Research Article
Optimization of Conversion Treatment on Austenitic Stainless Steel Using Experimental Designs
Table 5
Fractional factorial design (2
6-1): variables, their levels, and data of the responses (SS and
).
| No. | H2SO4 % | (°C) | Na2S2O8 | C3H4O % | Treatment time (min) | Surface state | SS | | | | g/L | | | |
(m2/m2) |
| 1 | 0.2 | 40 | 0.5 | 0 | 10 | Microball | 40.20 | 0.76 | 2 | 2 | 40 | 0.5 | 0 | 10 | Sanded | 15.10 | 0.45 | 3 | 0.2 | 70 | 0.5 | 0 | 10 | Sanded | 226.00 | 0.94 | 4 | 2 | 70 | 0.5 | 0 | 10 | Microball | 8.00 | 0.83 | 5 | 0.2 | 40 | 1.5 | 0 | 10 | Sanded | 131.20 | 0.90 | 6 | 2 | 40 | 1.5 | 0 | 10 | Microball | 6.40 | 0.27 | 7 | 0.2 | 70 | 1.5 | 0 | 10 | Microball | 160.10 | 0.92 | 8 | 2 | 70 | 1.5 | 0 | 10 | Sanded | 97.00 | 0.89 | 9 | 0.2 | 40 | 0.5 | 0.25 | 10 | Microball | 19.70 | 0.54 | 10 | 2 | 40 | 0.5 | 0.25 | 10 | Sanded | 83.70 | 0.31 | 11 | 0.2 | 70 | 0.5 | 0.25 | 10 | Sanded | 65.70 | 0.75 | 12 | 2 | 70 | 0.5 | 0.25 | 10 | Microball | 44.90 | 0.66 | 13 | 0.2 | 40 | 1.5 | 0.25 | 10 | Sanded | 95.30 | 0.71 | 14 | 2 | 40 | 1.5 | 0.25 | 10 | Microball | 44.70 | 0.46 | 15 | 0.2 | 70 | 1.5 | 0.25 | 10 | Microball | 29.20 | 0.76 | 16 | 2 | 70 | 1.5 | 0.25 | 10 | Sanded | 102.40 | 0.61 | 17 | 0.2 | 40 | 0.5 | 0 | 30 | Sanded | 164.70 | 0.91 | 18 | 2 | 40 | 0.5 | 0 | 30 | Microball | 5.30 | 0.75 | 19 | 0.2 | 70 | 0.5 | 0 | 30 | Microball | 142.80 | 0.94 | 20 | 2 | 70 | 0.5 | 0 | 30 | Sanded | 136.10 | 0.96 | 21 | 0.2 | 40 | 1.5 | 0 | 30 | Microball | 46.70 | 0.94 | 22 | 2 | 40 | 1.5 | 0 | 30 | Sanded | 139.60 | 0.94 | 23 | 0.2 | 70 | 1.5 | 0 | 30 | Sanded | 119.50 | 0.91 | 24 | 2 | 70 | 1.5 | 0 | 30 | Microball | 37.10 | 0.92 | 25 | 0.2 | 40 | 0.5 | 0.25 | 30 | Sanded | 47.40 | 0.77 | 26 | 2 | 40 | 0.5 | 0.25 | 30 | Microball | 54.20 | 0.73 | 27 | 0.2 | 70 | 0.5 | 0.25 | 30 | Microball | 10.20 | 0.49 | 28 | 2 | 70 | 0.5 | 0.25 | 30 | Sanded | 107.80 | 0.82 | 29 | 0.2 | 40 | 1.5 | 0.25 | 30 | Microball | 60.50 | 0.79 | 30 | 2 | 40 | 1.5 | 0.25 | 30 | Sanded | 146.40 | 0.84 | 31 | 0.2 | 70 | 1.5 | 0.25 | 30 | Sanded | 25.60 | 0.70 | 32 | 2 | 70 | 1.5 | 0.25 | 30 | Microball | 22.40 | 0.88 |
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