Experimental and quantum chemical characterization of the adsorption of some Schiff base compounds of phthaloyl thiocarbohydrazide on the mild steel in acid solutions

Experimental and theoretical studies of xanthan gum and its graft co-polymer as corrosion inhibitor for mild steel in 15% HCl

“…The impedance parameters of the mentioned equivalent circuit that have been extracted from the experimental data using CH Instrument Model 660C are listed in Table 5. Besides, inhibition efficiencies have also been calculated according to the following formula [32].…”

Synthesis and corrosion inhibition evaluation of novel aminic nitrogen-bearing 1,2,4-triazole Schiff base compounds

“…1 H and 13 C NMR spectra were recorded at 400 MHz and at 100 MHz, respectively. Chemical shits (δ) are reported in ppm, using the residual solvent peak (CDCl3 δ(H) = 7.26 and δ(C) = 77.16; DMSO-d6 δ(H) = 2.50 and δ(C) = 39.52 ppm) as internal standard.…”

“…The precipitate was filtered, washed with water (5 × 20 mL) and crystallized from ethanol (Scheme 1). 13 …”

“…Some researches reveal that the inhibition efficiency of the investigated Schiff bases is much greater than that for corresponding amines and aldehydes [12]. Moreover, the most widely used inhibitors in the field of copper corrosion in chloride containing media are the heterogeneous organic compounds having higher basicity and electron density on the hetero atoms such as nitrogen and sulphur [13,14]. Among these compounds, 1,2,4-triazole, its amino derivatives [15][16][17][18][19][20], thiophene [21], and pyrazole [22,23] are the most used inhibitors.…”

Preparation and characterization of novel polyurethanes containing 4,4′-{oxy-1,4-diphenyl bis(nitromethylidine)}diphenol schiff base diol

“…In particular, the Schiff bases such as azomethines that contain imine groups in the main chain are the potential materials that can display liquid crystal behavior [5,6], thermal stability [7,8], and electrical/photoelectrical properties [9,10] and can act as corrosion inhibitors [11,12]. In the literature, variety of different types of Schiff base polymers have been synthesized and characterized by spectroscopic and thermal techniques [13,14].…”