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Metallography of Precious Metals

Preparation of Precious Metals

For 18-karat gold alloys, and similar highly noble precious metals: it is necessary to use an attack-polish agent in the MasterPrep alumina abrasive step. Mix 10 mL of the attack-polish solution with 50 mL of MasterPrep alumina slurry. The attack-polish agent can be: H2O2 (30% conc.), or aqueous 5-20% CrO3, or aqueous 10% oxalic acid, etc.


The articles and presentations that can be down-loaded from this web site are based upon work done by GFV while employed at Bethlehem Steel (1967-1983), Carpenter Technology (1983-1996), Buehler Ltd. (1996-2009) and Struers (2009-Present) and from the authors consulting work for companies such as, Latrobe Steel, Scot Forge, etc., and from his litigation work. GFV's bylined articles appearing in various issues of the ASM Handbook series have been listed here courtesy of ASM International, Materials Park, Ohio.