Intergranular Embrittlement of Copper-Palladium Alloys in Salt Water Available to Purchase

Intergranular embrittlement occurs when copper-rich Cu-Pd alloys are exposed to an aqueous 3.5 wt % sodium chloride environment. There is no evidence that the embrittlement reaction requires the presence of external or internal stresses for 2, 5, and 15 at % Pd in Cu. Scanning electron microscope (SEM) fractographic observations are reported for as-rolled, vacuum annealed, and hydrogen annealed alloys of composition 95 Cu-5 Pd.