Crevice corrosion resistance of nickel-based alloys (MAT21 and Hastelloy C-22), a stainless steel (SUS3 16L) and a titanium based alloy (Ti-0.15 Pd) was evaluated in hot concentrated chloride ion solutions that simulate the operating environment in a plant that extracts salt from seawater. Electrochemical measurements showed the possibility of crevice corrosion on all materials teste in hot and highly concentrated simulated seawater solutions in the open air. In additin, the prevention of crevice corrosion on materials in the brine process of the salt extracting plant could be essentially achieved by decreasing the amount of dissolved oxygen rather than slightly decreasing the temperature and the chloride ion concentratin. Cathodic protection of Hastelloy C-22 by contact with Monel was very effective for the preventin of crevice corrosion.
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