PULSED EDDY CURRENT THICKNESS MEASUREMENT OF SELECTIVE PHASE CORROSION ON NICKEL ALUMINUM BRONZE VALVES

Journal Article · Mon Feb 22 00:00:00 EST 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3362422· OSTI ID:21371028

Krause, T W; Harlley, D; Babbar, V K; Wannamaker, K ^[1]

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1. Department of Physics, Royal Military College of Canada, Kingston, ON, K7K 7B4 (Canada)

Nickel Aluminum Bronze (NAB) is a material with marine environment applications that under certain conditions can undergo selective phase corrosion (SPC). SPC involves the removal of minority elements while leaving behind a copper matrix. Pulsed eddy current (PEC) was evaluated for determination of SPC thickness on a NAB valve section with access from the surface corroded side. A primarily linear response of PEC amplitude, up to the maximum available SPC thickness of 4 mm was observed. The combination of reduced conductivity and permeability in the SPC phase relative to the base NAB was used to explain the observed sensitivity of PEC to SPC thickness variations.

• OSTI ID: 21371028
• Journal Information: AIP Conference Proceedings, Vol. 1211, Issue 1; Conference: Review of progress in quantitative nondestructive evaluation, Kingston, RI (United States), 26-31 Jul 2009; Other Information: DOI: 10.1063/1.3362422; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
BRONZE
COPPER
CORROSION
EDDY CURRENTS
ELECTRIC CONDUCTIVITY
NICKEL ALLOYS
PERMEABILITY
SCANNING ELECTRON MICROSCOPY
SENSITIVITY
SURFACES
THICKNESS
VALVES
VARIATIONS
ALLOYS
CHEMICAL REACTIONS
CONTROL EQUIPMENT
COPPER ALLOYS
COPPER BASE ALLOYS
CURRENTS
DIMENSIONS
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELECTRON MICROSCOPY
ELEMENTS
EQUIPMENT
FLOW REGULATORS
METALS
MICROSCOPY
PHYSICAL PROPERTIES
TIN ALLOYS
TRANSITION ELEMENT ALLOYS
TRANSITION ELEMENTS