In this study, a comprehensive analysis of the pH-dependent contact angles, freezing temperatures and ice adhesion on aluminium samples is presented. It is not yet known whether externally applied electric fields or charged interfaces sufficiently affect the heterogeneous freezing and ice adhesion in order to provide technical solutions for refrigeration engineering, de-icing techniques and food preservation. It was found that surfaces charges that are generated on polished aluminium samples by changing the pH value of the adjacent KCl solution significantly reduce the advancing contact angle. The effect of surface charges on the freezing behaviour was determined by cooling an array of droplets of KCl solutions with pH values between 3 and 12 with a cooling rate of 1 K min⁻¹. Ice adhesion was evaluated using an in-house developed pusher test at -10 °C in a climate chamber. Both icephobicity tests revealed that surface charges seem ineffective to significantly change the freezing behaviour and ice adhesion strength on polished aluminium samples.