Menu
Search
Filters
Close
Menu

51312-01644-A new formalism to rank the pitting corrosion resistance of stainless steels depending on the actual

Picture for A new formalism to rank the pitting corrosion resistance of stainless steels depending on the actual
Available for download
Product Number: 51312-01644-SG
ISBN: 01644 2012 CP
Author: Thomas L. Ladwein
Publication Date: 2012
$0.00
$20.00
$20.00
The calculation of the PREN (pitting resistance equivalent) from the content of the alloying elements chromium molybdenum and nitrogen is a widely used formalism to rank the resistance to pitting corrosion of stainless steels. However there are other factors like mechanical and chemical surface treatments which largely influence the functional properties of the metal surfaces and thereby the corrosion resistance. These influences were evaluated in a systematic study and correlated to the critical pitting potential measured in 3 % NaCl-solution. Based on these results a new formula named PRE-S (Pitting Resistance Equivalent Surface) was developed which can be used to characterize the actual corrosion behaviour of parts according to their functional surface properties. This PRE-S formula includes the traditional PREN together with terms for surface roughness chemical treatment and air- passivation.
The calculation of the PREN (pitting resistance equivalent) from the content of the alloying elements chromium molybdenum and nitrogen is a widely used formalism to rank the resistance to pitting corrosion of stainless steels. However there are other factors like mechanical and chemical surface treatments which largely influence the functional properties of the metal surfaces and thereby the corrosion resistance. These influences were evaluated in a systematic study and correlated to the critical pitting potential measured in 3 % NaCl-solution. Based on these results a new formula named PRE-S (Pitting Resistance Equivalent Surface) was developed which can be used to characterize the actual corrosion behaviour of parts according to their functional surface properties. This PRE-S formula includes the traditional PREN together with terms for surface roughness chemical treatment and air- passivation.
Product tags
Also Purchased
Picture for Applying Direct Assessment on Segments in a Station Environment
Available for download

51312-01654-Applying Direct Assessment on Segments in a Station Environment

Product Number: 51312-01654-SG
ISBN: 01654 2012 CP
Author: Adam Ray Gardner
Publication Date: 2012
$20.00
Picture for Issues Involved in the Development of a Testing Program and Production Qualification Procedure for S
Available for download

51312-01646-Issues Involved in the Development of a Testing Program and Production Qualification Procedure for S

Product Number: 51312-01646-SG
ISBN: 01646 2012 CP
Author: Lucien Hehn
Publication Date: 2012
$20.00
Picture for CP system validation of offshore structures through modeling
Available for download

51312-01657-CP system validation of offshore structures through modeling

Product Number: 51312-01657-SG
ISBN: 01657 2012 CP
Author: Christophe Baete
Publication Date: 2012
$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