THE ROLE OF GRAIN BOUNDARY STRUCTURE ON THE ELECTROCHEMICAL STABILITY OF PASSIVE FILMS FORMED ON HIGH PURITY POLYCRYSTALLINE NICKEL G. PALUMBO et K. T. AUSTJ. Phys. Colloques, 49 C5 (1988) C5-569-C5-574DOI: https://doi.org/10.1051/jphyscol:1988570