Improved Surface Morphology and Corrosion Resistance Performance of 2205 Duplex Stainless Steel by Low Temperature Gas Nitriding

Dan, Nsikan Etim; Hussain, Patthi; Shaik, Nagoor Basha; Bakthavatchalam, Balaji; Mohapatra, Ranjan K.; Behera, Ajit

doi:10.1007/s40735-022-00698-6

Cited by 3 publications

(1 citation statement)

References 34 publications

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“…The researchers found that heat exchanger tubes made of Grade 2205 duplex stainless steel did not fail under the same operating conditions [17]. Dan et al improved the toughness and corrosion resistance of 2205 duplex steel by investigating the inhibition of brittle intermetallic compounds by low-temperature nitriding [18]. Deen et al observed the failure of a 316L plate heat exchanger due to pitting corrosion, which they attributed to the breakdown of the passive oxide film caused by high chloride levels in the cooling water [19].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Causes and Protective Measures against Corrosion Perforation in the Shell-Side Outlet Flange of a Sour Water Steam Heater

Liang,

Duan,

2024

Coatings

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Heat exchangers, as essential devices for facilitating heat transfer, have found a variety applications in various industries. However, the occurrence of corrosion-related failures in real-world scenarios remains a prevalent problem that can lead to catastrophic incidents. This paper investigates the problem of corrosion perforation on the outlet flange of a heat exchanger in a sour steam stripper from a petrochemical company. Failure analysis was performed using physical testing and chemical analysis, metallographic examination, microscopic observation, and energy spectrum analysis. Intergranular corrosion experiments and flow calculations were performed to verify the analysis. The results indicate that the main cause of the flange corrosion perforation was the formation of a highly concentrated NH4HS aqueous solution during the cooling process of the NH3, H2S, and water vapor in the fluid passing through the heat exchanger, and the velocity was too high, which triggered alkali-sour water washout corrosion. To prevent the recurrence of similar corrosion perforations, recommendations for material and process optimization are proposed to effectively reduce the safety production risks in refinery units and provide valuable information for the safe long-term operation of a sour steam stripper.

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Section: Introductionmentioning

confidence: 99%

Analysis of Causes and Protective Measures against Corrosion Perforation in the Shell-Side Outlet Flange of a Sour Water Steam Heater

Liang,

Duan,

2024

Coatings

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Analysis of coated samples containing hydroxyapatite/multiwalled carbon nanotubes on 2205 DSS substrate

Albaraqaawee,

Abdulsada,

Al-Mosawi

2024

Fullerenes, Nanotubes and Carbon Nanostructures

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The Expanded Phases Formed in Stainless Steels by Means of Low-Temperature Thermochemical Treatments: A Corrosion Perspective

Borgioli

2024

Metals

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Surface engineering of stainless steels using thermochemical treatments at low temperatures has been the subject of intensive research for enhancing the surface hardness of these alloys without impairing their corrosion resistance. By using treatment media rich in nitrogen and/or carbon, it is possible to inhibit chromium compound formation and obtain supersaturated solid solutions, known as expanded phases, such as expanded austenite or S-phase in austenitic stainless steels, expanded ferrite in ferritic grades, and expanded martensite in martensitic grades. These low-temperature treatments produce a significant increase in surface hardness, which improves wear and fatigue resistance. However, the corrosion behavior of the modified surface layers remains of paramount importance. In the international literature, many studies on this topic are reported, but the results are not always univocal, and there are still open questions. In this review, the corrosion behavior of the expanded phases and the modified layers in which they are present is critically analyzed and discussed. The relationships between the phase composition and the microstructure of the modified layers and the corrosion resistance are highlighted while also considering the different test conditions. Furthermore, corrosion test methods are discussed, and suggestions are given for improving the measurements. Finally, perspectives on future directions for investigation are suggested for encouraging further research.

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Improved Surface Morphology and Corrosion Resistance Performance of 2205 Duplex Stainless Steel by Low Temperature Gas Nitriding

Cited by 3 publications

References 34 publications

Analysis of Causes and Protective Measures against Corrosion Perforation in the Shell-Side Outlet Flange of a Sour Water Steam Heater

Analysis of Causes and Protective Measures against Corrosion Perforation in the Shell-Side Outlet Flange of a Sour Water Steam Heater

Analysis of coated samples containing hydroxyapatite/multiwalled carbon nanotubes on 2205 DSS substrate

The Expanded Phases Formed in Stainless Steels by Means of Low-Temperature Thermochemical Treatments: A Corrosion Perspective

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