Accession Number : AD0725504

Title :   Potentiostatic-Ellipsometric Studies of Titanium-Aluminum Binary Alloys in 3.5% Sodium Chloride Solution.

Descriptive Note : Research and Development rept.,

Corporate Author : NAVAL SHIP RESEARCH AND DEVELOPMENT LAB ANNAPOLIS MD

Personal Author(s) : Arora,O. P. ; Gudas,J. P.

Report Date : APR 1971

Pagination or Media Count : 22

Abstract : Polarization studies were conducted on two Ti-Al binary alloys in 3.5% NaCl solution at room temperature in the potention range -1 to +1 volt versus saturated calomel electrode. Effect on the anodic polarization behavior of the alloys of surface preparation, heat treatment, and alloy composition was studied. These parameters showed no effect on the maximum current density in the passive region. The current observed in this region was very small, indicating that a stable film is formed. The alloys showed a long passive region extending from -0.3 to +1.0 volt versus saturated calomel electrode. No transpassive behavior was observed. Ellipsometric studies were conducted on the kinetics of film growth on Ti-7Al alloy immersed in 3.5% NaCl solution. Effects of load and potential on the growth of film were studied. (Author)

Descriptors :   (*TITANIUM ALLOYS, *CORROSION), STRESS CORROSION, ALUMINUM ALLOYS, FILMS, COATINGS, OXIDES, SEA WATER, LIQUID IMMERSION TESTS, POLARIZATION, HEAT TREATMENT

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE