Metallurgical features in as-cast, aluminum alloy, sacrificial anodes, such as the casting grain size, have been found to vary somewhat dramatically in recent procurements from different vendors. There appears to be a linkage between the casting grain size and the electrochemical performance efficiency. This study documents the physical metallurgy features and electrochemical performance of castings prepared by several techniques over a range of temperatures, and includes information regarding casting cooling rates and heat treatments for grain growth.

Subject
Grain size, Test methods, Materials, Galvanic anodes, Metal surfaces, Anode surfaces, Procurement, Polarization curves, Indium, Zinc, Aluminum alloys, Grain, Anodes
Keywords:
Sacrificial anodes, indium activated aluminum anodes, casting grain size, anode efficiency, electrochemical testing
Government work published by the Association for Materials Protection and Performance (AMPP) with permission of the author(s). Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
1999
GOV
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