Improvements in and relating to the production of composite metal sheet or strip

摘要

Titanium sheet is pickled in a cold aqueous solution of .12% HNO3.12%HF and pressure welded to platinum ships pickled in a hot aqueous p solution of 50% aqua regia. Tantalum, niobium, vanadium or zirconium may be used instead of titanium and are pickled in the following aqueous solutions respectively: .25%HF.25% HNO3 .20% HF.35% HNO3 .50% HNO3. .10% HF.25% HNO3