Electrochemical, Isotherm, and Material Strength Studies of Cucumeropsis mannii Shell Extract on A515 Grade 70 Carbon Steel in NaCl Solution

Table 2

Factors and values at two levels for batch corrosion experiments.

Independent variables	Factor	Unit	Values of coded levels
			-1	+1
Temperature ()		^oC	30.0	60.0
Immersion time ()		Day	1.0	5.0
Inhibitor concentration ()		g L^-1	2	10
Load ()			15,000	30,000