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ASM Handbook

Metallography and Microstructures

Edited by
George F. Vander Voort
George F. Vander Voort
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ASM International
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Book Chapter

Contrast Enhancement and Etching

Page range:
294 - 312
Publication history
November 01, 2004


Metallographic contrasting methods include various electrochemical, optical, and physical etching techniques, which in turn are enhanced by the formation of a thin transparent film on the specimen surface. This article primarily discusses etching in conjunction with light microscopy and describes several methods for film formation, namely, heat tinting, color etching, anodizing, potentiostatic etching, vapor deposition, and film deposition by sputtering. It provides information on the general procedures and precautions for etchants and reagents used in metallographic microetching, macroetching, electropolishing, chemical polishing, and other similar operations.

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2004. "Contrast Enhancement and Etching", Metallography and Microstructures, George F. Vander Voort

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