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Picture for 09194 Evaluation of Crevice Corrosion Resistance of Duplex and Super Duplex Stainless Steels for Sea
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09194 Evaluation of Crevice Corrosion Resistance of Duplex and Super Duplex Stainless Steels for Seawater Pumps

Product Number: 51300-09194-SG
ISBN: 09194 2009 CP
Author: Hiroshi Yakuwa, Katsuhiro Mitsuhashi, Kenichi Sugiyama and Matsuho Miyasaka
Publication Date: 2009
$20.00

The crevice corrosion resistance of duplex and super duplex stainless steels used for seawater pumps was evaluated by comparing the to results tests conducted using actual seawater  with the behavior of the stainless steels in artificial seawater
Picture for Effect of Oxygen in Back Purging Gas on Corrosion Resistance of Super Duplex Welded Joints
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Effect of Oxygen in Back Purging Gas on Corrosion Resistance of Super Duplex Welded Joints

Product Number: 51324-21111-SG
Author: Tatiana C. Almeida; Rogaciano M. Moreira; Merlin C. E. Bandeira; Oscar R. Mattos; Flávia M. F. Guedes
Publication Date: 2024
$40.00
Several offshore pipelines in Pre-salt fields, Brazil, are made of Super Duplex stainless steel. When welded, in general, these materials present a decrease in its corrosion resistance. Welding procedures, materials properties, surface conditions and post-weld treatment have influence on the resistance to local corrosion Although there is a strict control regarding the contamination of back purging gas with oxygen, sometimes, this control may fail and the oxygen content may exceed this limit. Understanding if the pitting corrosion resistance is affected by a higher oxygen level and how a post-weld surface treatment by pickling and passivation can improve the corrosion resistance is important in situations where the control of oxygen content is limited. In the present study, specimens welded with back purging gas containing 100 ppm and 200 ppm of oxygen and without back purging gas were investigated through ASTM (1) G48- A, and through ASTM G48 method E6. The pitting resistance was improved after post-weld surface treatment for super duplex stainless steel.
Picture for Failure Cases Of Super Duplex Stainless Steel Pump Components
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Failure Cases Of Super Duplex Stainless Steel Pump Components

Product Number: 51322-17689-SG
Author: Janardhan Rao Saithala, Amjad Kharusi, Mohammed Ghafri, Ossama Mohammed, Abdul Majeed, Manish Kulkarni, Talal Nabhani
Publication Date: 2022
$20.00

The application of corrosion resistance alloys such as 25% Cr super duplex stainless steel (25Cr SDSS) has expanded in the oil & gas industry recently as new technologies made it feasible for Oil and Gas operators to invest in high sour and corrosive fields. 25Cr SDSS material is often used in critical applications such as piping, rotating equipment, coolers, and instrument components etc. SDSS materials are well known for the 50/50 austenite (γ) and ferrite (α) microstructure which provides the combination of corrosion resistance and high-performance mechanical properties. 
Picture for H2S, CO2 and High Chloride Downhole Environment Modelling and Fitness for Purpose Testing of UNS S39274, UNS N08535 and UNS N06255 Corrosion Resistant Alloys
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H2S, CO2 and High Chloride Downhole Environment Modelling and Fitness for Purpose Testing of UNS S39274, UNS N08535 and UNS N06255 Corrosion Resistant Alloys

Product Number: 51324-20838-SG
Author: Noelle Easter C. Co; Ravi M. Krishnamurthy; Kenneth George; Bjørn-Andreas Hugaas; Ragnar Marcelius Fredriksen
Publication Date: 2024
$40.00
Aker BP is planning to drill four high-pressure, high-temperature wells in a gas field. The produced fluids are primarily composed of gas condensate with formation water. The operator anticipates a chloride environment greater than 120,000 mg/L in these four wells. ISO 15156 specifies a chloride limit of 120,000 mg/L for super duplex alloys for downhole applications. The objectives of this study are to determine the chemistry inside these four wells, to identify the test parameters representative of the downhole environment, and to assess if UNS S39274, UNS N08535 and UNS N06255 are suitable tubing materials. Thermodynamic modeling based on the anticipated production rate from each well was employed for the determination of downhole chemistry. Results show that chloride concentration can reach 308,000 mg/L. Scaling of halite, barite, calcite, and aragonite was also predicted to occur at certain depths inside the well. The parameters used for fitness-for-purpose testing were selected based on chloride conditions with and without halite scaling. The performance of UNS S39274, UNS N08535 and UNS N06255 was assessed using four-point bend tests, crevice corrosion tests, and slow strain rate tests in the simulated downhole environment with 0.025 bar pH2S, 16.6 bar pCO2 and high chloride concentration. No cracking was observed on UNS S39274 and UNS N06255 four-point bend specimens. However, one out of twelve UNS N08535 specimens tested exhibited a crack at a location outside the inner roller of the four-point bend jig. The corrosion rates of UNS S39274, UNS N08535, and UNS N06255 based on mass loss are 0.18 mpy, 0.23 mpy, and 0.09 mpy, respectively. Slow strain rate test results showed no significant loss in ductility, and no secondary cracking when specimens were tested in downhole high chloride conditions. The overall results of the study indicated that these corrosion resistant alloys are able to withstand chloride concentrations beyond the specified limits when H2S partial pressure is low.
Picture for Influence Of Thermomechanical Processing On Mechanical Properties And Corrosion Resistance Of Super Duplex Stainless Steel UNS S32750.
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Influence Of Thermomechanical Processing On Mechanical Properties And Corrosion Resistance Of Super Duplex Stainless Steel UNS S32750.

Product Number: 51322-17613-SG
Author: Clara Herrera, Merlin Seifert
Publication Date: 2022
$20.00

Duplex stainless steels (DSSs) are based on the Fe-Cr-Ni system and are constituted of 30 to 70 % ferrite and austenite. They combine high tensile strength, good toughness, weldability, and excellent corrosion resistance including stress-corrosion cracking and resistance to localized corrosion.1-3 DSSs can be classified according to the Pitting Resistance Equivalent Number (PREN = Cr + 3.3 Mo + 16 N) in lean duplex (PREN= 22-27), standard (PREN = 28-38), super duplex (PREN = 38-45) and hyperduplex (PREN > 45).
The Corrosion of Duplex Stainless Steels: A Practical Guide for Engineers

The Corrosion of Duplex Stainless Steels: A Practical Guide for Engineers

Product Number: 37636-POD
ISBN: 978-1-57590-369-9
Author: Roger Francos
$150.00

This is a print-on-demand (POD) book that will be produced just for you in 2-5 days after your order. It should arrive at your door in about one to two weeks. However, due to supply chain and logistic challenges currently affecting the industry, it may take longer. Allow three weeks for international orders.

In The Corrosion of Duplex Stainless Steels, author Roger Francis reviews various duplex alloy compositions, mechanical properties, and design stresses for vessels and pipes to various codes. He also covers the basics of welding duplex alloys, both to themselves and to other alloys, and their corrosion resistance.

Of most importance, the book looks at a variety of types of corrosion that may affect DSSs in service, presenting the available data and, in some cases, how to avoid problems.

2018 NACE, 256 pages, 8 x 10" trim size, color, perfect bound.

 

Corrosion of Duplex Stainless Steels

Download the free white paper summary of this title to see specific areas of focus and discussion

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