SIMS DETERMINATION OF THE SURFACE LITHIUM DEPLETION ZONE IN Al-Li ALLOYS BY QUANTITATIVE IMAGE ANALYSIS N. THORNE, A. DUBUS, J.M. LANG, F. DEGREVE et P. MEYER J. Phys. Colloques, 48 C3 (1987) C3-521-C3-526 DOI: 10.1051/jphyscol:1987360