Use code FLASH20 at checkout for 20% off all eBooks and eCourses
Higher grade alloys such as super-duplex stainless steels have been the conventional choice when selecting corrosion resistant alloys (CRAs) for seawater or water-alternative gas (WAG) injection service. However, the use of less costly, leaner alloyed stainless steels has recently been given greater consideration in treated seawater systems where the dissolved oxygen concentration (DOC) is better controlled. Crevice corrosion exposure tests were conducted on nine (9) stainless steel alloys in synthetic seawater containing controlled DOC levels (100 ppb to 500 ppb range). The alloys ranged from a martensitic (13-Cr) stainless steel to higher alloyed duplex and super-duplex stainless steels (25-Cr). The stainless steel specimens were creviced using the CREVCORR configuration to produce tight and reproducible crevice geometries. The exposure tests were carried out in a stepwise process in which increasingly harsher test conditions (higher temperature, higher DOC) were applied after certain periods. The open circuit potentials of the specimens were monitored during the tests to indicate the onset of crevice attack as the conditions were altered. The results of this testing revealed that stainless steels containing 17-Cr or higher are not susceptible to crevice corrosion in synthetic seawater, even for dissolved oxygen levels as high as 500 ppb.
Keywords: Crevice corrosion, stainless steel, dissolved oxygen, seawater injection
We are unable to complete this action. Please try again at a later time.
If this error continues to occur, please contact AMPP Customer Support for assistance.
Use this error code for reference:
Please login to use Standards Credits*
* AMPP Members receive Standards Credits in order to redeem eligible Standards and Reports in the Store
You are not a Member.
AMPP Members enjoy many benefits, including Standards Credits which can be used to redeem eligible Standards and Reports in the Store.
You can visit the Membership Page to learn about the benefits of membership.
You have previously purchased this item.
Go to Downloadable Products in your AMPP Store profile to find this item.
You do not have sufficient Standards Credits to claim this item.
Click on 'ADD TO CART' to purchase this item.
Your Standards Credit(s)
1
Remaining Credits
0
Please review your transaction.
Click on 'REDEEM' to use your Standards Credits to claim this item.
You have successfully redeemed:
Go to Downloadable Products in your AMPP Store Profile to find and download this item.
Study to assess pitting corrosion resistance of 316L ASS (UNS S31603) and 25%Cr SDSS (UNS S32750) in salt solutions containing dissolved oxygen(DO). The DO levels examined were: 20, 50, and 100ppb, and the concentration of chloride ions were up to 152g/L Cl-, at 50 and 60°C. The results are reported herein.
This paper will present the testing results and the effect of oxygen on Austenitic Stainless Steel Grade 316L, Duplex Stainless Steel (22% Cr DSS) and Super Duplex Stainless Steel (25% Cr SDSS).