Table 5 Electrochemical parameters for blank and varying concentration samples.

From: Investigation and evaluation of the efficiency of palm kernel oil extract for corrosion inhibition of brass artifacts

Sample

Rp

(Kohm cm2)

Beta a

(mV)

Beta c

(mV)

E(i = 0)

(mV)

Corrosion rate (C.R.) (µm/y)

Icorr

(µA/cm2)

Blank

0.047

201.3

− 183.2

25.7

7559.5

653

A

1%PKO

1.62

50.9

− 297.3

− 200.0

165.13

14.3

B

3%PKO

2.62

79.2

− 162.5

− 242.4

78.668

6.7954

C

5%PKO

2.59

58.3

− 98.4

− 247.8

54.566

4.7134

D

7%PKO

3.27

40.2

− 84.8

− 242.5

20.696

1.7878

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