Corrosion Behaviour of Borated Aluminium Used as a Neutron Absorber

The electrochemical behaviour of pure and borated aluminium was examined. Measurements were performed at 90°C in two different electrolytes containing different trace amounts of chloride. For borated aluminium current transients, i.e. metastable depassivation events, were found. It is suggested that these transients are due to less stable passivation layers than are found in pure aluminium