Electromagnetic probe testing of bond coat
AssigneeMitsubishi Power Americas, Inc.
InventorEarnest W. Hamilton
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Abstract
A method for measuring a non-magnetic coating thickness upon a non-magnetic gas turbine component, such as a hot gas path component, can comprise applying a magnetic coating, such as a ferrous coating, upon the non-magnetic gas turbine component, applying a non-magnetic coating, such as a metallic bond coating, upon the magnetic coating, and measuring a thickness of the non-magnetic coating with a magnetic induction probe. The magnetic induction probe can be calibrated to the magnetic coating before the non-magnetic coating is applied. Measuring of the thickness of the non-magnetic coating can be used to validate spray patterns of automated spray processes. The magnetic and non-magnetic coatings can be stripped from the gas turbine component and used to validate additional spray patterns.
Claims20
A method for measuring a non-magnetic coating thickness upon a non-magnetic gas turbine component, the method comprising:
- applying a magnetic coating upon the non-magnetic gas turbine component;
- applying a non-magnetic coating upon the magnetic coating;
- and
- measuring a thickness of the non-magnetic coating with a magnetic induction probe.
A method of inspecting a coating thickness of a gas turbine component, the method comprising:
- mounting the gas turbine component in a fixture;
- coating the gas turbine component with a ferrous coating;
- and
- validating the ferrous coating with a testing tool;
- wherein
- the gas turbine component comprises a non-magnetic, gas path component;
- and
- the testing tool comprises a magnetic induction probe.
A method of inspecting a coating thickness of a gas turbine component, the method comprising:
- mounting the gas turbine component in a fixture;
- coating the gas turbine component with a ferrous coating;
- validating the ferrous coating with a testing tool;
- stripping the gas turbine component of the ferrous coating;
- and
- reusing the gas turbine component to validate another spray process.
Dependencies are inferred from the claim text.