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| rdf:type
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| Description
| - High-alloy martensitic steels are used as construction materials in power generating equipments. The problem of these steels, which are most often alloyed with chromium, molybdenum and tungsten, is a possible increase in structural instability during heat treatment or a long-term heating process. The formation of structural instability causes deterioration of mechanical properties and corrosion resistance and leads to overall shortening of the equipment service life. Chromium and molybdenum are elements, which in alkaline environment can easily pass into a transpassive state, and that can be detected for example on a polarization curve of the material in an appropriate environment. The aim of this work was to confirm the possibilities of using electrochemical polarization as a very simple, non-destructive method of investigation into the formation of structural changes in these materials. Potentiostatic etching was also carried out together with measuring of potentiodynamic curves. Potentiodynamic measurements showed the possibility of using this method for the detection of development of spinodal decomposition in ferritic steels and also for the detection of structural changes during heat treatment of martensitic chromium steels. Structural modifications induced changes in local maximum parameters on the polarization curve in the region of transition into the transpassive state. Current density in the maximum of this peak is probably proportional to the amount of alloying elements in carbides. It has been shown that the sensitivity of this method could be increased by prior surface passivation or by saturation with hydrogen from an appropriate electrolyte.
- High-alloy martensitic steels are used as construction materials in power generating equipments. The problem of these steels, which are most often alloyed with chromium, molybdenum and tungsten, is a possible increase in structural instability during heat treatment or a long-term heating process. The formation of structural instability causes deterioration of mechanical properties and corrosion resistance and leads to overall shortening of the equipment service life. Chromium and molybdenum are elements, which in alkaline environment can easily pass into a transpassive state, and that can be detected for example on a polarization curve of the material in an appropriate environment. The aim of this work was to confirm the possibilities of using electrochemical polarization as a very simple, non-destructive method of investigation into the formation of structural changes in these materials. Potentiostatic etching was also carried out together with measuring of potentiodynamic curves. Potentiodynamic measurements showed the possibility of using this method for the detection of development of spinodal decomposition in ferritic steels and also for the detection of structural changes during heat treatment of martensitic chromium steels. Structural modifications induced changes in local maximum parameters on the polarization curve in the region of transition into the transpassive state. Current density in the maximum of this peak is probably proportional to the amount of alloying elements in carbides. It has been shown that the sensitivity of this method could be increased by prior surface passivation or by saturation with hydrogen from an appropriate electrolyte. (en)
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| Title
| - Detection of structural changes in chromium martensitic steels using electrochemical methods
- Detection of structural changes in chromium martensitic steels using electrochemical methods (en)
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| skos:prefLabel
| - Detection of structural changes in chromium martensitic steels using electrochemical methods
- Detection of structural changes in chromium martensitic steels using electrochemical methods (en)
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| skos:notation
| - RIV/60461373:22310/11:43892974!RIV12-MSM-22310___
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
| - P(FR-TI1/086), Z(MSM6046137302)
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
| |
| http://linked.open...ai/riv/idVysledku
| - RIV/60461373:22310/11:43892974
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| http://linked.open...riv/jazykVysledku
| |
| http://linked.open.../riv/klicovaSlova
| - high-alloy creep-resistant steels, structural changes, electrochemical polarization (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...ontrolniKodProRIV
| |
| http://linked.open...v/mistoKonaniAkce
| |
| http://linked.open...i/riv/mistoVydani
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| http://linked.open...i/riv/nazevZdroje
| - Conference proceedings, 20th International Conference on Metallurgy and Materials
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| http://linked.open...in/vavai/riv/obor
| |
| http://linked.open...ichTvurcuVysledku
| |
| http://linked.open...cetTvurcuVysledku
| |
| http://linked.open...vavai/riv/projekt
| |
| http://linked.open...UplatneniVysledku
| |
| http://linked.open...iv/tvurceVysledku
| - Bystrianský, Jaroslav
- Svobodová, Marie
- Rapouch, Jiří
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| http://linked.open...vavai/riv/typAkce
| |
| http://linked.open.../riv/zahajeniAkce
| |
| http://linked.open...n/vavai/riv/zamer
| |
| number of pages
| |
| http://purl.org/ne...btex#hasPublisher
| |
| https://schema.org/isbn
| |
| http://localhost/t...ganizacniJednotka
| |
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