Fig. 1: PDP curves and EIS Bode plots of Cu samples in 3 wt.% NaCl without and with 1 mM ImiH, BimMe, and SH-BimMe.

a–c PDP curves and d–f EIS Bode plots, recorded at 1, 30 and 100 h immersion time. Skeleton formulae of the three inhibitors are shown in d and e; for SH-BimMe the thiol tautomer is shown, although the thione tautomer is more stable in the solution; our DFT calculations further reveal that in the adsorbed state SH-BimMe exists either as thiolate or thione, but not as thiol29.