Table 2 Adsorption isotherm parameters of the mild steel electrode surface in 1 M HCl containing different concentrations of the 6a and 6b at different temperatures.

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

Inhibitor name

Temp. K

Kads M−1

∆Gads kJ mol−1

6a

298

0.225

 − 30.524

303

0.114

 − 29.318

313

0.072

 − 29.096

323

0.083

 − 30.388

6b

298

0.211

 − 30.357

303

0.127

 − 29.583

313

0.071

 − 29.058

323

0.075

 − 30.123

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