In galvanizing or electrodepositing copper on metal products for corrosion protection, the substrate metal may pick up hydrogen, resulting in embrittlement or swelling. Studies have been undertaken to understand the permeation of hydrogen in galvanized automotive steel components and hydrogen absorption during electrodeposition of copper. It is claimed that annealing the galvanized components at approximately 200 deg c for 4 to 24 h restores ductility by eliminating the hydrogen, but few experiments have been reported that quantify the hydrogen outgassing process. Similarly, in electrorefining copper, certain organic and inorganic compounds are added to the electrolyte to counteract impurities therein and to produce improved surface finishes. However, during electrorefining hydrogen is introduced into the finished product, reducing its ductility. The present investigations are part of an effort to characterize and measure the hydrogen released from galvanized steels at temperatures up to 800 deg c and to examine the relationship between the electrolyte composition and the quality of the electrodeposited copper.