Accession Number : ADA336754

Title :   Lead Corrosion in Exhibition Ship Models

Descriptive Note : Technical rept.

Corporate Author : NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD

Personal Author(s) : Wegner, Dana

PDF Url : ADA336754

Report Date : NOV 1997

Pagination or Media Count : 29

Abstract : Lead has been a popular metal for fabricating fittings for exhibition ship models. It has been attractive because it is easy to obtain, soft and easy to fashion, and it melts at a relatively low temperature. However, lead fittings frequently corrode. Corrosion may be so severe as to completely consume the piece, leaving behind a white or gray residue popularly, and aptly, called "lead disease," "lead rot," "lead cancer," or "lead bloom." In the exhibition ship modeling community there has been considerable speculation about what causes lead to severely corrode, how to arrest the process in pieces already installed, and how to prevent corrosion in the future. This report compiles some of the technical literature on the subject and relates that literature, in practical terms, to ship modelers and to museum staff who are unable to obtain the advice and services of objects conservators. Organic compounds are the chief category of substances acting harshly upon lead and acetic acid is among the most destructive of these compounds.

Descriptors :   *CORROSION, *SHIP MODELS, *LEAD(METAL), LOW TEMPERATURE, HAZARDS, MELTS, REDUCTION, COATINGS, ORGANIC COMPOUNDS, PARTS, MUSEUMS, FITTINGS, CARBONATES, ACETIC ACID.

Subject Categories : Inorganic Chemistry
      Organic Chemistry
      Properties of Metals and Alloys
      Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE