FIELD: metallurgy. SUBSTANCE: invention relates with aluminium alloy producing at 18-25% lithium content. After alloy melting thermochemical working is carried out at 250-350 C in carbon dioxide atmosphere for 2-3 hr. Reaction involves interaction of surface oxides and lithium hydroxide with carbon dioxide and protective film of lithium carbonate is formed. EFFECT: decreased hydrogen content in alloy, prevention of secondary lithium interaction with atmosphere steam.
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