Inhibitive Action of Ferrous Gluconate on Aluminum Alloy in Saline Environment

Table 2

Electrochemical polarization parameters for aluminium alloy in 0.05 M NaCl solution in the absence and presence of ferrous gluconate at 28°C.

Concentration of inhibitor; (g/mL)	Current density; (A/cm^2)	Anodic Tafel constant; (V/dec)	Cathodic Tafel constant; (V/dec)	Linear polarization; (Ωcm^2)	Corrosion potential; (V)	Corrosion rate; (mm/yr)
0.0	8.59𝐸−06	0.05087	0.08004	1.57𝐸+03	−0.75893	0.27787
0.5	7.21𝐸−07	0.17081	0.39458	7.18𝐸+04	−1.05640	0.02334
1.0	4.96𝐸−09	0.74904	1.50350	4.38𝐸+07	−0.34318	0.00016
1.5	4.76𝐸−07	0.52492	0.54034	2.43𝐸+05	−0.57367	0.00554
2.0	6.49𝐸−09	1.92670	0.96634	4.30𝐸+07	−0.34318	0.00021