Mitigation of acid corrosion on carbon steel by novel pyrazolone derivatives

Abstract

For the corrosion of carbon steel in 1.0 M HCl solution, the new pyrazolone derivatives (PY1 and PY2) have been identified as active corrosion inhibitors.

Tautomerism and antioxidant activity of some 4-acylpyrazolone-based Schiff bases: a theoretical study

“…Some pyrazolones have been used as fungicides and herbicides for crop protection, as dyes for cotton, wool, and silk, 3 as ligands for synthesis of metal complexes, 8 and as corrosion inhibitors. 9 Pyrazolones can exist in three tautomeric forms ( Fig. 1A) known as 3-pyrazolone (CH form), 4-pyrazolone (OH form), and 5-pyrazolone (NH form).…”

“…Some pyrazolones have been used as fungicides and herbicides for crop protection, as dyes for cotton, wool, and silk, 3 as ligands for synthesis of metal complexes, 8 and as corrosion inhibitors. 9 …”

A Study of 1-Benzyl-3-phenyl-2-thiourea as an Effective Steel Corrosion Inhibitor in 1.0 M HCl Solution

“…In the presence of BPTU, the OCP tends to shift towards negative potentials. e drop of OCP during the first 3000 seconds may be due to the dissolution of the oxide layer that formed previously when the low carbon steel contacted with the atmosphere [37]. erefore, the immersion time of one hour is chosen to reach a certain state for potentiodynamic polarization measurements.…”

Effect of 3-Nitroacetophenone on Corrosion Inhibition of Mild Steel in Acidic Medium

“…To control corrosion of the metal, its surface needs to be masked significantly with an organic or an inorganic interdict material to be segregated from corrosive territory or domain [8][9][10]. Application of molecules as an interdict species is the finest and most reliable practical technique to shield the metal from dissipation in an acidic medium [11][12][13]. It was reported that 4aminoacetophenonepyridine 2-aldehyde (4AAPA) inhibits the corrosion of the mild steel in 1 N HCl and maximum inhibition of 91% was achieved at a concentration of 60 ppm [14].…”