Accession Number:

ADA191844

Title:

An Investigation of Microbiologically Mediated Corrosion of Copper-Nickel Piping Systems Selectively Treated with Ferrous Sulfate

Descriptive Note:

Journal article

Corporate Author:

NAVAL OCEAN RESEARCH AND DEVELOPMENT ACTIVITY STENNIS SPACE CENTER MS

Report Date:

1987-01-01

Pagination or Media Count:

6.0

Abstract:

Microbiologically induced corrosion in 9010 Cu-Ni pipes was evaluated using estuarine water from the Gulf of Mexico at the mouth of the Pascagoula River, maintained at a flow rate of 3-6 ftsec over an 8-month period. The impact of surface preparation, batch FeSO4 50 ppb Fe2 for 48 hours pretreatment and intermittent treatment was evaluated. Surface deposits were characterized by scanning electron microscopy and energy-dispersive x-ray fluorescence spectrometry. Water analyses included pH, dissolved oxygen, dissolved sulfide and sulfate, total organic carbon, total suspended solids and dissolved heavy metal analyses, as well as quantification of bacteriological components. Batch FeSO4 treatment did not result in a persistent increase in surface-bound iron or decreased localized corrosion. Surface pitting appeared to be associated with accumulations of chlorine, sulfur, and microbiological colonization.

Subject Categories:

  • Microbiology
  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE