If you mean a diaphram type mechanical fuel pump, probably not, especially if you install it downstream of the turbo.
We have water injection on the DC-6s where I work. The water injection pumps on those are basically a vane type fuel pump with different vanes, ours have aluminum housings (the vanes run in a steel insert). I would expect a manesium housing (like some Hilborn pumps) to corode while you watch if used in a water injection system. We use a soluable oil in very low concentrations to lubricate our pumps (Chevron "Soluable B") that might help if you tried one of the electric fuel pumps (Holly Black pump, or one of the lage Carters).
FWIW pre turbo water injection can lead to compressor erosion so that wouldn't be my choice.
