Accession Number : ADA133113

Title :   The Role of Microorganisms in Marine Corrosion Processes.

Descriptive Note : Annual technical rept. no. 2, 1 Jul 82-30 Jun 83,

Corporate Author : HARVARD UNIV CAMBRIDGE MA LAB OF MICROBIAL ECOLOGY

Personal Author(s) : Mitchell,Ralph ; Walch,Marianne ; Tomei,Francisco

PDF Url : ADA133113

Report Date : Apr 1983

Pagination or Media Count : 46

Abstract : This report describes research into the role of bacteria in marine corrison processes. During the past year we have studied four aspects of biological corrison; the mechanisms of attachment of bacteria involved in corrison to metal surfaces, corrison by extremely thermophillic bacteria, anaberobic corrison proceses, and hydrogen embrittlement. Both quantitative and qualitative differences in the attachment microflora were detected on different metal surfaces. Hydrophobicity of the bacteria appears to control specificity of attachment. Extremely thermophillc bacteria appaer to be common on surfaces in contact with hot water. Bacteria are well known as catalysts in anaerobic corrison processes. Bacteria appear to play an important role in hydrogen embrittlement of metals. Bacteria capable of producing large quantities of bacteria are found in microbial biofilms on metal surfaces.

Descriptors :   *Microorganisms, *Biodeterioration, *Corrosion, *Bacteria, Anaerobic processes, Marine biology, Hydrogen embrittlement, Metals, Surfaces, Attachment, Hydrophobic properties, Hot water, Catalysts, Films

Subject Categories : Microbiology
      Biological Oceanography
      Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE