Protective effect of coatings on the corrosion behaviour of Ni based superalloys in gas turbines atmospheres F. Coen-Porisini, R. Saiu, F. Dos Santos Marques et F. Bregani J. Phys. IV France, 03 C9 (1993) C9-569-C9-578 DOI: 10.1051/jp4:1993960