Table 7 Surface roughness parameters of C-steel surfaces before and after EP in 8 M H3PO4 solutions without and with QA derivatives.

From: Theoretical and electrochemical performance of Quinazoline Schiff-base hybrid as levelling agents for C-steel electropolishing in acidic medium

Parameters (µm)

Raw

Blank

p-(CH3)2N-QA

298K

0.76*10–3 mol/L

o-Cl-QA 298K

0.76*10–3 mol/L

m-CH3-QA

298K,

0.76*10–3 mol/L

313K,

3.43*10–3 mol/L

298K

3.43*10-3mol/L

Ra ± SD

540.20 ± 12.3

418.19 ± 10.5

14.15 ± 0.6

8.16 ± 0.3

7.95 ± 0.3

7.32 ± 0.3

4.67 ± 0.21

Rq ± SD

441.10 ± 9.8

556.63 ± 11.2

21.35 ± 0.9

11.09 ± 0.5

10.76 ± 0.4

9.22 ± 0.4

6.98 ± 0.35

PV ± SD

61.20 ± 2.1

54.63 ± 1.8

49.14 ± 2.0

42.05 ± 1.7

39.79 ± 1.6

36.62 ± 1.5

28.07 ± 1.2

Back to article page