Process for increasing the corrosion resistance of nitrided structural parts made of iron material
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United States of America Patent
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-
Sep 29, 1981
Grant Date -
N/A
app pub date -
Aug 13, 1980
filing date -
Aug 23, 1979
priority date (Note) -
Expired
status (Latency Note)
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Abstract
To increase the corrosion resistance of nitrided structural parts made of iron materials which are useful for all types of iron and steel there is carried out an oxidation treatment in connection with the nitriding process. The oxidation treatment is carried out for 15 to 50 minutes in an oxidizing salt bath. The salt bath preferably consists of alkali hydroxides with 2 to 20% of alkali nitrates.
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