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Title: Method of coating metal surfaces to form protective metal coating thereon

Abstract

A process is disclosed for forming a protective metal coating on a metal surface using a flux consisting of an alkali metal fluoride, an alkaline earth metal fluoride, an alkali metal fluoaluminate, an alkali metal fluosilicate, and mixtures thereof. The flux, in particulate form, is mixed with particles of a metal coating material which may comprise aluminum, chromium, mixtures thereof, and alloys containing at least 50 wt. % aluminum and the particulate mixture is applied to the metal surface in a single step, followed by heating the coated metal surface to a temperature sufficient to cause the metal coating material to react with the metal surface to form a protective reaction product in the form of a metal coating bonded to the metal surface. The metal surface which reacts with the metal coating material to form the protective coating may comprise Fe, Co, Ni, Ti, V, Cr, Mn, Zr, Nb, Mo, Tc, Hf, Ta, W, Re and alloys thereof.

Inventors:
 [1];  [2]
  1. (Danville, CA)
  2. (Tracy, CA)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
868215
Patent Number(s):
US 5100486
Assignee:
United States of America as represented by United States (Washington, DC) LLNL
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; coating; metal; surfaces; form; protective; thereon; process; disclosed; forming; surface; flux; consisting; alkali; fluoride; alkaline; earth; fluoaluminate; fluosilicate; mixtures; particulate; mixed; particles; material; comprise; aluminum; chromium; alloys; containing; 50; wt; mixture; applied; single; step; followed; heating; coated; temperature; sufficient; react; reaction; product; bonded; reacts; mn; zr; nb; tc; hf; coating thereon; coating metal; alloys containing; single step; protective coating; coating material; metal surface; metal surfaces; alkali metal; alkaline earth; earth metal; temperature sufficient; reaction product; metal coating; particulate form; metal fluoride; particulate mixture; alloys contain; coating bonded; protective metal; coated metal; /148/427/

Citation Formats

Krikorian, Oscar H., and Curtis, Paul G. Method of coating metal surfaces to form protective metal coating thereon. United States: N. p., 1992. Web.
Krikorian, Oscar H., & Curtis, Paul G. Method of coating metal surfaces to form protective metal coating thereon. United States.
Krikorian, Oscar H., and Curtis, Paul G. Wed . "Method of coating metal surfaces to form protective metal coating thereon". United States. doi:. https://www.osti.gov/servlets/purl/868215.
@article{osti_868215,
title = {Method of coating metal surfaces to form protective metal coating thereon},
author = {Krikorian, Oscar H. and Curtis, Paul G.},
abstractNote = {A process is disclosed for forming a protective metal coating on a metal surface using a flux consisting of an alkali metal fluoride, an alkaline earth metal fluoride, an alkali metal fluoaluminate, an alkali metal fluosilicate, and mixtures thereof. The flux, in particulate form, is mixed with particles of a metal coating material which may comprise aluminum, chromium, mixtures thereof, and alloys containing at least 50 wt. % aluminum and the particulate mixture is applied to the metal surface in a single step, followed by heating the coated metal surface to a temperature sufficient to cause the metal coating material to react with the metal surface to form a protective reaction product in the form of a metal coating bonded to the metal surface. The metal surface which reacts with the metal coating material to form the protective coating may comprise Fe, Co, Ni, Ti, V, Cr, Mn, Zr, Nb, Mo, Tc, Hf, Ta, W, Re and alloys thereof.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jan 01 00:00:00 EST 1992},
month = {Wed Jan 01 00:00:00 EST 1992}
}

Patent:

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