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. 2018 Jun 7;8:8737. doi: 10.1038/s41598-018-27096-8

Figure 12.

Figure 12

(a) Electrochemical impedance spectroscopy (EIS) and (b) electrical equivalent circuit (EEC) model of mild-steel (MS), epoxy coated MS, graphene-epoxy coated MS and HEA-Gr composite-epoxy coated MS substrate in 3.5% NaCl solution.