MPY

% PE

${\beta }_{\text{a}}$

mV

${\beta }_{\text{c}}$

mV

I_corr (µA/cm²)

−E_corr (mv)

Medium (w) %

18.89

-

237.1

251.39

40.8

581

Bare Metal

1.90

-

348.23

583.69

4.11

532

No inhibitor

0.12

94

270.42

185.21

0.25

448

1% henna extract

0.02

95.6

91.13

134.06

0.059

523

3% henna extract

0.07

95

241.35

270.1

0.17

494

6% henna extract

0.24

88.8

360.14

814.77

0.52

485

9% henna extract