Metal diffusion and after-treatment
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United States of America Patent
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Jul 7, 1992
Issued Date -
N/A
app pub date -
Sep 8, 1986
filing date -
Jul 8, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A nickel-base superalloy is subjected to a diffusion chromizing that supplies a chromized diffusion case, the outer surface of which contains excess alphachrome phase, and then contacting the diffusion case with an aqueous solution of alkali metal permanganate and alkali metal hydroxide until the desired amount of alphachrome phase is eliminated.
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