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International Journal of Corrosion
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International Journal of Corrosion
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2013
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Article
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Tab 6
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Research Article
Marjoram Extract as Corrosion Inhibitor for Dissolution of Zinc in 1.0 M HCl
Table 6
Impedance data and surface coverage for zinc electrode in 1.0 M HCl in absence and presence of different concentrations of Marjoram extract.
Inhibitor conc. (ppm)
Ω cm²
Ω cm²
µF cm
−2
(%)
0.00
0.95
51
22.30
—
100
1.15
198
19.43
74.10
200
1.30
318
17.11
83.50
300
1.95
353
15.13
85.60
400
2.13
385
10.85
86.30
500
2.65
440
9.53
88.80