Table 8 Comparison of the inhibition efficiency of pyrazolone-sulfonamide hybrids inhibitors with other related inhibitors.

From: Corrosion inhibition of mild steel in 1 M HCl by pyrazolone-sulfonamide hybrids: synthesis, characterization, and evaluation

Inhibitor

HCl concentration

IE%

Ref.

4-Amino-N-carbamimidoylbenzenesulfonamide

3%

97.6

1

N-(4,6-Dimethylpyrimidin-2-yl)-4-(quinazolin-4-ylamino)benzenesulfonamide

1 M

97.6

2

4-Amino-N-(pyrimidin-2-yl)benzenesulfonamide

1 M

94.0

3

4-Amino-N-(5-methylisoxazol-3-yl)benzenesulfonamide

1 M

93.2

3

4-Amino-N-(thiazol-2-yl)benzenesulfonamide

0.5 M

63.1

4

(E)-4-((3-Methyl-5-oxo-4,5-dihydro-1H-pyrazol-4-yl)diazenyl)benzenesulfonamide

1 M

95.4

5

(E)-4-((3-Methyl-5-oxo-1-phenyl-4,5-dihydro-1H-pyrazol-4-yl)diazenyl)-N-(thiazol-2-yl)benzenesulfonamide

1 M

96.6

This study