Year: 1951
Type: article
Abstract: The electrodeposition of aluminum in the form of white or shiny adherent plates on various metals has been accomplished at room temperature. A satisfactory plating solution is prepared by mixing two moles of anhydrous aluminum chloride with 1 mole of ethyl pyridinium bromide, preferably in a dry, oxygen‐free atmosphere, to produce a liquid to which benzene (or toluene) is added until a second layer, principally excess benzene, forms on the top of the plating solution. Using an aluminum anode, plating may be carried out in a protected atmosphere at cathode current densities of approximately 1 amp/dm 2 (about 9 amp/ft 2 ) using voltages of the order of one volt. The use of an alternating current superimposed on the direct plating current ( a ) greatly improved adherence, e.g., a copper wire plated by this procedure can be repeatedly flexed without breaking the coating; ( b ) increased thickness without brittleness; ( c ) increased maximum current density; ( d ) somewhat lowered the voltage requirement; ( e ) gave the same efficiency based on the direct current; and ( f ) changed the appearance from shiny to satiny.
DOI: 10.1149/1.2778133
Authors: Frank H. Hurley, Thomas P. WIer
Institution: Rice University
Language: English
Subfield: Surfaces, Coatings and Films
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W1972945634