scholarly journals Investigation of Corrosion Inhibition Efficiency of Some Synthesized Water Soluble Terpolymers on N-80 Steel in HCl, NaCl and Simulated Oil Well Water

2015 ◽  
Vol 33 (2) ◽  
pp. 85-104 ◽  
Author(s):  
R Geethanjali ◽  
S Subhashini
Keyword(s):  
Corrosion Inhibition ◽  
Inhibition Efficiency ◽  
Water Soluble ◽  
Well Water ◽  
Oil Well ◽  
Corrosion Inhibition Efficiency

Surface active hyperbranched polyamide-ester as a corrosion inhibitor for carbon steel in both neutral and acidic media

2015 ◽  
Vol 62 (2) ◽  
pp. 95-102 ◽  
Author(s):  
Heba Abdelrazik Mohamed ◽  
Mona Hassan Abdel Rehim
Keyword(s):  
Carbon Steel ◽  
Corrosion Inhibitor ◽  
Corrosion Inhibition ◽  
Inhibition Efficiency ◽  
Plain Carbon Steel ◽  
Water Soluble ◽  
Critical Aggregation Concentration ◽  
Content Type ◽  
Corrosion Inhibition Efficiency ◽  
Hyperbranched Polyamide

Purpose – The purpose of this paper was to protect carbon steel from corrosion with self–aggregated, eco-friendly, water-soluble hyperbranched polyamide-ester (Hb-PAE). Design/methodology/approach – Hb-PAE was synthesized through bulk polycondensation reaction between maleic anhydride and di-isopropanol amine. Complete structural analysis for the obtained polymer was performed using Fourier Transfer Infra-Red Spectroscopy, 1H NMR, Thermal gravimetric analysis (TGA) and differential scanning calorimetry, and the molar mass was measured using gel permeation chromatography/refractive index. For this study, the surface activity of Hb-PAE with hydroxyl end groups was investigated. Surface tension of 1.0 × 10−6 to 0.1M of both Hb-PAE/H2O and Hb-PAE/1N HCl systems was measured, and the critical aggregation concentration (CAC) in both systems was determined. Hb-PAE was examined as a corrosion inhibitor for plain carbon steel in both neutral (distilled water) and acidic (1N HCl) media. The corrosion of the steel was studied quantitatively by measuring its weight loss in both media in the absence and presence of Hb-PAE. The surface morphology of the exposed steel test samples was examined using scanning electron microscopy. Findings – It was found that Hb-PAE inhibited corrosion of steel around the CAC, and its corrosion inhibition efficiency was increased by increasing its concentration. Originality/value – The research can provide a reference for the relationship between the aggregation concentration of the prepared Hb-PAE with its corrosion inhibition efficiency on plain carbon steel. Hb-PAE as a corrosion inhibitor is environmentally acceptable, economical and readily available.

Adsorption and corrosion inhibition characteristics of two medicinal molecules

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Hydrochloric Acid ◽  
Corrosion Rate ◽  
Mild Steel ◽  
Corrosion Inhibition ◽  
Half Life ◽  
Thermodynamic Data ◽  
Inhibition Efficiency ◽  
Gravimetric Method ◽  
Corrosive Environment ◽  
Corrosion Inhibition Efficiency

The corrosion inhibition characteristics of two medicinal molecules phenylalanine and rutin on mild steel in 1.0M Hydrochloric acid were evaluated using gravimetric method. Corrosion inhibition efficiency of 83.78 and 90.40 % was obtained respectively after seven days. However, phenylalanine showed weak accumulative higher corrosion inhibition efficiency. The presence of both molecules in the corrosive environment reduced the corrosion rate constant and increased the material half-life. Thermodynamic data calculated suggests a spontaneous adsorption of the molecules on the mild steel’s surface.

scholarly journals A Comparative Study on the Corrosion Inhibition of Mild Steel and Aluminium by Synthesized Inhibitors in Organic Acidic Medium

2020 ◽  
pp. 41-51
Author(s):  
Lalita Saini ◽  
R. K. Upadhyay
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Mild Steel ◽  
Corrosion Inhibition ◽  
Acidic Medium ◽  
Trichloroacetic Acid ◽  
Inhibition Efficiency ◽  
Corrosion Inhibition Efficiency ◽  
Scanning Electron Microscope Method ◽  
Scanning Electron

Mass loss and Scanning Electron Microscope method (SEM) have been used to study the corrosion inhibition efficiency on mild steel and aluminium using synthesized inhibitors i.e. N-Benzylidene aniline (CI1) and N-Benzylidene 4-methylaniline (CI2) in Trichloroacetic acid (TCAA). Study reveals that both mild steel and aluminium are prone to corrosion in organic acid like TCAA. Out of these two metals, aluminium is more vigorously corroded by the TCAA in comparison to mild steel in same conditions and synthesized inhibitors CI1 and CI2 are almost same effective for mild steel and aluminium.

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