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1. (WO2010122287) OXIDATION STATE SENSORS AND METHODS FOR TRANSITION METAL ALLOYS

Pub. No.:    WO/2010/122287    International Application No.:    PCT/GB2010/000769
Publication Date: Fri Oct 29 01:59:59 CEST 2010 International Filing Date: Sat Apr 17 01:59:59 CEST 2010
IPC: G01N 17/00
G01N 31/22
G01N 21/64
Applicants: ROLLS-ROYCE PLC
CLARK, Daniel
BURROWS, Justin
Inventors: CLARK, Daniel
BURROWS, Justin
Title: OXIDATION STATE SENSORS AND METHODS FOR TRANSITION METAL ALLOYS
Abstract:
The present invention is concerned with a method of discriminating between, in a surface of a transition metal alloy, transition metals in different oxidation states using surface sensor molecules adapted to associate selectively with one of the transition metals. In particular, the present invention provides a method of identifying degradation in aircraft components such as turbine blades, engine casings and aerofoils. In embodiments, a surface sensor molecule comprising an oxidation state discriminating group, such as an imidazole, and a fluorescein probe is applied in aqueous solution to the surface of a service-run Ni alloy aircraft component. The sensor molecule selectively associates with transition metals in oxidation states greater than zero such that fluorescence imaging can be used to identify areas of degradation.