Table 1 Wight loss parameters of 6a and 6b as inhibitors on the corrosion of mild steel in 1 M HCl for 24 h immersion period.

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

Temperature

Conc. of inhibitors (ppm)

∆W (g)

C.R (mmpy)

I.E (%)

Surface coverage (θ)

298 K

Blank

0.02091

4051.0350

–

–

6a

 50

0.00198

383.5987

90.5308

0.905

 100

0.00179

346.7887

91.4395

0.914

 200

0.00155

300.2919

92.5873

0.926

 500

0.00125

242.1709

94.0220

0.940

6b

 50

0.00187

362.2877

91.0569

0.911

 100

0.00135

261.5446

93.5438

0.935

 200

0.00120

232.4841

94.2611

0.943

 500

0.00101

195.6741

95.1698

0.952

Back to article page