The rate of corrosion of titanium was determined in boiling 2M HCl when contacted to aluminum, cadmium, tin, zirconium, lead, bismuth, mercury, silver, copper, antimony, vanadium, 70:30, 50:50 and 30:70 copper-nickel alloys, iron, palladium, cobalt, nickel, gold, rhodium, platinum and iridium. Less extensive corrosion measurements of the same type were also made in 0.6 and 2M H2SO4. The potentials of the couple and of the two members of the couple were determined in boiling 2M HCl for 20 of the systems studied. A plot of the corrosion rate vs the couple potential yielded a polarization curve which was similar to the anodic polarization curve for titanium with an impressed voltage. The curve exhibited a maximum in corrosion rate at a couple potential of —0.49-volt vs the saturated calomel electrode. The potential of titanium in boiling 2 M HCl was also determined as a function of concentration of the following metallic cations in the acid: copper, silver, antimony, nickel, gold, palladium, rhodium, platinum and iridium. The influence of the cations on the corrosion rate was explained in relation to the polarization curve. 6.3.15
Effects of Foreign Metals on Corrosion of Titanium In Boiling 2M Hydrochloric Acid
W. ROGER BUCK, III, is a senior research chemist at the Virginia Institute for Scientific Research, Richmond, Virginia. He received a BS in chemistry from the University of Richmond in 1935 and a master's degree in physical chemistry from Duke University in 1940. Before coming to the Institute in 1952 he did college teaching. He is a member of the American Chemical Society, The Electrochemical Society and The National Association of Corrosion Engineers.
BILLY W. SLOOPE is Associate Professor of Physics at the University of Richmond and part time research scientist at the Virginia Institute for Scientific Research. He holds the PhD in Physics from the University of Virginia. His research interests include metal surfaces and the properties of thin films of metals.
HENRY LEIDHEISER, JR., is Director of Research of the Virginia Institute for Scientifc Research, a laboratory devoted to fundamental research in the physical sciences. Dr. Leidheiser holds the PhD in physical chemistry from the University of Virginia. His research interests are broadly in the field of the surface properties of metals and specifically in the fields of electroplating and corrosion.
