Use code FLASH20 at checkout for 20% off all eBooks and eCourses
UNS S209101, also known as XM-19 by ASTM A2762, is a nitrogen-strengthened austenitic stainless steel with high strength and excellent corrosion resistance. Besides nitrogen (N) it also contains higher amounts of chromium (Cr), nickel (Ni), manganese (Mn), and a similar molybdenum (Mo) content compared with UNS S31603, as well as small additions of niobium (Nb) and vanadium (V). High contents of Cr, Mo and N confer this stainless steel high localized corrosion resistance. Mo, Mn and Cr increase the nitrogen solubility in iron alloys.
UNS S20910 (XM-19) is an austenitic stainless steel with excellent corrosion resistance and high strength due to its high nitrogen content. In solution annealed condition, it exhibits better corrosion resistance than UNS S31603 and UNS S31703 while having approximately twice their yield strength at room temperature (> 345 MPa (50 ksi)). The tensile strength of UNS S20910 can be further increased by cold-working, which makes the material more versatile. This paper discusses the influence of strain hardening on the mechanical and corrosion properties of UNS S20910. The corrosion behavior was studied in terms of intergranular corrosion resistance, pitting corrosion and stress corrosion cracking susceptibility in chloride-containing solutions at different temperatures. UNS S20910 in strain hardened condition presents a fully austenitic microstructure with niobium-rich primary precipitates and Z-phase, a complex nitride. In addition, the material shows a yield strength and ultimate tensile strength higher than 890 MPa (129 ksi) and 1035 MPa (150 ksi), respectively, as well as an elongation above 20 %, and impact energy higher than 100 J (74 ft-lbs). Strain hardened material did not exhibit any sensitization; therefore, it retained its excellent pitting corrosion resistance in chloride-containing solutions, which decreases with increasing temperature, though. The material has also shown good resistance to stress corrosion cracking in brines at elevated temperature. It was confirmed that the strain-hardening process increases tensile strength without significantly affecting the corrosion properties of this stainless steel. Therefore, strain hardened UNS S20910 can be used in applications involving very aggressive environments where also high strength, good ductility and non-magnetic properties are required.
Corrosion in Mooring systems for permanently moored floating production units has been identified as a problem area by authorities as well as industry. A Joint Industry Project (JIP) initiated by the Bureau of Safety and Environmental Enforcement (BSEE) with participation from major global oil and gas operators as well as equipment suppliers was established in 2014 to review the problem area. 1 Studies performed as a part of this program have shown that especially mooring chains located in tropical waters have shown signs of rapid corrosion, both general and localized with corrosion rates significantly larger than those specified in design standards. Increased corrosion allowance, as well as increased inspection requirements, have been recommended and corrosion has been reported as the leading cause for pre-emptive replacement of mooring.
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.
An emerging market driver in industrial water treatment is the move to more sustainable chemistries. Corporate sustainability goals are becoming more common and more stringent. Customers are turning to water treatment companies for innovative solutions that can satisfy their sustainability goals and not sacrifice performance or asset integrity. Indeed, a major trend in evaporative open cooling water treatment is to move away from heavy metals such as zinc and other environmentally questionable materials such as phosphates. Another area of cooling water that is in need of a sustainability refresh is closed cooling loops. The most widespread closed cooling treatment programs are based on combinations of nitrite, molybdate, and borate. All three of these chemicals have regulatory, discharge and/or SH&E concerns.
Only a few researchers have studied the effect of carbon fiber repair on corrosion processes. The main protective effect is the "protective barrier" which is sometimes called passive protection against corrosion, comparable to some techniques such as anticorrosion coatings of concrete structures. Indeed, CFRP materials, applied as external reinforcing material on reinforced concrete structures form a protective barrier against the penetration of moisture and pollutants such as chlorides or carbon dioxide.1.2.3.4.5 Apart from this impermeable barrier action, it has been found in these studies that the confinement of CFRP concrete has a positive influence on the onset of corrosion and on its velocity. Very little research has investigated the coupling between mechanical reinforcement and impressed current system.6,7,8