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Title: Alloy surface activation by immersion in aqueous acid solution

Abstract

A process for surface activation or depassivation of an article, in particular an alloy, by immersion of the alloy in an aqueous acid solution. The surface activation methods of the present invention can be performed during a relatively short period of time and achieve reductions in production costs and provide environmental friendliness as compared to prior art processes. In a further embodiment, after surface activation, the article is immersed in a second liquid that prevents re-formation of a passivating oxide layer on the surface of the article. In a further embodiment the surface-activated alloys are subjected to surface engineering by a process that infuses carbon or nitrogen through the surface at a temperature sufficiently low to suppress precipitation of carbides or nitrides.

Inventors:
; ; ;
Issue Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1600194
Patent Number(s):
10450658
Application Number:
15/308,223
Assignee:
Case Western Reserve University (Cleveland, OH)
Patent Classifications (CPCs):
C - CHEMISTRY C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES C25D - PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS
C - CHEMISTRY C23 - COATING METALLIC MATERIAL C23C - COATING METALLIC MATERIAL
DOE Contract Number:  
AC07-05ID14517
Resource Type:
Patent
Resource Relation:
Patent File Date: 05/06/2015
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Li, Zhen, Ernst, Frank, Kahn, Harold, and Heuer, Arthur. Alloy surface activation by immersion in aqueous acid solution. United States: N. p., 2019. Web.
Li, Zhen, Ernst, Frank, Kahn, Harold, & Heuer, Arthur. Alloy surface activation by immersion in aqueous acid solution. United States.
Li, Zhen, Ernst, Frank, Kahn, Harold, and Heuer, Arthur. Tue . "Alloy surface activation by immersion in aqueous acid solution". United States. https://www.osti.gov/servlets/purl/1600194.
@article{osti_1600194,
title = {Alloy surface activation by immersion in aqueous acid solution},
author = {Li, Zhen and Ernst, Frank and Kahn, Harold and Heuer, Arthur},
abstractNote = {A process for surface activation or depassivation of an article, in particular an alloy, by immersion of the alloy in an aqueous acid solution. The surface activation methods of the present invention can be performed during a relatively short period of time and achieve reductions in production costs and provide environmental friendliness as compared to prior art processes. In a further embodiment, after surface activation, the article is immersed in a second liquid that prevents re-formation of a passivating oxide layer on the surface of the article. In a further embodiment the surface-activated alloys are subjected to surface engineering by a process that infuses carbon or nitrogen through the surface at a temperature sufficiently low to suppress precipitation of carbides or nitrides.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {10}
}

Patent:

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