Accession Number:

ADA070677

Title:

Galvanic Corrosion of Piping and Fitting Alloys in Sulfide-Modified Seawater

Descriptive Note:

Research and development rept.

Corporate Author:

DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER ANNAPOLIS MD SHIP MATERIALS ENGINEERING DEPT

Personal Author(s):

Report Date:

1979-05-01

Pagination or Media Count:

31.0

Abstract:

Two wrought piping alloys, 70-30 and 90-10 copper-nickel, were each galvanically coupled to each of four fitting alloys in sulfide-modified seawater for 30 days. The fitting alloys used were bronze Composition M, cast Monel, wrought nickel-aluminum bronze, and cast 70-30 copper-nickel. The piping materialfitting material area ratio was 31, and the seawater velocity was 2.4 meters per second. Results indicated that the galvanic relationship between M- bronze or Monel and 70-30 copper-nickel is affected by sulfide additions in a manner that increases the corrosion of the fitting material, whereas similar couples with 90-10 copper-nickel show little effect of sulfide.

Subject Categories:

  • Physical Chemistry
  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE