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Nondestructive Characterization of Corrosion Protective Coatings on Aluminum Alloy Substrates

: Hoffmann, J.; Sathish, S.; Khobaib, M.; Meyendorf, N.; Netzelmann, U.; Matikas, T.

Baaklini, G.Y.; Meyendorf, N.; Matikas, T.; Gilmore, R. ; Materials Research Society -MRS-:
Nondestructive Methods for Materials Characterization
Pittsburgh, Pa.: MRS, 2000 (Materials Research Society symposia proceedings 591)
ISBN: 1-55899-499-8
Symposium "Nondestructive Methods for Materials Characterization" <1999, Boston/Mass.>
Conference Paper
Fraunhofer IZFP ()
corrosion; aluminium; coating; nondestructive testing

This paper describes the initial phase of the development of a nondestructive, multisensor approach for detecting, quantifying and monitoring degradation of organic coatings applied ot aluminum surfaces. Descriptions of the purposes and chemical composition of layered coatings used on aircraft structures are provided. The discussion then concentrates on ultrasonic thickness measurements. One is the well-established pulse/echo scanning acoustic microscopy and, as a proposed alternative, contiuous acoustic waves measurements with a probe in contact to the sample. Advantages and disadvantages of the two methods and their potential as in field applications are discussed.