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99314 DEALLOYING OF CUPRONICKELS IN STAGNANT SEAWATER

Picture for 99314 DEALLOYING OF CUPRONICKELS IN STAGNANT
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Product Number: 51300-99314-SG
ISBN: 99314 1999 CP
Author: D.R. Lenard, J.R. Martin and R.H. Heidersbach
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This report discusses the dealloying (denickelification) of 70-30 cupronickel (UNS C 71500) heat exchanger tubing in stagnant seawater. Heat exchanger tubing from a naval vessel exposed to stagnant seawater was examined. The results include metallographic, scanning electron microscope, and X-ray spectrographic analyses supporting the conclusion that the dealloying occurred by a dissolution followed by redeposition of copper process. Keywords: cupronickel, dealloying, denickelification, corrosion, marine corrosion, saltwater corrosion, heat exchanger, scanning electron microscope (SEM)
This report discusses the dealloying (denickelification) of 70-30 cupronickel (UNS C 71500) heat exchanger tubing in stagnant seawater. Heat exchanger tubing from a naval vessel exposed to stagnant seawater was examined. The results include metallographic, scanning electron microscope, and X-ray spectrographic analyses supporting the conclusion that the dealloying occurred by a dissolution followed by redeposition of copper process. Keywords: cupronickel, dealloying, denickelification, corrosion, marine corrosion, saltwater corrosion, heat exchanger, scanning electron microscope (SEM)
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07244 Mitigation of Galvanic Corrosion in Seawater Piping Systems

Product Number: 51300-07244-SG
ISBN: 07244 2007 CP
Author: Brett M. Tossey and John A. Beavers
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Results of laboratory testing of a new technology for mitigating galvanic corrosion. Incorporated into a device, referred to as the galvanic corrosion inhibiting coupling (GCIC) or bi-electrode device (BED), it creates an ohmic potential drop within the pipe and minimizes the polarization of the dissimilar metals.
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03260 CORROSION OF CUPRONICKEL TUBES IN ARABIAN GULF SEAWATER SERVICE

Product Number: 51300-03260-SG
ISBN: 03260 2003 CP
Author: O.A. Ashiru, A.A. Al-Refaie, A.K. Bairamov
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Picture for 11351 The Corrosion of Superduplex Stainless Steel in Different Types of Seawater
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11351 The Corrosion of Superduplex Stainless Steel in Different Types of Seawater

Product Number: 51300-11351-SG
ISBN: 2011 11351 CP
Author: R Francis, G Byrne and G Warburton
Publication Date: 2011
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Superduplex stainless steels have been used in seawater systems since 1986 as castings and since 1990 as wrought product. The present paper describes some of the service environments commonly in use and the conditions that give rise to specific operating potentials. The limits of use under these conditions are described utilizing both laboratory and service experience.
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