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Sulfate Formation During Corrosion of Copper Alloy Objects

Published online by Cambridge University Press:  28 February 2011

Michael B. McNeil  and
D. W. Mohr
Michael B. McNeil
Affiliation:
Office of Nuclear Regulatory Research, Nuclear Regulatory Commission, Washington, DC 20555
D. W. Mohr
Affiliation:
Naval Coastal Systems Center, Panama City, Florida 32407-5000
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Abstract

The copper sulfate minerals chalcanthite (CuSO4.5H20), antlerite (Cu3SO4(OH)4), and brochantite (Cu4SO4(OH)6) are observed as corrosion products on copper alloy objects such as statues which are exposed to weathering. The usual product in aqueous corrosion is brochantite, though posnjakite (Cu4SO4(OH)6H20) is also known. No copper sulfate mineral is commonly found in artifacts recovered from near-surface burial. These observations can be explained in terms of stability diagrams and microbiological activity.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 267: Symposium J – Materials Issues in Art and Archaeology III , 1992 , 1047
Copyright
Copyright © Materials Research Society 1992

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