Corrosion behavior of austenitic steels and their components in niobium-containing chloride melts

Abramov, A. V.; Polovov, Ilya B.; Rebrin, O. I.; Volkovich, Vladimir A.; Lisienko, D. G.

doi:10.1134/s0036029514020025

Cited by 5 publications

(7 citation statements)

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“…Typical distribution of elements near grain boundaries of AISI 321 stainless steel samples after 30 h exposure to NaCl-KCl-VCl 2 melt at 750 0 C is presented in Figure 6. The obtained results confirm the conclusion about chromium depletion at the grain boundaries as a result of sensitization (carbide formation) during high temperature exposure (24). The thickness of depleted zone for AISI 321 equals to 1.5 μm, 0.8 μm for AISI 316Ti, and 1.0 μm for AISI 316L.…”

Section: Corrosion Of Austenitic Steels In Nacl-kcl-vcl 2 Meltssupporting

confidence: 86%

“…The results of measuring the average weight decrease and the corrosion rate of different steel samples in NaCl-KCl-VCl 2 melt are shown in Figures 2 and 3. At short exposure times the character of the kinetic curves is close to the observed earlier in NaCl-KCl (24). The increase of corrosion test period to 20 h leads to slight decrease of corrosion resistance apparently due to possible spalling of steel grains.…”

Section: Corrosion Of Austenitic Steels In Nacl-kcl-vcl 2 Meltssupporting

confidence: 81%

“…Smirnov and I.N. Ozeryanaya and our recent results obtained employing spectroelectrochemical method (22,24,25). The measured rates of corrosion of metallic chromium, iron, nickel and molybdenum after 12 h of contact with NaCl-KCl-VCl 2 melt are also presented in Table II.…”

Section: Corrosion Of Individual Metals In Nacl-kcl-vcl 2 Meltsmentioning

confidence: 64%

“…We weren't able to determine the average molybdenum oxidation state due to very low concentration in the electrolytes obtained after corrosion observation. However taking into account the speciation and electrochemical behavior of molybdenum in chloride melts we propose that Mo(III) ions constitute the main product of Mo corrosion in NaCl-KCl-VCl 2 melt at 750 0 C (22,24,(28)(29)(30).…”

Section: Corrosion Of Individual Metals In Nacl-kcl-vcl 2 Meltsmentioning

confidence: 99%

“…The increase of exposure time to over 1000 h led to selective enrichment of the melt in chromium as the most electronegative steel component (12). Recently we have demonstrated that iron, chromium and manganese species are the major corrosion products of the stainless steel types AISI 316L, 316Ti and 321 in NaCl-KCl equimolar mixture at 750 0 C (22)(23)(24). It was shown that carbon content determines the corrosion resistance of steels through the sensitization effect caused by the high temperatures.…”

Section: Introductionmentioning

confidence: 99%

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Corrosion of Austenitic Steels and Their Components in Vanadium-Containing Chloride Melts

et al. 2013

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Corrosion behavior of stainless steel types AISI 316L, 316Ti and 321 and their components (iron, chromium, nickel and molybdenum) was studied at 750 0C in NaCl-KCl-VCl2 melts. It was found that iron, chromium and manganese species constitute the major corrosion products of austenitic steels and Fe2+, Cr2+, Ni2+, and Mo3+ ions are formed as a result of interaction of corresponded metal and vanadium-containing chloride melts. It was found that austenitic stainless steels are subjected to high temperature sensitization and this phenomenon determines the intergranular character of steel corrosion. Presence of vanadium ions in electrolyte leads to intensification of corrosion processes due to increased oxidation of electronegative steel components and alloy formation. Metallic molybdenum has highest corrosion resistance among studied construction materials.

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Section: Corrosion Of Austenitic Steels In Nacl-kcl-vcl 2 Meltssupporting

confidence: 86%

Section: Corrosion Of Austenitic Steels In Nacl-kcl-vcl 2 Meltssupporting

confidence: 81%

Section: Corrosion Of Individual Metals In Nacl-kcl-vcl 2 Meltsmentioning

confidence: 64%