An insight into the passivation of cupronickel alloys in chloride environment |
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| Authors: | J Mathiyarasu N Palaniswamy and V S Muralidharan |
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| Institution: | (1) Corrosion Science and Engineering Division, Central Electrochemical Research Institute, 630 006 Karaikudi, India |
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| Abstract: | Cupronickels offer enhanced corrosion protection in marine environments by the formation of passive films on the surface.
Cyclic voltammetric studies were carried on cupronickels in chloride solutions at pH 6.3 to understand the role of chloride
ions in passive film formation. Increase in nickel content of the alloy and of chloride ions in solution decreases film resistance.
Chloride ions take part in reduction of the passive film to copper. A solid-state model for passive film formation involving
chloride ions has been attempted. |
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| Keywords: | Cupronickels passivation solid-state model cyclic voltammetry marine environment |
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