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Journal of Spectroscopy
/
2015
/
Article
/
Tab 2
/
Research Article
Opuntia ficus-indica
Extract as Green Corrosion Inhibitor for Carbon Steel in 1 M HCl Solution
Table 2
Effect of
Opuntia ficus-indica
concentration on the
and
values obtained from EIS measurements at 25°C.
(ppm)
(Ohm cm
2
)
(
F cm
−2
)
IE
(%)
—
159
117.2
—
50
344
98.1
53
75
357
92.2
55
100
257
89.5
38
150
232
98.2
31
200
197
106.1
19
300
174
115.4
8