The corrosion tendency of copper-nickel alloys in sulfide polluted seawater was investigated under simulated jet impingement conditions. It was found that under high jet impingement velocity the corrosion of these copper-nickel alloys decreases with increasing sulfide concentration. A new mechanism is proposed to explain this unexpected behavior. This behavior was attributed to the sweeping away of corrosive agents with increasing jet velocity. In addition it was found that complexing agents such as Erichrome Black-T (EBT) can render sulfide to be more aggressive and enhance the corrosion tendency. This mechanism supports the experimental results. It can concluded that at high jet velocity and long exposure time sulfide ions alone are not as deleterious as has been previously conceived.

Subject
Ions, Corrosion rate, Inspection, Corrosion reactions, Seawater, Sulfide concentration, Film formation, Jet impingement, Copper nickel alloys, Sulfides, Copper, Alloys, Corrosion potential
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1994
Association for Materials Protection and Performance (AMPP)
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