Coating processes – With post-treatment of coating or coating material – Coating material recirculation or regeneration
Patent
1974-11-01
1977-01-11
Kendall, Ralph S.
Coating processes
With post-treatment of coating or coating material
Coating material recirculation or regeneration
427352, 427242, 427205, 427436, 427429, 29198, 291912, C23C 1700
Patent
active
040027821
ABSTRACT:
The process of providing protective coatings of refractory metals and alloys on to any metallic base such as: iron, aluminum, chromium, cobalt, copper, nickel, magnesium, tin, titanium, or on to any metallic alloy base such as: steels, cast irons, brasses, bronzes, and solders at temperatures as low as ambient or below, including selecting an electrolyte material capable of dissociation into ions, such that at 25.degree. C the equivalent conductance of 0.1 normal solution of electrolyte divided by that of the electrolyte solution at infinite dilution is between 0.13 and 0.93, providing a particulate refractory metal having a melting point of at least 1490.degree. C, to be deposited within the near-surface region of the base metal, admixing 99 to 50 percent by weight of said refractory metal and 1 to 50 percent by weight of said electrolyte, the refractory metal having a nascent surface capable of producing ions in solution, ionizing said refractory metal to a concentration of about 1 to 20,000 mg. of refractory metal per liter of solution, and at least partially surrounding said refractory metal with said electrolyte, contacting and at least partially coating the base metal with the refractory metal and the electrolyte admixture, reacting the electrolyte in the admixture with the base metal at temperatures between 0.degree. C and 200.degree. C, and depositing discrete particles that may be randomly distributed or may appear as agglomerates forming a coating of said refractory metal within the near-surface region of the base metal, whereby to provide a protective surface for the base metal.
REFERENCES:
patent: 2640002 (1953-05-01), Clayton
patent: 3328197 (1967-06-01), Simon
Warner Joshua B.
Wolf James S.
Keegan Francis A.
Kendall Ralph S.
Warner-London
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