Corrosion Problems with Copper-Nickel Components in Sea Water Systems

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Authors
  1. Lenard, D.R.
  2. Welland, R.R.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
Recent changes in construction techniques and operational practice have resulted in a number of failures of copper-nickel components in sea water sytems. These failures include erosion corrosion of welded 90/10 copper-nickel pipe, erosion corrosion of 90/10 copper-nickel heat exchanger tubes, "hot-spot" corrosion of 70/30 copper-nickel tubes and denickelification of 70/30 copper-nickel tubes. Case histories describing examples of each of these problems are presented. Factors contributing to these failures, such as welds protruding into the flow stream, tight bends, contamination by marine organisms, unusual flow patterns and exposure to sulfide-polluted, stagnant sea water, are discussed. Methods to prevent or reduce the future occurrence of these problems are also presented.
Report Number
DREA-SR-1999-162-PAP-16 — CONTAINED IN CA000150
Date of publication
01 Oct 1999
Number of Pages
17
DSTKIM No
CA000166
CANDIS No
511890
Format(s):
Hardcopy;Document Image stored on Optical Disk

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