| abstract |
A rust preventive for magnesium and/or magnesium alloys which contains as an active ingredient at least one member selected from the group consisting of compounds represented by the formulae (1) and (2) and salts of these; and a process for producing a part made of magnesium or a magnesium alloy, which comprises using the rust preventive. (1) (2) (In the formulae, R1 represents hydrogen or C1-4 alkyl; R2 represents hydrogen, C1-4 alkyl, mercapto, or hydroxy; R3 represents hydrogen, C1-4 alkyl, or hydroxy; A represents -N= or -C(R4)=; and R4 represents hydrogen or amino.) |