A REFERENCE ELECTRODE DATA ACQUISITION SYSTEM FOR CATHODIC PROTECTION STUDIES

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Authors
  1. Lenard, D.
Corporate Authors
Esquimalt Defence Research Detachment, Victoria BC (CAN);Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
Aluminum vinyl anti-corrosive paints and impressed current cathodic protection, both of which were subjects of extensive development in Canadian defence research laboratories, have substantially increased the length of time between dockings for hull maintenance on HMC Ships. Unfortunately, at least in Canada, the transfer of cathodic protection expertise to the private sector does not appear to have been completely successful. For example, the original cathodic protection system on the DDH 280-class ships did ont provide enough protection in the stern, with resultant corrosion of rudders and A-brackets. When a new anode and reference electrode were finally placed in the stern, the initial current demand was so high that circuit breakers were blown, clearly indicating the need for additional protection in that area. Given the general lack of knowledge concerning the cathodic protection current distribution around the hull of a ship at sea and specific concerns about the systems in use on HMC Ships, the Esquimalt Defence Research Detachment initiated a research project to design and build a self-contained reference electrode data acquisition system. These electrode systems could be mounted at locations of interest around the ship hull without the need for through-hull penetrations or over-the-side cables. TRUNCATED
Report Number
DREA-SR-97-002-PAP-11 — CONTAINED IN 98-00986
Date of publication
01 Oct 1997
Number of Pages
24
DSTKIM No
98-00997
CANDIS No
507214
Format(s):
Hardcopy;Document Image stored on Optical Disk

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