Research Article
Inhibitory Mechanism of Carbon Steel Corrosion in Sea Water by an Aqueous Extract of Henna Leaves
Table 4
Analysis of variance (F-Test ).
| | Zn2+ (ppm) | Source of variance | Sum of squares | Degrees of freedom | Mean square | F | Level of significance of F |
| 25
| Between | 180 | 1 | 180 | 0.56
| P < 0.05
| | Within | 2560 | 8 | 320 | 50
| Between | 532 | 1 | 532 | 3.82
| P < 0.05
| | Within | 1115 | 8 | 139 |
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