Polyoxyethylene stearate of molecular weight 6000 as corrosion inhibitor for mild steel in 2.0 M sulphuric acid

Abstract

Polyoxyethylene stearate of molecular weight 6000 (P6000) as nonionic polymeric surfactant was prepared by the esterification reaction between citric acid with polyethylene glycol (Mwt. 6000) in the presence of para toluene sulfuric acid, PTSA as a catalyst. The chemical structure of the prepared polymeric surfactant was recognized by FT-IR spectra. The inhibition of P6000 on mild steel surface in 2.0 M H 2 SO 4 solution was investigated using different techniques such as open circuit potential, potentiodynamic polarization and weight loss. The inhibition efficiency of the used polymeric surfactant increases with increasing its concentration, but decreases with rising temperature. The potentiodynamic polarization proved that P6000 acted as a mixed inhibitor controlling both cathodic and anodic reactions. The inhibition process is the result of the adsorption of P6000 on the mild steel surface through the formation of barrier film which separates the mild steel from the corrosive medium. The adsorption of P6000 on steel surface follows Langmuir's isotherm.

Synthesis, characterization, and evaluation of polymeric surfactants derived from PET plastic waste as green corrosion inhibitor of steel surfaces in marine environment for heavy industry

“…7,15 Adsorption of the surfactant on the metal surface can signicantly alter the metal's ability to resist corrosion, 16,[27][28][29] making research into the relationship between adsorption and corrosion inhibition critical. 31,33,[40][41][42][43] PET was depolymerized using monoethanolamine and ethylene diamine in previous studies, [16][17][18][19][20][21][22][23][24] and the resulting nonionic surfactants were proven to be effective steel corrosion inhibitors in HCl. This article is part of a series aimed at reducing environmental pollution caused by the accumulation of plastic waste by recycling waste into modied products and evaluating the abilities of those modied products to prevent corrosion of metals and alloys in various aqueous conditions.…”

Chemical and Electrochemical Studies on Expired Lioresal Drugs as Corrosion Inhibitors for Carbon Steel in Sulfuric Acid

“…The present work introduces an idea for using and application of the expired Lioresal medicinal drug as a corrosion inhibitor for carbon steel in an aqueous acidic environment. Corrosion control of metals and alloys is so important and attractive field for more than 2000 scientists and researchers in the last decade [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Corrosion inhibitors are the best way to protect steel pipelines boilers and tanks from acidic, alkaline, and aqueous corrosive environments [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

“…Corrosion control of metals and alloys is so important and attractive field for more than 2000 scientists and researchers in the last decade [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Corrosion inhibitors are the best way to protect steel pipelines boilers and tanks from acidic, alkaline, and aqueous corrosive environments [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Organic corrosion inhibitors containing nitrogen, sulfur, oxygen, and heteroatoms are widely used for inhibition of steel in different corrosive media [21][22][23][24][25][26].…”

Inhibitive effect of Thymus satureioides essential oil as a green corrosion inhibitor for mild steel in an acidic medium

“…However, these techniques are often unsuitable when the metal is exposed to a corrosive medium for a long time. Therefore, the use of corrosion inhibitors is one of the most common methods applied for protecting metal or alloy surfaces in acidic environment [9][10][11][12][13][14].…”