Effect of the Electrolyte Temperature and the Current Density on a Layer Microhardness Generated by the Anodic Aluminium Oxidation

Table 2

Conditions of the performed experiment.

Factor code	Factor	Unit	Factor level
			−2.37	−1	0	+1	+2.37
x1	(H2SO4)	mol·l^−1	0.09	0.87	1.43	1.99	2.76
x2	(C2H2O4)	mol·l^−1	0.06	0.13	0.18	0.23	0.30
x3		°C	−1.78	12	22	32	45.78
x4		min	1.22	15	25	35	48.78
x5		V	6.43	8.5	10	11.5	13.57