Synergistic effect of ionic liquid (IL) cation and anion inhibits negative difference effect on Mg in water - IL mixtures

Strong Negative Difference Effect (NDE) is present on Mg alloys in [mPEG n MPyr]ClO 4 -H 2 O and [BMPyr]AcO-H but not MPyr]AcO-H mixtures. The role of MPyr] + its synergy with AcO - water-ionic liquids mixtures were characterized combining surface analysis by ToF-SIMS, solution vibration spectroscopies molecular dynamics simulations. NDE was explained the “free” water phase formation when 2+ -ions expel initially H-bonded . Oxygen atoms can bond released water, inhibiting NDE. Water transport be reduced a condensed film, formed coordinated Al 3+ • MPyr]OAc-H suppression CP H-bonds H ions IL Etheric oxygen binds expelled from HO-H…O AcO- stabilizes against oxidation presence OH Condensed film blocking AZ61 contains , OAc both