Accession Number : ADD008991

Title :   Pretreatment of Superalloys and Stainless Steels for Electroplating.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Chen,Edward S ; Baldauf,William

Report Date : 13 Jul 1981

Pagination or Media Count : 12

Abstract : Process for activating surfaces of superalloys and stainless steels prior to electroplating a metal such as chromium thereon, whereby a metal deposit having excellent adhesion to the substrate is obtained. The article is activated by anodic etching in a novel activation solution containing about 55% to 80% by volume of H2SO4 and about 1% to 10% by volume of commercial 52% hydrofluoric acid, preferably an aqueous bath containing 65% by volume of 95-98% H2SO4 and 5% by volume of 52% hydrofluoric acid at 30 A/dm to the second power and 20 degrees C for one minute. (Author)

Descriptors :   *Patent applications, *Stainless steel, *Superalloys, *Electroplating, Electroplating solutions, Surface analysis, Activation, Deposits, Preparation, Cleaning, Stresses, Layers, Etching, Adhesion, Substrates

Subject Categories : Metallurgy and Metallography
      Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE