Properties of Nitrogen-Containing Stainless Alloy Designed for High Resistance to Pitting

Bandy, R.; Rooyen, D. van

doi:10.5006/1.3581995

Cited by 52 publications

(21 citation statements)

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“…This synergistic effect has been reported. [17][18][19][20][21] Olsson 17) suggested that the synergistic effect of duplex stainless steels was due to stabilization of the passive film by the interaction of molybdates and ammonium ions.…”

Section: Resultsmentioning

confidence: 99%

Localized Corrosion Behavior of High Nitrogen-bearing Austenitic Stainless Steels in Seawater Environment

2003

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Crevice corrosion behavior of high nitrogen-bearing stainless steels with up to 1.1 mass% nitrogen were investigated in artificial seawater. Specimens were highly purified and contained ultra-high nitrogen of about 1 mass% obtained by using nitrogen gas pressurized electroslag remelting (P-ESR) system. 23%Cr-4%Ni-0 to 2%Mo-0.7 to 1.1%N stainless steels were used as test specimens. Crevice corrosion resistant properties of the stainless steels were evaluated by means of electrochemical corrosion test method using multiple crevice assemblies. Crevice corrosion was confirmed by visual observation to be generated after test and by in-situ current response under test. It was seen that there was a positive correlation between nitrogen content and crevice corrosion potential. High nitrogen-bearing austenitic stainless steels produced by P-ESR had good crevice corrosion resistance. It was also found that ultra-high nitrogen stainless steels containing molybdenum had superior crevice corrosion resistance. Surface of high nitrogen stainless steel was analyzed using X-ray photoelectron spectroscopy (XPS). After polarization at the passive potential region (at ϩ300 mV vs. SCE), an alloying nitrogen or nitride peak of N1s spectra appeared at higher take-off angle measurement, indicating that nitrogen concentrated at the inner layer of the interface between passive film and bulk metal. Enriched nitrogen at the interface may be possible to improve crevice corrosion resistance.

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Section: Resultsmentioning

confidence: 99%

Localized Corrosion Behavior of High Nitrogen-bearing Austenitic Stainless Steels in Seawater Environment

2003

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“…Although rather extreme (in contrast to the expected) environmental conditions are needed to reveal localized corrosion tendencies of the candidate materials, recent publications (Bandy and van Rooyen, 1985) indicate that nitrogen additions to stainless steel and nickelbase materials combat localized corrosion. These additions are also beneficial in increasing the resistance to sensitization, and they combat forms of corrosion associated with that phenomenon.…”

Section: Activities To Determine Transgranular Stress Corrosion Crackmentioning

confidence: 99%

Progress report on the results of testing advanced conceptual design metal barrier materials under relevant environmental conditions for a tuff repository

McCright¹,

Halsey²,

Konynenburg³

1987

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“…[1][2][3][4][5][6] Compared to other additives such as chromium or molybdenum, a minute nitrogen content is effective in improving resistance to localized corrosion. Moreover, nitrogen addition helps to refine the microstructure and increase the strength of the material, and it can be used instead of nickel as an austeniteforming element.…”

Section: Introductionmentioning

confidence: 99%

Effect of Nitrogen on Crevice Corrosion and Repassivation Behavior of Austenitic Stainless Steel

Baba

Katada

2008

Mater. Trans.

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Austenitic stainless steels were produced based on a Fe-23 mass%Cr-4 mass%Ni alloy with varying nitrogen (0.7-1 mass%) and molybdenum contents (0-1 mass%), through electro-slag remelting (ESR) under high nitrogen gas pressure. The effects of nitrogen on crevice corrosion behavior in an acidic chloride solution were investigated, and the passive film of the crevice corrosion area after corrosion tests was analyzed using X-ray photoelectron spectroscopy (XPS). At the same time, the effects of nitrogen on the passivation behaviors after scratching were also investigated. During crevice corrosion at a noble potential of 0.7 V (SCE), the nitrogen in solid solution in the steel dissolves into the solution as NO 3 À , and its concentration increases with the nitrogen content in the steel. It was also established that the number of corrosion spots, the corrosion loss, and the maximum depth of corrosion all decrease with the increase in the nitrogen content present in the steel and the applied potential. Such results can be attributed to the presence of NO 3 À dissolved into the aqueous solution. On the other hand, results from scratch tests show that the increase in the amount of added nitrogen decreases the peak value of passivation current as well as the amount of electricity during repassivation, suggesting that nitrogen stimulates the passivation process and suppresses the occurrence of crevice corrosion. XPS analysis shows the presence of nitrogen as nitrides and NH 3 in the surface layer of crevice corrosion and the internal layer of passivation films.

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Properties of Nitrogen-Containing Stainless Alloy Designed for High Resistance to Pitting

Cited by 52 publications

References 0 publications

Localized Corrosion Behavior of High Nitrogen-bearing Austenitic Stainless Steels in Seawater Environment

Localized Corrosion Behavior of High Nitrogen-bearing Austenitic Stainless Steels in Seawater Environment

Progress report on the results of testing advanced conceptual design metal barrier materials under relevant environmental conditions for a tuff repository

Effect of Nitrogen on Crevice Corrosion and Repassivation Behavior of Austenitic Stainless Steel

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