Growth Process of Passive Films on Austenitic Stainless Steels under Wet-dry Cyclic Condition

Jung, Rockhoon; Tsuchiya, Hiroaki; Fujimoto, Shinji

doi:10.2355/isijinternational.52.1356

Cited by 9 publications

(2 citation statements)

References 29 publications

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“…Cr enrichment has been found in the passive layer during the first stages of exposure to a wet-dry cycling process, which the deposition and then drying of a CaSO 4 solution may mimic. 37 As such, the passive layer present for the 2 μL droplets may well be of a composition more resistant to corrosion than that present for the 4 μL tests, where there was no pre-deposition of an aqueous solution before the deposition of chloride.…”

Section: Discussionmentioning

confidence: 99%

Effect of Nitrate and Sulfate on Atmospheric Corrosion of 304L and 316L Stainless Steels

Cook

Padovani

Davenport

2017

J. Electrochem. Soc.

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The effects of nitrate and sulfate salts on the chloride-induced atmospheric pitting corrosion of 304L and 316L stainless steel was investigated through automated deposition of droplets of magnesium and calcium salts. Nitrate was found to inhibit pitting under magnesium salt droplets when the ratio between the deposition density of nitrate anions and chloride anions was above a critical value, which was the same for both 304L and 316L. This critical ratio was found to decrease with increasing humidity. Sulfate was also observed to inhibit pitting for MgCl 2 + MgSO 4 mixtures, but only at higher humidities. Sulfate did not show any inhibition for CaCl 2 + CaSO 4 mixtures, an effect attributed to the low solubility of CaSO 4 . At low relative humidities, precipitation of the inhibiting salt was observed, leading in some cases to crevice-like corrosion under salt crystals. The pitting behavior was explained in terms of the thermodynamic behavior of concentrated solutions. In the UK, stainless steel is used to package intermediate level radioactive waste, ILW, which is characterized by relatively large volumes and variable levels of radioactivity.1 Whatever the strategic approach to its management c , most ILW has been packaged in thinwalled containers (2.3-6 mm thick, typically grades 304L or 316L, UNS S304003 and UNS S316003, respectively) and will undergo long periods of exposure to atmospheric conditions, either in surface or underground facilities prior to permanent disposal.During these periods, waste containers will be exposed to regimes of varying temperature and relative humidity (RH), as well as to chloride-containing salts arising from aerosol deposition. As a result, it is important to identify suitable storage conditions to ensure durability of waste containers, in particular to avoid conditions associated with the development of pitting and, even more importantly, atmospherically-induced stress corrosion cracking (AISCC). 2,3Monitoring of ILW storage facilities and other indoor locations considered broadly representative of ILW stores suggests that temperature and relative humidity, which are key parameters in the development of atmospheric corrosion, are expected to vary between ∼0-30• C and ∼30-100% RH, respectively. 3 Ionic chemical species deposited on surfaces after relatively long periods of indoor storage found in swab tests in a variety of real storage facilities include calcium, magnesium, sodium, potassium, chloride, nitrate and sulfate ions. Inside the storage buildings surveyed, chloride deposition densities were found to be below ∼20 μg/cm 2 , with deposition rates of the order of 1 μg/cm 2 per year estimated. 3 With such a deposition rate, the chloride deposition density could increase to ∼100 μg/cm 2 over the next century.In atmospheric conditions relevant to this work, a number of tests have been carried out to evaluate the atmospheric pitting corrosion of stainless steel in the presence of chloride deposits (e.g., Refs. 2, 4-6) but none of these have been carried out in the presence of...

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Section: Discussionmentioning

confidence: 99%

Effect of Nitrate and Sulfate on Atmospheric Corrosion of 304L and 316L Stainless Steels

Cook

Padovani

Davenport

2017

J. Electrochem. Soc.

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“…Fe(0) 706.9 ± 0.2 [36,37] Fe(II) oxide 709.6 ± 0.2 [36,38] Fe(III) oxide 710.5 ± 0.2 [36,38] Cr(0) 574 ± 0.2 [36,37] Cr oxide 576.3 ± 0.2 [36,37] Ni(0) 852.9 ± 0.2 [37,39] Ni(II) oxide 855.5 ± 0.2 [37,39] Abbreviation: XPS, X-ray photoelectron spectroscope.…”

Section: Compounds Binding Energy (Ev) Referencesmentioning

confidence: 99%

Corrosion behavior of HR3C austenitic stainless steel in supercritical water near the critical point

Chen

Zhang

Luo

et al. 2023

Materials & Corrosion

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The corrosion behavior of HR3C stainless steel was investigated in supercritical water near the critical point. Results show that HR3C steel displays an unusual weight change behavior. Traditional weight gain behavior is detected in the initial corrosion stage because of the formation of spinel oxide scale and crater‐like Nb‐rich oxides. The detaching of crater‐like Nb‐rich oxides results in weight loss behavior during the middle corrosion stage. After 1200 h exposure, the diffusion‐controlled growth of outer Fe2O3 particles leads to the reoccurring of weight gain behavior. The formation of crater‐like Nb‐rich oxides is closely associated with the primary Z‐phase precipitates.

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Influence of Different Ultraviolet Radiation Intensities on the Corrosion Behavior of Type 316 Stainless Steel in a Simulated Salt-Lake Atmospheric Environment

Guo

Feng

Tariq

et al. 2022

J. of Materi Eng and Perform

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Growth Process of Passive Films on Austenitic Stainless Steels under Wet-dry Cyclic Condition

Cited by 9 publications

References 29 publications

Effect of Nitrate and Sulfate on Atmospheric Corrosion of 304L and 316L Stainless Steels

Effect of Nitrate and Sulfate on Atmospheric Corrosion of 304L and 316L Stainless Steels

Corrosion behavior of HR3C austenitic stainless steel in supercritical water near the critical point

Influence of Different Ultraviolet Radiation Intensities on the Corrosion Behavior of Type 316 Stainless Steel in a Simulated Salt-Lake Atmospheric Environment

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