Menu
Search
Filters
Close
Menu

06305 LONG-TERM ENNOBLEMENT STUDIES ON NI-CR-MO ALLOYS

Picture for 06305 LONG-TERM ENNOBLEMENT STUDIES
Available for download
Product Number: 51300-06305-SG
ISBN: 06305 2006 CP
Author: F. J. Martin, E. J. Lemieux, W. E. O’Grady, P. M. Natishan
$0.00
$20.00
$20.00
The present work demonstrates that seawater corrosion potential ennoblement can persist during long-term immersion exposures for several corrosion resistant Ni-Cr-Mo alloys. The present study considers the implications of long-term and short-term seawater ennoblement on Alloy 625 (UNS N06625), Alloy 276 (UNS N10276), Alloy 59 (UNS N06059), Alloy 2000 (UNS N06200), and Alloy 686 (UNS N06686). When compared to freshly exposed specimens not influenced by ennoblement biofilms, seawater ennoblement of Ni-Cr-Mo alloys are shown to increase the seawater cathodic current capacity of such alloys at potentials more positive than –400mV, but show a diminshed oxygen reduction capacity at potentials below this threshold. The work also explores the ability of seawater ennoblement biofilms to respond to changing cathodic demand. The degree of cathodic current adaptation is lower for mature ennoblement biofilms than for ennoblement biofilms formed on freshly exposed specimens, although the increase in cathodic current capacity – the cathodic current density available to drive galvanic corrosion – is not insignificant for long-term specimens.

Keywords: seawater, corrosion potential ennoblement, nickel alloys, crevice corrosion, cathodic current capacity
The present work demonstrates that seawater corrosion potential ennoblement can persist during long-term immersion exposures for several corrosion resistant Ni-Cr-Mo alloys. The present study considers the implications of long-term and short-term seawater ennoblement on Alloy 625 (UNS N06625), Alloy 276 (UNS N10276), Alloy 59 (UNS N06059), Alloy 2000 (UNS N06200), and Alloy 686 (UNS N06686). When compared to freshly exposed specimens not influenced by ennoblement biofilms, seawater ennoblement of Ni-Cr-Mo alloys are shown to increase the seawater cathodic current capacity of such alloys at potentials more positive than –400mV, but show a diminshed oxygen reduction capacity at potentials below this threshold. The work also explores the ability of seawater ennoblement biofilms to respond to changing cathodic demand. The degree of cathodic current adaptation is lower for mature ennoblement biofilms than for ennoblement biofilms formed on freshly exposed specimens, although the increase in cathodic current capacity – the cathodic current density available to drive galvanic corrosion – is not insignificant for long-term specimens.

Keywords: seawater, corrosion potential ennoblement, nickel alloys, crevice corrosion, cathodic current capacity
PRICE BREAKS - The more you buy, the more you save
Quantity
1+
5+
Price
$20.00
$20.00
Product tags
Also Purchased
Picture for 06253 Acoustic Leak Survey of the Underground
Available for download

06253 Acoustic Leak Survey of the Underground Potable Water System at a CONUS Army Installation

Product Number: 51300-06253-SG
ISBN: 06253 2006 CP
Author: Sean Morefield, Vince Hock, John Carlyle
$20.00
Picture for 06264 SILVER SULFIDE CORROSION CONTROL
Available for download

06264 SILVER SULFIDE CORROSION CONTROL USING CORROSION PREVENTION COMPOUNDS

Product Number: 51300-06264-SG
ISBN: 06264 2006 CP
Author: Barry S. Hindin
$20.00
Picture for 06289 Evaluation of Descaling Chemicals for Use
Available for download

06289 Evaluation of Descaling Chemicals for Use with Titanium, Alloy 625, and Nickel Copper Alloy Heat Exchanger and Piping System Components

Product Number: 51300-06289-SG
ISBN: 06289 2006 CP
Author: Edward J. Lemieux, Robert Bayles, Theresa M. Newbauer, Keith E. Lucas
$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