Research Article
Electrochemical, Isotherm, and Material Strength Studies of Cucumeropsis mannii Shell Extract on A515 Grade 70 Carbon Steel in NaCl Solution
Table 9
Type III ANOVA result for hardness.
| | Source | Sum of Squares | df | Mean Square | value | value
| |
| | Model | 889.600 | 14 | 63.543 | 9.591 | <0.0001 | Significant | | -temperature | 573.304 | 1 | 573.304 | 86.537 | <0.0001 | | | -immersion time | 69.921 | 1 | 69.921 | 10.554 | 0.0054 | | | -inhibitor concentration | 35.326 | 1 | 35.326 | 5.332 | 0.0356 | | | -load | 166.954 | 1 | 166.954 | 25.201 | 0.0002 | | | 9.151 | 1 | 9.151 | 1.381 | 0.2582 | | | 0.226 | 1 | 0.226 | 0.034 | 0.8561 | | | 4.306 | 1 | 4.306 | 0.650 | 0.4327 | | | 0.391 | 1 | 0.391 | 0.059 | 0.8114 | | | 0.766 | 1 | 0.766 | 0.116 | 0.7386 | | | 0.331 | 1 | 0.331 | 0.050 | 0.8262 | | | 13.910 | 1 | 13.910 | 2.100 | 0.1679 | | | 0.639 | 1 | 0.639 | 0.096 | 0.7604 | | | 0.730 | 1 | 0.730 | 0.110 | 0.7446 | | | 1.964 | 1 | 1.964 | 0.296 | 0.5941 | | | Residual | 99.374 | 15 | 6.625 | | | | | Lack of fit | 91.306 | 10 | 9.131 | 1.658 | 0.0348 | Not significant | | Pure error | 8.068 | 5 | 1.614 | | | | | Cor. total | 988.974 | 29 | | | | |
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