[en] Full text: In high activity nuclear waste containers design, a number of metals have been considered, among them carbon steels, stainless steels, high alloy steels, copper and titanium should be mentioned. Lead may also be useful for this purpose due to its good radiological and corrosion resistance in natural water properties. As disadvantage, its low creep resistance and toxicity should be mentioned. Corrosion tests results in commercial lead and lead-tin alloys, with tin contents ranging from 1 to 9 %, lead-antimony and lead bismuth with alloy content ranging from 1 to 3.5 % are reported. Those tests were performed in low salinity carbonated groundwater and in artificial seawater at 60 and 75 degree C. This test program is aimed to select an alloy with better corrosion resistance than commercial lead. It was found that lead-tin alloys fulfill this condition when tin concentration is equal to 3.5 % or higher. A lower corrosion resistance was found in Lead-Antimony and Lead-Bismuth alloys tests. Besides, a corrosion processes modeling in a container placed in a repository is intended. In a first stage, taking into account that for this particular container design, where a carbon steel liner is the external container wall, an iron corrosion process based on oxygen diffusion through a porous media (bentonite backfill) is proposed. No water radiolysis is taken into account because this phenomenon is negligible due to the internal thick lead container main barrier. The results of this model predict uniform corrosion and a low corrosion kinetics of the carbon steel external liner. It is due to the limited oxygen amount retained in the backfill pores and its low diffusion kinetics