USS Princeton (CG 59): Impact of Marine Macrofouling (Mussels and Hydroids) on Failures/Corrosion Problems in Seawater Piping Systems
NAVAL OCEANOGRAPHIC AND ATMOSPHERIC RESEARCH LAB STENNIS SPACE CENTER MS
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The presentation summarized some of the information that will be released as NAVSWC TR 90-176 on macrofouling problems within the seawater piping system of the USS PRINCETON CG 59 and its contribution to the failures corrosion problems observed. Some sections of NAVSWC TR 90-176 appeared in NAVSSES 10310-1 March 1990. The macrofouling problems were due to the marine mussel Mytilus edulis and hydroids. Serpulids were also observed but to a lesser degree than mussels and hydroids. Due to the observed failurescorrosion problems and the extent of the macrofouling in the seawater piping systems, an environmentally safe, thermal steam control method for the macrofouling was recommended. Biological systems respond very strongly to temperature. Marine organisms, possibly as a result of the relative stability of their natural environment, are extremely sensitive to temperature fluctuations. Relatively small increases in temperature cause significant mortality in Mytilus edlius and efforts to use thermal control to inhibit Mytilus have been successful as reported in the literature. The following temperature-time requirements have been established for total kill of Mytilus 106 F for 1 hour, 95 F for 7 hours, 82 F for 4 days and 77 F was completely ineffective for all durations evaluated. There is also a synergistic effect of chlorine with heat treatment.
- Water Pollution and Control