Server maintenance is scheduled for Saturday, December 21st between 6am-10am CST.

During that time, parts of our website will be affected until maintenance is completed. Thank you for your patience.

Menu
Search
Filters
Close
Menu

51318-11092-Electrochemical corrosion comparison of seamless tubes in UNS S31266 and UNS S31254

Picture for Electrochemical corrosion comparison of seamless tubes in UNS S31266 and UNS S31254
Available for download

Critical pitting temperature (CPT) for UNS S31266 was compared to UNS S31254 with the newly developed electrochemical method, modified ASTMG150 developed by K. Lund et al., using 3M magnesium chloride (MgCl2) instead of 1M sodium chloride (NaCl).

Product Number: 51318-11092-SG
Author: Amelie Eriksson / Katarina Persson / Kristina Lund
Publication Date: 2018
Industry: Science of Corrosion
$0.00
$20.00
$20.00

The super-austenitic stainless steel UNS S31266 is due to its optimum of alloying elements a suitable material for seawater applications as for example seawater cooled heat exchangers. Producing UNS S31266 as seamless tubes gives the possibility to build heat exchangers with both tubes and plates in UNS S31266. The super-austenitic stainless steel UNS S31254 also has excellent corrosion resistance in a variety of industrial environments.

In this study the critical pitting temperature (CPT) for UNS S31266 was compared to UNS S31254 with the newly developed electrochemical method, modified ASTMG150 developed by K. Lund et al., using 3M magnesium chloride (MgCl2) instead of 1M sodium chloride (NaCl). CPT-values measured by the modified ASTM G150-method were shown to be 10-20 °C lower than when using 1M NaCl. Also, the crevice corrosion resistance of UNS S31266 was compared to UNS S31254 measured in NaCl solution.

The average CPTmod in 3M MgCl2 for UNS S31266 was 86 °C and for UNS S31254 it was 66 °C. The CPTmod was thus 20 °C higher for the UNS S31266 seamless tubes compared to UNS S31254. The CCT in NaCl of UNS S31266 was approximately 85 °C and for UNS S31254 it was approximately 60 °C.

Key words: Heat exchanger, super-austenitic stainless steel, seawater, pitting corrosion, crevice corrosion, UNS S31266, UNS S31254

 c

The super-austenitic stainless steel UNS S31266 is due to its optimum of alloying elements a suitable material for seawater applications as for example seawater cooled heat exchangers. Producing UNS S31266 as seamless tubes gives the possibility to build heat exchangers with both tubes and plates in UNS S31266. The super-austenitic stainless steel UNS S31254 also has excellent corrosion resistance in a variety of industrial environments.

In this study the critical pitting temperature (CPT) for UNS S31266 was compared to UNS S31254 with the newly developed electrochemical method, modified ASTMG150 developed by K. Lund et al., using 3M magnesium chloride (MgCl2) instead of 1M sodium chloride (NaCl). CPT-values measured by the modified ASTM G150-method were shown to be 10-20 °C lower than when using 1M NaCl. Also, the crevice corrosion resistance of UNS S31266 was compared to UNS S31254 measured in NaCl solution.

The average CPTmod in 3M MgCl2 for UNS S31266 was 86 °C and for UNS S31254 it was 66 °C. The CPTmod was thus 20 °C higher for the UNS S31266 seamless tubes compared to UNS S31254. The CCT in NaCl of UNS S31266 was approximately 85 °C and for UNS S31254 it was approximately 60 °C.

Key words: Heat exchanger, super-austenitic stainless steel, seawater, pitting corrosion, crevice corrosion, UNS S31266, UNS S31254

 c

Product tags
Also Purchased
Picture for 51318-11098- Microbial Assisted Cracking of Admiralty Brass Tubes from Lube Oil Cooler
Available for download

51318-11098- Microbial Assisted Cracking of Admiralty Brass Tubes from Lube Oil Cooler

Product Number: 51318-11098-SG
Author: Yousif Al Rabie / Khalid Al-Nabulsi / Faisal Al-Abbas
Publication Date: 2018
$20.00

This work investigates unexpected leaks observed on several cracked admiralty brass tubes that failed after 7 years in operation. Both metallurgical and molecular microbiological methods were used to understand the root cause of these failures.
Picture for The Application Limitation Boundary of Duplex Stainless Steel under Sour Condition in Oil Fields
Available for download

51318-11084-The Application Limitation Boundary of Duplex Stainless Steel under Sour Condition in Oil Fields

Product Number: 51318-11084-SG
Author: Ziru Zhang / Zhu Wang / Junpeng Xue / Lei Zhang / Xian Tang / Minxu Lu
Publication Date: 2018
$20.00

Pitting failure boundary of duplex stainless steel under sour condition was investigated by electrochemical and immersion tests. Polarization measurements investigate the effect of temperature and H2S on the corrosion behavior.
Picture for Influence of tungsten on passivity breakdown and repassivation of 25Cr super duplex stainless steels
Available for download

51318-11102-Influence of tungsten on passivity breakdown and repassivation of 25Cr super duplex stainless steels

Product Number: 51318-11102-SG
Author: Cristian Torres / Mariano Kappes / Roy Johnsen / Mariano Iannuzzi
Publication Date: 2018
$20.00

Two super duplex stainless steels were investigated: a W-free (UNS S32750) and a 2.1 wt% W-containing (UNS S39274) grade. Goals: To study localized corrosion resistance of super duplex stainless steels and how W affects the same.
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