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11351 The Corrosion of Superduplex Stainless Steel in Different Types of Seawater

Picture for 11351 The Corrosion of Superduplex Stainless Steel in Different Types of Seawater
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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.

Product Number: 51300-11351-SG
ISBN: 2011 11351 CP
Author: R Francis, G Byrne and G Warburton
Publication Date: 2011
Industries: Maritime , Materials Selection and Design
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$20.00
$20.00

Superduplex stainless steels have been used in seawater systems since 1986 as castings and since 1990 as wrought product. The performance has generally been excellent with few problems. However, seawater is a complex medium and, depending on the redox potential, stainless steels can adopt a wide range of potentials, spanning over a volt. Different methods of operation can lead to service potentials right across this range and the limits of use of superduplex stainless steel vary according to the potential. They cover the range from stagnant deaerated conditions, where the risk of microbially influenced corrosion is high, to chlorinated, flowing seawater, where the risk of crevice corrosion is high. 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. The results show the ability of superduplex stainless steel to tolerate a wide range of marine service environments without suffering localised corrosion.

Keywords: seawater, crevice corrosion, stainless steels, desalination, MIC

Superduplex stainless steels have been used in seawater systems since 1986 as castings and since 1990 as wrought product. The performance has generally been excellent with few problems. However, seawater is a complex medium and, depending on the redox potential, stainless steels can adopt a wide range of potentials, spanning over a volt. Different methods of operation can lead to service potentials right across this range and the limits of use of superduplex stainless steel vary according to the potential. They cover the range from stagnant deaerated conditions, where the risk of microbially influenced corrosion is high, to chlorinated, flowing seawater, where the risk of crevice corrosion is high. 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. The results show the ability of superduplex stainless steel to tolerate a wide range of marine service environments without suffering localised corrosion.

Keywords: seawater, crevice corrosion, stainless steels, desalination, MIC

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Product Number: 51315-5446-SG
ISBN: 5446 2015 CP
Author: Roger Francis
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Available cast austenitic and duplex stainless steel grades and their castability and corrosion resistance. The conclusion is that superduplex stainless steel offers the best combination of properties for seawater cooling and firewater pumps.

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09194 Evaluation of Crevice Corrosion Resistance of Duplex and Super Duplex Stainless Steels for Seawater Pumps

Product Number: 51300-09194-SG
ISBN: 09194 2009 CP
Author: Hiroshi Yakuwa, Katsuhiro Mitsuhashi, Kenichi Sugiyama and Matsuho Miyasaka
Publication Date: 2009
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The crevice corrosion resistance of duplex and super duplex stainless steels used for seawater pumps was evaluated by comparing the to results tests conducted using actual seawater  with the behavior of the stainless steels in artificial seawater
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03255 EXPERIENCES WITH SUPERDUPLEX STAINLESS STEEL IN SEAWATER

Product Number: 51300-03255-SG
ISBN: 03255 2003 CP
Author: R FRANCIS, G BYRNE
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