A study was made of the permeation of D through 3N-purity Co foils. The data were described by:

D (cm2/s) = 8.3 x 10-3 exp[-11.8(kcal/mol)/RT]

for α-Co, and by:

D (cm2/s) = 3.4 x 10-2 exp[-13.8(kcal/mol)/RT]

for ε-Co.

G.R.Caskey, R.G.Derrick, M.R.Louthan: Scripta Metallurgica, 1974, 8[5], 481-6