Menu
Search
Filters
Close
Menu

Save 20% on select titles with code HIDDEN24 - Shop The Sale Now

00640 Galvanic Corrosion Evaluation of High Performance Naval Seawater Valve Materials in Quiescent, Natural Seawater

Picture for 00640 Galvanic Corrosion Evaluation of High
Available for download
Product Number: 51300-00640-SG
ISBN: 00640 2000 CP
Author: L.S. Marshall, D.M. Aylor and R.A. Hays
$0.00
$20.00
$20.00
High performance materials are currently being evaluated by the U.S. Navy for seawater valve applications. Of particular interest are the galvanic interactions between commercially pure titanium (CP Ti) and 90/10 copper-nickel (Cu-Ni) piping alloys and the prospective valve materials as well as the galvanic relationships between valve body and valve trim materials. Galvanic couples with area ratios representative of piping material : valve body and valve body : valve trim were immersed in quiescent, natural seawater for 180 days. Uncoupled control specimens of the valve and piping materials were also exposed. Test results indicated CP Ti piping compatibility with Ti-45Nb, CP Ti, and Ni-Cr-Mo alloys for valve body and trim. 90/10 Cu-Ni piping material was galvanically compatible with 70/30 Cu-Ni, CW6MC, or stainless alloys such as CN7M, CN3MN, or CK3MCuN for valve body application (piping : body area ratios of 10:1 or greater). For the valve trim components in the 90/10 piping system, Alloy 400, CN7M, Alloy 2507, Alloy 6XN, CP Ti, and Ni-Cr-Mo alloys are recommended. Coupling anodized CP Ti with untreated CP Ti did not result in adverse galvanic effects. Poor performance of cast alloys in the galvanic couple tests emphasized the need for optimum quality castings or utilization of similar wrought compositions to ensure good seawater performance. Keywords: galvanic corrosion, seawater, copper, copper-nickel, nickel-copper, titanium, stainless, nickel alloys
High performance materials are currently being evaluated by the U.S. Navy for seawater valve applications. Of particular interest are the galvanic interactions between commercially pure titanium (CP Ti) and 90/10 copper-nickel (Cu-Ni) piping alloys and the prospective valve materials as well as the galvanic relationships between valve body and valve trim materials. Galvanic couples with area ratios representative of piping material : valve body and valve body : valve trim were immersed in quiescent, natural seawater for 180 days. Uncoupled control specimens of the valve and piping materials were also exposed. Test results indicated CP Ti piping compatibility with Ti-45Nb, CP Ti, and Ni-Cr-Mo alloys for valve body and trim. 90/10 Cu-Ni piping material was galvanically compatible with 70/30 Cu-Ni, CW6MC, or stainless alloys such as CN7M, CN3MN, or CK3MCuN for valve body application (piping : body area ratios of 10:1 or greater). For the valve trim components in the 90/10 piping system, Alloy 400, CN7M, Alloy 2507, Alloy 6XN, CP Ti, and Ni-Cr-Mo alloys are recommended. Coupling anodized CP Ti with untreated CP Ti did not result in adverse galvanic effects. Poor performance of cast alloys in the galvanic couple tests emphasized the need for optimum quality castings or utilization of similar wrought compositions to ensure good seawater performance. Keywords: galvanic corrosion, seawater, copper, copper-nickel, nickel-copper, titanium, stainless, nickel alloys
PRICE BREAKS - The more you buy, the more you save
Quantity
1+
5+
Price
$20.00
$20.00
Product tags
Also Purchased
Picture for 07244 Mitigation of Galvanic Corrosion in Seawater Piping Systems
Available for download

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
Publication Date: 2007
$20.00

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.
Picture for 96496 HOW TO PREVENT GALVANIC CORROSION IN
Available for download

96496 HOW TO PREVENT GALVANIC CORROSION IN SEAWATER PIPING SYSTEMS

Product Number: 51300-96496-SG
ISBN: 96469 1996 CP
Author: Per Olav Gartland, Roy Johnsen, Stein Valen, Trend Rogne, John M. Drugli
$20.00
Picture for 00629 THE ADVANTAGES OF NICKEL ALLOYS FOR
Available for download

00629 THE ADVANTAGES OF NICKEL ALLOYS FOR SEAWATER SERVICE

Product Number: 51300-00629-SG
ISBN: 00629 2000 CP
Author: Edward Lo Hibner and Lewis E. Shoemaker
$20.00
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support