METHOD OF TREATING AN ARTICLE
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United States of America Patent
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Jan 10, 2023
Grant Date -
Jun 1, 2023
app pub date -
Mar 11, 2022
filing date -
Mar 11, 2022
priority date (Note) -
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Abstract
An embodiment of the invention describes a method of treating an article to improve its corrosion resistance. The method includes the step of nitriding the article in a cyanide-free nitriding bath to obtain a nitrided article, heating the nitrided article in an atmosphere having nitrogen and carbon-carburizing to obtain a nitrided oxidised article. Further, in certain embodiments, the oxidised nitrided article may be coated with a metallic layer. The oxidised nitrided article with the metallic coating has improved corrosion resistance.
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