The conflicting roles of complexing agents on the corrosion of copper-nickel alloys in sulfide polluted seawater
- Kuwait Univ., Safat (Kuwait)
Five copper-nickel alloys with nickel contents ranging from 0 weight percent (w/o) to 100 w/o were electrochemically investigated in sulfide pollute seawater (0 to 100 ppm S[sup =]). In addition a chromium modified copper-nickel alloy (CDA 722) was also investigated. The purpose of this research is to investigate the effect of both the nickel content and the sulfide ion concentration under a simulated impingement condition. It is found that CDA 722 performs as well as CDA 715 and better than CDA 706 under impingement conditions in both polluted and unpolluted seawater. In addition, three different complexing agents were investigated. It is found that fuchsin or EDTA can have a beneficial effect in reducing the corrosion rate and a combination of two complex agents can result in a deleterious effect which can explain the premature failures of copper-nickel alloys often reported in the literature.
- OSTI ID:
- 7006244
- Journal Information:
- Journal of the Electrochemical Society; (United States), Journal Name: Journal of the Electrochemical Society; (United States) Vol. 141:6; ISSN JESOAN; ISSN 0013-4651
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360105* -- Metals & Alloys-- Corrosion & Erosion
42 ENGINEERING
423000 -- Engineering-- Marine Engineering-- (1980-)
ALLOYS
CHALCOGENIDES
CHEMICAL REACTIONS
CHROMIUM ADDITIONS
CHROMIUM ALLOYS
COPPER ALLOYS
CORROSION
CORROSION INHIBITORS
CORROSIVE EFFECTS
DATA
ELECTROCHEMICAL CORROSION
EXPERIMENTAL DATA
HYDROGEN COMPOUNDS
INFORMATION
NICKEL ALLOYS
NUMERICAL DATA
OXYGEN COMPOUNDS
SEAWATER
SULFIDES
SULFUR COMPOUNDS
UNDERWATER FACILITIES
WATER