Process for treating the surface of a component, made from a Ni based superalloy, to be coated
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United States of America Patent
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Aug 27, 2002
Grant Date -
N/A
app pub date -
Aug 4, 2000
filing date -
Aug 9, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for treating the surface of a component prior to coating. The component is made from a Ni based superalloy designed for high temperature service. Both the component and the coating include the elements Al and/or Cr. The process includes depleting the outer surface of the component of any one or a combination of Al, Ti or Cr and thereafter applying the coating directly on the depleted surface. The process minimizes the formation of a brittle gamma prime phase within the interdiffusion zone during service of the component. The process can also be used to renew old damaged coatings.
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