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Effect of service conditions on the corrosion of nickel-aluminum bronze and copper-nickels alloys in seawater
RISE - Research Institutes of Sweden, Materials and Production, KIMAB. (Institut de la Corrosion)
DGA, France.
RISE - Research Institutes of Sweden, Materials and Production, KIMAB. (Institut de la Corrosion)
KME Germany GmbH and Co. KG, Germany.
2019 (English)In: NACE - International Corrosion Conference SeriesVolume 2019-March, 2019, Article number 13337Corrosion Conference and Expo 2019; Nashville; United States; 24 March 2019 through 28 March 2019;, National Assoc. of Corrosion Engineers International , 2019Conference paper, Published paper (Refereed)
Abstract [en]

Nickel-Aluminum Bronze (NAB) and Copper-Nickel alloys (CuNi) are commonly used in seawater environments due to their strength combined with a good corrosion resistance and a high resistance to biofouling. However, localized corrosion failures have been reported and are often attributed to abnormal service conditions. The effect of several service condition parameters on the localized corrosion of NAB (UNS C63000, CuAl10Ni5Fe4) and CuNi alloys 90/10 (UNS C70600) and 70/30 (UNS C71500) have been investigated in natural seawater. The results are compared with that of Aluminum-brass (UNS C68700). It includes flow conditions (flowing, quiescent and stagnant), chlorination, sulphide pollution, and crevice geometries. Exposures in both indoor (laboratory) and outdoor tanks (conditions promoting macro fouling) have been tested in temperate and in tropical seawaters. The corrosion stability of the protective oxide layer of the tested copper-based alloys was mainly affected by sulphide pollution in aerated seawater (general corrosion). Under the tested conditions, localized corrosion under-biodeposit clearly appeared as the critical failure for the tested alloys. The conditions for which biodeposit appeared critical for copper-nickel alloys was investigated. 

Place, publisher, year, edition, pages
National Assoc. of Corrosion Engineers International , 2019.
Keywords [en]
Aluminum-brass, Biofouling corrosion, Copper-nickel alloys, Nickel-Aluminum Bronze, Seawater corrosion, Aluminum copper alloys, Aluminum corrosion, Biofouling, Brass, Bronze, Corrosion protection, Corrosion resistance, Corrosion resistant alloys, Iron alloys, Localized corrosion, Nickel alloys, Pollution, Pollution induced corrosion, Sulfur compounds, Aluminum brass, Copper based alloys, Copper nickel alloys, Corrosion stability, Nickel aluminum bronzes, Protective oxide layers, Seawater environment, Service conditions, Copper corrosion
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-39996Scopus ID: 2-s2.0-85070113527OAI: oai:DiVA.org:ri-39996DiVA, id: diva2:1361633
Conference
NACE - International Corrosion Conference Series Volume 2019-March, 2019, Article number 13337 Corrosion Conference and Expo 2019; Nashville; United States; 24 March 2019 through 28 March 2019;
Available from: 2019-10-16 Created: 2019-10-16 Last updated: 2019-10-17Bibliographically approved

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