A flowcell designed for the measurement of electrochemical parameters of materials undergoing impingement corrosion inflowing, once-through sea water is described. Electrode potentials were measured and potentiodynamic methods used which enabled cathodic and anodic polarisation characteristics to be determined. Two condenser tube materials, aluminium brass and cupronickel 66/30/2/2 were used in this work. Data have been obtained which have enabled a mechanism to be formulated to explain the protective action of iron-rich films formed on these materials by ferrous sulphate treatment of the sea water.
