The Corrosion Behavior of Copper-Based Materials Exposed to Natural Seawater
Annual technical rept. 1 Sep 1989-31 Aug 1990
NAVAL OCEANOGRAPHIC AND ATMOSPHERIC RESEARCH LAB STENNIS SPACE CENTER MS
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The corrosion behavior of Cu, Cu-Ni alloys, Admiralty Brass and A1 Bronze has been studied as a function of exposure time to natural seawater at the Naval Civil Engineering Laboratory in Port Huenema, California. Samples were exposed at the open-circuit potential Bcorr and at - 850 mV vs SCE. The properties of the biofilms and rhe calcareous deposits were examined as a function of exposure time with electrochemical impedance spectroacopy MIS and SEMEDAX. Comparisons will be made with the results for the stainless steels 304, 316, A16X, and Ti grade 2 which have been exposed under identical conditions. The effects of mana transport have been studied with a rotating cylinder electrode in laboratory experiments and in natural seawater. Current data were collected as a function of rotation spread at Bcorr, at - 850 mV Va SCE and at an anodic potential. Comparisons were made with the results for stainless steel 304 and Ti grade 2 which showed different effects of mass transport on the electrochemical reactions which determine the corrosion behavior of these materials.
- Physical and Dynamic Oceanography
- Properties of Metals and Alloys