royleana is an effective anti-corrosion inhibitor of mild steel in acidic media. The corrosion rate decreases with the time of immersion. Weight loss experiment shows that the loss in weight decreases with the time of immersion and inhibition efficiency increases with the concentration of extract. It was observed that maximum inhibition efficiency is 99.60% in 100% concentration of extract. Potential measurement study shows that bark extracts act as a mixed type of inhibitor i.e. inhibits both anodically as well as cathodically. 

Study on Corrosion Scale Inhibitor for Blast Furnace Gas TRT System

2013 ◽  
Vol 864-867 ◽  
pp. 1342-1345
Author(s):  
Fu Rong Zhou ◽  
Hu Zhang ◽  
Guang Wu Du ◽  
Wen Hua Wang
Keyword(s):  
Weight Loss ◽  
Blast Furnace ◽  
Corrosion Inhibitor ◽  
Inhibition Efficiency ◽  
Acid Anhydride ◽  
Scale Inhibitor ◽  
Corrosion Scale ◽  
Blast Furnace Gas ◽  
Weight Loss Method ◽  
Loss Method

Cyclohexylamine, morphine, ethanolamine, propiolic alcohol, seventeen alkenyl amide ethyl imidazoline, water depolymerization malaya acid anhydride, etc were chosen as the raw material of corrosion scale inhibitor in view of corrosion scaling reason and characteristic of blast furnace top gas pressure recovery turbine unit. The optimized formula of corrosion inhibitor have been obtained through orthogonal experiment. Corrosion and scale inhibitor performance were evaluated respectively by static weight-loss method, dynamic weight-loss method and calcium carbonate deposition. The results show that when these components are reasonable distributed, the corrosion effect is satisfied. When water depolymerization malaya acid anhydride is combined with the corrosion inhibitor, the corrosion and scale inhibition efficiency of composite inhibitor are more than 90%. Simulation blast furnace gas is adopted in dynamic simulation experiment, the corrosion inhibition efficiency is over 92%.

scholarly journals New 3,3'-((4-Aryl) methylene)bis(4-hydroxy-2H chromen 2- one) (MHO) derivatives as Corrosion Inhibitor

2020 ◽  
Vol 10 (4) ◽  
pp. 137-146
Author(s):  
Yasameen K. Al-Majedy ◽  
Hiba H. Ibraheem ◽  
Ali Jasem ◽  
Ahmed A. Al-Amiery
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Weight Loss ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Corrosion Inhibitor ◽  
Weight Loss Method ◽  
Loss Method ◽  
Scanning Electron ◽  
Surface Technique

New green natural particles as corrosion inhibitor namely, macromolecules were incorporated beginning from 4-hydroxycoumarin with 4-nitrobenzaldehyde in the presence of glacial acid (1) then synthesis with methyl bromoacetate after that this compound (2) used to synthesis of 2,2'-(3,3'-((4-nitrophenyl)methylene)bis(2-oxo-2H-chromene-4,3 diyl))bis(oxy)diacetohydrazide (3) when was refluxed with hydrazine hydrate when compound(2) refluxed with HCl to obtain compound (4)  and tested all the synthesis compounds on mild steel (MS) in 1 M HCl, 1M H2SO4 media by a weight loss method and identification of the surface technique employee scanning/electron/microscope (SEM) studies. The weight loss investigation demonstrated that inhibition performances have been improved via concentration raising of inhibitor. To support our results scanning electron microscopy was employed to clarify the surface of the MS with and without synthesis compounds in 1.0 M HCl and1.0M H2SO4 media.

Novel Compounds of Imidazole Derivatives as Effective Corrosion Inhibitors for Mild Steel in Hydrochloric Acid Solution

2020 ◽  
pp. 132-155
Author(s):  
Moussa Ouakki ◽  
M. Galai ◽  
Z. Aribou ◽  
M. Rbaa ◽  
B. Lakhrissi ◽  
...  
Keyword(s):  
Weight Loss ◽  
Acid Solution ◽  
Mild Steel ◽  
Steel Surface ◽  
Langmuir Adsorption Isotherm ◽  
Electrochemical Tests ◽  
Imidazole Derivatives ◽  
Weight Loss Method ◽  
Loss Method ◽  
Inhibition Performance

The inhibition performance of two imidazole derivatives, IM-Cl and IM-CH3, on the corrosion behavior of MS in 1M HCl acid solution was studied through weight loss method and electrochemical tests. The results obtained from the electrochemical methods show that inhibition efficiency increases with the increase of inhibitors concentration. The adsorption of inhibitors on the mild steel surface obeys Langmuir adsorption isotherm. The corrosion protection was once also investigated with the aid of UV–Vis spectrophotometry. SEM-EDX was performed and discussed for surface study of uninhibited and inhibited mild steel samples.

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