Water-Soluble and Biodegradable Pectin-Grafted Polyacrylamide and Pectin-Grafted Polyacrylic Acid: Electrochemical Investigation of Corrosion-Inhibition Behaviour on Mild Steel in 3.5% NaCl Media

Abstract

Pectin-g-polyacrylamide (denoted as Pec-g-PAAm) and pectin-g-polyacrylic acid (denoted as Pec-g-PAA) were synthesized using pectin, acrylamide, and acrylic acid as starting materials. The grafted polymers were characterized using Fourier transform infrared spectroscopy (FTIR), thermogravimetric analyser (TGA), and scanning electron microscopy (SEM). The corrosion inhibition behaviour of the grafted polymers on mild steel in 3.5% NaCl was evaluated electrochemically through Tafel polarization and impedance studies. The corrosion inhibition performance of both the polymers was found to be around 85%.

Electron Beam Synthesis and Characterization of Acrylamide/Acrylic Acid Hydrogels Using Trimethylolpropane Trimethacrylate as Cross-Linker

“…For the polyacrylamide, the -CN stretching appears at 1350-1345 cm −1 and -C-O stretching at 1125-1116 cm −1 . The C-O-C asymmetric stretching and C-O stretching from AA are confirmed with the absorptions around 1190-1180 cm −1 and 1065-1025 cm −1 , respectively [20].…”

Hydrogels Synthesized by Electron Beam Irradiation for Heavy Metal Adsorption

“…For the polyacrylamide, the –CN stretching appears at 1350–1345 cm −1 and –C–O stretching at 1125–1116 cm −1 . The C–O–C asymmetric stretching and C–O stretching from AA are confirmed with the absorptions around 1190–1180 cm −1 and 1065–1025 cm −1 , respectively [ 58 ].…”

Recent developments in sustainable corrosion inhibitors: design, performance and industrial scale applications

“…The protection effectiveness of the starch modified with sodium dodecyl sulfate (DS) and cetyltrimethyl ammonium bromide (CMAB) was reported using chemical and electrochemical techniques [201]. Later on several other studies dealing with the anticorrosive effect of starch [202][203][204], pectin [205][206][207][208][209][210], dextrin & cyclodextrin [13,[211][212][213][214][215], pectate [216,217], algenates [218,219] and exudate gums [220][221][222][223][224][225] are reported for metals and alloys in different electrolytes. Synergistic effect of halide ions is also reported for different classes of biopolymers [226][227][228][229].…”