Tafel-analysis of the AP-CITROX decontamination technology of Inconel alloy 690

Katona, Richárd; Rivonkar, Aditya; Locskai, R.; Bátor, Gergő; Abdelouas, A.; Somlai, J.; Kovács, Tibor

doi:10.1016/j.apradiso.2021.110073

Cited by 2 publications

(3 citation statements)

References 19 publications

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“…As shown in Fig. 2, with the increase of NaCl concentration, the self-corrosion potential increases, indicating that the corrosion resistance of 321 stainless steel will gradually decrease with the increase of NaCl concentration [7]. And the corrosion current density shows a trend of increasing rst, then decreasing.…”

Section: Tafel Curve ( Tafel )mentioning

confidence: 88%

Study of corrosion behavior of 321 stainless steel in NaCl solution

Li,

Wang,

Zhang

et al. 2023

Preprint

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321 stainless steel has high room temperature strength and oxidation resistance. It is investigated that the corrosion resistance of 321 stainless steel in hydrochloric acid solutions containing different concentrations of NaCl in the research. The alloy is mainly composed of austenitic stainless steel. The results of electrochemical tests were analyzed, and it was confirmed that NaCl could promote the corrosion of 321 stainless steel, but the corrosion would be suppressed to a certain extent when the NaCl concentration reached 0.10 mol/L. The research results can provide a reference for the corrosion resistance improvement research of 321 stainless steel.

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Section: Tafel Curve ( Tafel )mentioning

confidence: 88%

Study of corrosion behavior of 321 stainless steel in NaCl solution

Li,

Wang,

Zhang

et al. 2023

Preprint

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“…The samples were oxidised using the setup shown in Figure 1. The setup used in this work was adapted from D. Horvath (Horvath, 2017) and R. Katona (Katona et al, 2022). The metal samples were inductively heated up to high temperature (600-800 °C) and vapours of distilled water/boric acid solutions were passed over it for 8 h. The concentrations of boric acid (ACS reagent, ≥ 99.5%, Merck) solutions were 1 g/L and 15 g/L.…”

Section: Preparation Of Surrogate Steel Samplesmentioning

confidence: 99%

“…Likewise, 3 different concentrations for oxalic acid (dihydrate, ACS reagent, ≥95.0%, Alfa Aesar) were used, 5, 10, and 18.5 mM, respectively. Additional oxalic acid was added, for destruction of the potassium permanganate and any MnO 2 Illustration of laboratory set-up to oxidize metal samples [adapted from (Horvath, 2017) and (Katona et al, 2022)].…”

Section: Treatment Of Metallic Samplesmentioning

confidence: 99%

Optimisation of the chemical oxidation reduction process (CORD) on surrogate stainless steel in regards to its efficiency and secondary wastes

Rivonkar¹,

Katona²,

Robin³

et al. 2022

Front. Nucl. Eng.

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Nuclear Power is a decarbonated technology of electrical energy generation. Using nuclear energy as a power source is currently considered as the best option in the fight against climate change. But the radioactive waste generated from nuclear power plants and their related facilities are matter of concern. Though the high level and intermediate level activity wastes are contained in small volumes (≤10%), significant volumes of lower activity wastes are generated. Metallic wastes are a major component of these radioactive wastes with about 500,000 tons expected in France alone, including 130,000 tons from steam generators. Majority of these metals are made of Stainless steel 316 alloy or Inconel 600. Under the effect of the primary circuit thermal-hydraulic constraints and irradiation, these the resulting corrosion products may be activated when close to the fuel, and be transported throughout the circuit. These products can be deposited on the surface of other metal components, causing contamination of the latter. The contamination can be adsorbed on the surface but can also diffuse in the oxide layers and sub-surface. The oxide layer is composed of an inner layer of Cr oxide under a layer of Ni and Fe oxide. Chemical decontamination is preferred due to the possibility of decontamination of difficult geometries and tube bends. In order to decontaminate these materials, it is important to dissolve the oxide layers chemically and a few micrometers of base metal where it could have diffused. An existing chemical method used to treat these materials is studied in this article, Chemical Oxidation Reduction Decontamination (CORD). Surrogate steel samples were prepared using high temperature induction heating and water vapour after sample preparation and cleaning. The oxide layer was characterised before treatment of the samples in the batch method at different concentrations and its effects are observed on the dissolution of the oxide layers. A protocol is being developed for the treatment of secondary waste effluents by multi-stage precipitation with a goal to reduce the total waste volumes and thus the volumes of ion exchange resins that would otherwise be needed.

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Tafel-analysis of the AP-CITROX decontamination technology of Inconel alloy 690

Cited by 2 publications

References 19 publications

Study of corrosion behavior of 321 stainless steel in NaCl solution

Study of corrosion behavior of 321 stainless steel in NaCl solution

Optimisation of the chemical oxidation reduction process (CORD) on surrogate stainless steel in regards to its efficiency and secondary wastes

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