Metal treatment
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United States of America Patent
Stats
-
Jan 26, 1993
Issued Date -
N/A
app pub date -
Jun 6, 1990
filing date -
Jul 28, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Diffusion coating can be speeded by high heat input. Diffusion coating packs can be made with chemically reduced metal content of sludges. Diffusion aluminizing followed by caustic leaching to remove much of the diffused-in aluminum, yields catalytically and pyrophorically active porous surface that also accepts top coatings. Mixtures of aluminum powder with nickel and/or iron powders react when heated to form Raney-like product that can be leached to become pyrophoric, and when held on a metal foil or gauze web will adhere to the web so that leached product can be used as pyrophoric foil for decoying heat-seeking missiles. Such adhesion is improved by addition of small amount of copper.
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