Characterization of Corrosion Products on Cupronickel 70:30 Alloy in Sulfide-Polluted Seawater
- 1 February 1986
- journal article
- Published by Association for Materials Protection and Performance (AMPP) in Corrosion
- Vol. 42 (2) , 113-117
- https://doi.org/10.5006/1.3584884
Abstract
The intermittent occurrence of dissolved sulfide in seawater up to a level of 100 ppb was observed when seawater was flowing in an experimental setup through copper alloy tubes at 0.16 m/s for varying time periods from 1 to 12 months. As with other copper alloys, the sulfide attack on cupronickel 70:30 (Fe) was observed and analyzed. The attack on cupronickel 70:30 (Fe) tube led to the formation of voluminous corrosion products in distinct layers that consisted of Cu2S, Cu2O, CuCl2⋅3Cu(OH)2⋅3H2O, 2CuCl2⋅Cu(OH)2, (Ni, Fe)3 S4, and NiCl2, with simultaneous dealloying of the tube surface.Keywords
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