ELECTROLYTE SOLUTION AND METHOD OF REMOVING HYDROGEN FROM METALS

摘要

A method of removing hydrogen from the surface of a non-ferrous metal workpiece, including exposing the surface to a bath of an aqueous electrolyte solution including a concentration of citric acid from about 1.665 g/L to about 982 g/L and a concentration of ammonium bifluoride less than or equal to about 360 g/L, and being substantially free of a strong acid; controlling the temperature of the bath to be about -2 °C to about 90 °C; connecting the workpiece to the anode of a DC power supply and immersing a cathode of the DC power supply in the bath; and applying a current across the bath at a voltage and a current density measured as current per surface area of the workpiece.