Research Article

Optimization of Conversion Treatment on Austenitic Stainless Steel Using Experimental Designs

Table 4

Doehlert design: theoretical values of coded variables and their levels for the experiments.

No. Treatment time (s) (°C)

11030055.00
2 018055.00
30.50.86627060.02
4 21049.98
50.5 27049.98
6 0.86621060.02
70024055.00