“…Lombard (Sakamoto, 2000) 643 966 44,810 −7 59,410 Deming and Handricks (Sakamoto, 2000) 676 1018 39,410 −7 62,130 Borelius and Lindblom (Sakamoto, 2000) 453 823 72,610 −7 57,740 Ham (Sakamoto, 2000) 649 873 46,510 −7 55,310 Smithells and Ransley (Sakamoto, 2000) 521 1023 34,210 −7 50,380 Shcherbakova (Sakamoto, 2000) 623 873 31,810 −7 53,350 Gorman and Nardella (Sakamoto, 2000) 673 1123 36,010 −7 55,230 Belyakov and Ionov (Sakamoto, 2000) 623 873 54,210 −7 53,140 Gel'd (Sakamoto, 2000) 633 1123 75,510 −7 50,210 Fischer (Sakamoto, 2000) 423 996 19,910 −7 52,430 Robertson "best fit" (Robertson, 1973) 297 1333 33,310 −7 54,560 AD Le claire (Le Claire, 1983) 293 1343 33,310 −7 54,598 Desremaux/Laplanche (Desreumaux and Laplanche, 1984) 473 635 34,610 −7 56,106 Altunoglu (Altunoglu et al, 1991) 373 673 33,510 −7 54,240 Kuhn and Johnson (Kuhn and Johnson, 1991) 273 600 59,210 −7 54,900 This work 566 707 1.12 × 10 −7 46,499 sures (9 and 10 bar) at the two highest temperatures tested (683 K and 707 K): in these conditions, where the maximum permeation rate should be reached according to Eq. (4.3), the hydrogen permeation decreases or stalls instead of increasing; no clear explanation was found at this stage, but a possible cause could be attributed to the gas phase polarization effect, becoming important at higher permeation rates and gas pressures (Mourgues and Sanchez, 2005).…”