The oxidation and corrosion resistance of nitrided iron alloys

Coates, David; Mortimer, B.; Hendry, A.

doi:10.1016/0010-938x(82)90064-6

Cited by 24 publications

(7 citation statements)

References 11 publications

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“…Previous studies have discussed the influence of nitrogen on oxidation and wet corrosion of stainless steel [5,22,38,40,41]. It was reported that Cr and N co-segregate at the surface, as confirmed in the present work, which may promote the selective oxidation of metallic Cr enriched at the co-segregated surface.…”

Section: Clean Surface Characterization and Nitrogen Segregationsupporting

confidence: 74%

“…It was reported that Cr and N co-segregate at the surface, as confirmed in the present work, which may promote the selective oxidation of metallic Cr enriched at the co-segregated surface. Cr and N co-segregate in the form of chromium nitride compounds [22,40,41], which is discussed in the following.…”

Section: Clean Surface Characterization and Nitrogen Segregationmentioning

confidence: 99%

“…Nitrogen segregation has been observed in some studies performed on N-containing stainless steel [22,[38][39][40] and resulted in the formation of surface chromium nitride compounds.…”

Section: Introductionmentioning

confidence: 99%

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New insight on early oxidation stages of austenitic stainless steel from in situ XPS analysis on single-crystalline Fe–18Cr–13Ni

Wiame

Maurice

et al. 2018

Corrosion Science

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In situ X-ray photoelectron spectroscopy real-time measurements and angular-dependent high resolution core level analysis were used for the first time to investigate the Cr enrichment and oxide growth mechanisms on a model 304 austenitic stainless steel surface in the very initial stages of oxidation leading to pre-passivation. The oxidation kinetics was followed for increasing oxygen exposure and temperature, revealing an early nucleation regime (for exposure < 10 L) leading to the formation of a strongly Cr-enriched Cr 3+ /Fe 3+ mixed layer followed by an oxide growth regime where preferential iron oxidation takes over and mitigate the initial chromium enrichment.

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Section: Clean Surface Characterization and Nitrogen Segregationsupporting

confidence: 74%

Section: Clean Surface Characterization and Nitrogen Segregationmentioning

confidence: 99%

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New insight on early oxidation stages of austenitic stainless steel from in situ XPS analysis on single-crystalline Fe–18Cr–13Ni

Wiame

Maurice

et al. 2018

Corrosion Science

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“…In addition, they also observed that nitrogen remains under the oxide layer. Coates et al [65,66] studied the oxidation in air of nitrided iron alloys. Their experiments on nitrided mild steel demonstrate the resistance to fracture of oxides formed on nitrided alloys.…”

Section: 221carbonmentioning

confidence: 98%

Surface composition modification of high-carbon low-alloy steels oxidized at high temperature in air

Genève

Rouxel

Pigeat

et al. 2008

Applied Surface Science

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“…Table 1. Residual stress in Fe304 and a-Fe203 phases upon oxidizing a-Fe and dense and porous E-FeZNI-, substrates at 400°C in 0 dationstemperatur auf Raumtemperatur entstehen. Im Schrifttum werden fur die thermischen Ausdehnungskoeffizienten im Tem eraturbereich von 20-400°C fur Stahl (12,5-14)*lOPB (K-'), fur y'-Nitrid 7,6*10-6 (K-I), fur Hamatit 10,8*10-6 (K-I) und fur Magnetit (11-14)*10-6 (K-') angegeben [3 l , 321 …”

Section: Haftung Der Oxidschichten Auf Eisen Und Auf Nitrierschichtenunclassified

Oxidierende Nachbehandlung von Nitrocarburierschichten ‐ Einfluß auf die Schwingfestigkeit

Khani

1996

Materialwissenschaft Werkst

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ProbenderStahleC 15,Ck35,Ck45,34CrMo4und42CrMo4im normalisierten bzw. iin verguteten Ausgangszustand wurden salzbad-nitrocarburiert und nachfolgend in unterschiedlichen Medien (Salzwasser, 01, oxidierendes Warmbad) abgekuhlt. Die Ergebnisse der statistisch abgesicherten Umlaufbiegeuntersuchungen zeigten, daU die oxidierten Priiflinge der legierten Stahle im Vergleich zu olabgekiihlten Proben hohere Lebensdauer aufweisen. Im Falle der unlegierten Stihle wird dagegen infolge der langsamen Abkiihlung von Nitrocarburiertemperatur durch die Oxidation die Lebensdauer erniedrigt. Die oxidierende Nachbehandlung der Nitrierschichten fiihrt zur Bildung einer dichten und festhaftenden Eisenoxidschicht auf der Nitridschicht und zur Ausfullung der Poren mit Oxiden. Dadurch wird die Bestandigkeit gegen Schwingungsrifikorrosion (SwRK) signifikant erhoht. Oxidation treatment of nitrocarburized layers and its influence on fatigue strengthThis paper deals with the investigation of the fatigue strength of salt bath nitrocarburized specimens of the steels SAE 1015, SAE 1034, SAE 1042, SAE4135 and SAE4140 in a normalized or in a quenched and tempered state, and additionally cooled after nitrocarburizing in different media (salt water, oil, oxidizing salt bath). In statistically ascertained rotating bending fatigue tests the oxidized specimens of the alloyed steel showed improved fatigue lives in comparison with the oil-quenched ones. In contrast with the case of unalloyed steel the low cooling rate during the oxidizing treatment leads to a decrease in fatigue life. The results of corrosion fatigue tests with specimens of SAE4135 and SAE4140 show that the 5% NaCl environment drastically reduced fatigue life but nitrocarburizing plus oxidation treatment was found to improve the corrosion fatigue life over that of untreated specimens. The beneficial effect of nitrocarburizing followed by oxidation treatment on corrosion fatigue life results from the protection rendered by the compound layer by means of a well-sealed oxide layer, whereby the pores present in the compound layer fill up with oxides.

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The oxidation and corrosion resistance of nitrided iron alloys

Cited by 24 publications

References 11 publications

New insight on early oxidation stages of austenitic stainless steel from in situ XPS analysis on single-crystalline Fe–18Cr–13Ni

New insight on early oxidation stages of austenitic stainless steel from in situ XPS analysis on single-crystalline Fe–18Cr–13Ni

Surface composition modification of high-carbon low-alloy steels oxidized at high temperature in air

Oxidierende Nachbehandlung von Nitrocarburierschichten ‐ Einfluß auf die Schwingfestigkeit

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