 |
Wednesday, March 19, 2008 - 9:30 AM
Convention Center, Second Level, R09 (Ernest N. Morial Convention Center)
08231
Effect of Seawater Chlorination on the Erosion Corrosion Behaviour of Copper-Nickel Alloy CuNi 90/10
Over several decades, many thousand tonnes of the copper-alloy CuNi90/10 (UNS C70600) have been installed on different marine engineering structures, mainly as piping for seawater handling and heat exchangers. In spite of the macro fouling resistance of this material, the seawater is often chlorinated. As there is only limited information available about the effect of chlorination on the corrosion behaviour of copper-nickel, a systematic approach is needed to understand the effect of free chlorine. The results of the first part of this project, which was presented during Eurocorr’2006, demonstrated that up to 5 ppm free chlorine do not affect the corrosion behaviour of fresh and pre-exposed samples. The results of the second part presented in this paper evaluate the effect of flow on the corrosion behaviour of fresh and pre-exposed CuNi90/10 samples. Testing involved evaluation of the effect of chlorination on critical shear stresses using the rotating cage and submersed jet impingement. The onset of localized attack due to jet impingement was monitored by electrochemical noise measurements using the CoulCount-diagnostics. The data is being used to validate the current practical service recommendations.
See more of Marine Corrosion & Transport - Session 1
See more of Technical Symposium
See more of The CORROSION 2008 Conference and Expo (March 16-20, 2008)
See more of Technical Symposium
See more of The CORROSION 2008 Conference and Expo (March 16-20, 2008)