Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

The Electrodeposition of Aluminium-Niobium Alloys From Chloroaluminate Electrolytes

Published

Author(s)

Gery R. Stafford, G Haarberg

Abstract

The electrochemical behavior of niobium in a 52:48 mole ratio A1C13:NaC1 molten salt electrolyte was examined by liner sweep voltammetry, chronoamperometry and chronopotentiometry at 190 C. Niobium oxidation begins at about 1.10 V vs. A1 but appears to be limited to a charge of about 4mC/cm2 before the electrode becomes inhibited. This inhibition is likely due to limited solubility of the niobium oxidation product. The inhibition region extends from about 1.20 V to 1.40 V. At higher oxidation potentials, the current can be continuously increased up to the anodic limit of the chloroaluminate electrolyte. Gravimetric analysis during oxidation indicates that the dissolution of Nb at 1.50 V is a two-electron process. Aluminium-niobium alloys can be electrodeposited from the above electrolyte following Nb dissolution. Alloys containing a Nb atomic fraction of up to 13.5% have been electrodeposited. X-ray diffraction and transmission electron microscopy examination of these electrodeposits indicated that the low Nb concentration deposits (
Conference Dates
August 12-17, 1997
Conference Location
RU
Conference Title
NATO Advanced Research on Refractory Metals in Molten Salts

Keywords

aluminium-niobium alloys, chloroaluminate, electrochemical transients, electrodeposition, niobium dissolution

Citation

Stafford, G. and Haarberg, G. (1998), The Electrodeposition of Aluminium-Niobium Alloys From Chloroaluminate Electrolytes, NATO Advanced Research on Refractory Metals in Molten Salts, RU (Accessed December 10, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created August 1, 1998, Updated February 17, 2017