National Repository of Grey Literature 15 records found  1 - 10next  jump to record: Search took 0.01 seconds. 
Methodology for the classification of corrosion aggressiveness of internal environments contaminated with volatile organic acids
Kouřil, M. ; Boháčková, T. ; Švadlena, J. ; Prošek, T. ; Strachotová, K. Ch. ; Kreislová, K. ; Fialová, P. ; Majtás, Dušan
The aim of the methodology is to specify the procedures for determining the corrosion aggressiveness of internal atmospheres for the area of historic preservation, especially in objects with an increased risk of volatile occurrence\norganic substances, which can endanger metal and other objects with their corrosive aggressiveness cultural and historical value. Target locations are, for example, archives, libraries, exhibition spaces and depositories of museums and churches and target objects of lead seals, organ pipes containing lead, stained glass windows, tin-lead dishes, technical monuments with lead solders, printing letters, etc.
Metodika klasifikace korozní agresivity vnitřních prostředí znečištěných těkavými organickými kyselinami
Kouřil, Milan ; Boháčková, Tereza ; Švadlena, Jan ; Prošek, Tomáš ; Strachotová, Kristýna Charlotte ; Kreislová, Kateřina ; Fialová, Pavlína ; Majtás, Dušan
Corrosion of metal historical artefacts by volatile organic acids (VOA) is common in indoor atmospheres where VOA sources are present and where insufficient measures are taken to eliminate the aggressive effects of these substances on metals. The procedure for determining the corrosion aggressiveness of indoor atmospheres towards metals is defined in three parts of the standard EN ISO 11844 'Corrosion of metals and alloys - Classification of indoor atmospheres with low corrosion aggressivity'. The corrosion aggressivity classes (IC1 to IC5) are based, among others, on the determination of the mass loss of corrosion coupons of silver, copper, steel, zinc and lead. Lead was included in the first part of EN ISO 11844-1 in 2021, based on the results of the NAKI II project "Methodology for the classification of corrosion aggressiveness of indoor environments for lead alloy collectors" (DG18P02OVV050), as a metal specifically sensitive to the presence of volatile organic acids. The aim of the methodology is to specify the procedures for determining the corrosion aggressivity of indoor atmospheres for the field of conservation, especially in objects with a higher risk of the presence of volatile organic compounds, which can threaten metallic monuments by their corrosion aggressivity. Thus, target locations are, for example, archives, libraries, exhibition spaces and depositories of museums and churches, and target objects are lead seals, organ pipes containing lead, stained glass, pewter utensils, etc. The sources of VOCs include a range of materials that make up common furnishings in indoor environments - wood paneling and ceilings, furniture, cabinets, display cases, as well as other items on display or stored.
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Corrosion behaviour of hot dip zinc coatings in soil
Kreislová, K. ; Barták, Z. ; Fialová, P. ; Majtás, Dušan
Paper gives some results of corrosion test of zinc coating in soil in the ČR in comparison with contemporary published data. There is given also case study of hot dip zinc coating´s corrosion on specific bridge object.
Iron alloys outdoor corrosion and laboratory simulation - comparison
Majtás, Dušan ; Mácová, Petra ; Kreislová, Kateřina ; Příhoda, J.
Simulation of iron alloy corrosion is widespread used to predict corrosion resistance. The simulation using corrosion chambers or climatic chambers provides reasonable information on corrosion resistance, the corrosion rate however must be compared to real exposition as the corrosion in simulated environment is accelerated compared to real situation. However the composition of corrosion products and its structure is different question. The corrosion products composition is dependent on corrosion process. The phases present are most likely the same, most voluminous hydrated oxides and oxy-hydroxides on the outside where the less voluminous oxides are present in the lower layers. However this macroscopic phase structure may not fully describe the layered structure of corrosion products, thickness of corrosion products or mechanical properties. In the vicinity of crack in corrosion products the structure is more likely to be similar to the structure near the surface.
Cross-section analysis and mapping using Raman spectroscopy
Majtás, Dušan ; Mácová, Petra ; Kreislová, Kateřina
When dealing with corroded objects, it is necessary to identify the corrosion products to develop a proper treatment for this particular object. Using X-ray diffraction is still suitable to do the phase composition analysis of the material; however it does the analysis of the material in bulk. It is also possible to use SEM to analyze the structure of the corrosion layers on a cross-section by EBSD method; however this method is time consuming. It is more suitable to use Raman spectroscopy when studying the structure of corrosion layers. Using proper equipment, such as Raman microscope it is possible to do not only analysis of precisely given point, but it is also possible to do mapping (both 1D and 2D) of the cross-section. Taking map of surface also does need time, but is definitely less time consuming compared to EBSD method.
Cracking of ferritic stainless steel tubes during production process
Majtás, Dušan ; Kreislová, K. ; Viani, Alberto ; Pérez-Estébanez, Marta ; Geiplová, H.
From the economic reasons many products originally made from austenite stainless steel are nowadays made from ferritic stainless steel. Ferritic steels have relatively low yield strength and the work hardening is limited. They cannot be hardened by heat treatment and only moderately hardened by cold working. Commercially made stainless steel tubes from ferritic steel, used for industrial plumbing was examined on presence of cracks. The cracking was present on the inner side of the convoluted tube shape. The tube manufacturing process consisted of continual bending of the sheet to tube shape, weld the tube, then of cold shaping by pulling through rib-forming frames, which is done in several steps. Then thermal treatment applies to the nearly finished product to remove stress remaining in the structure. Prime suspect was deformation beyond the ductility of used material. However the stress-strain tensile testing does not approved this hypothesis. Several samples of failed material were taken together with reference, and were examined by optical microscopy, and X-Ray Diffraction structure analysis. The structure of the cracked tubes does not show the signs of deformation over the limit, except the location near to the crack itself. Interestingly enough the failed material showed more homogenous structure than the original one. Needle like structures were found when the material is “overetched”, on these structures concentration of stress under bending occur. This structure was identified as δ-ferrite, however its presence in α-ferrite matrix is unclear.
Methods of pitting corrosion evaluation
Kreislová, K. ; Nováková, R. ; Majtás, Dušan
The article describes methods for measuring the depth of pitting corrosion attack. Comparison of digital microscopy and common metallography on sample crossection is made.
Oborový manuál pro prevenci a minimalizaci odpadů: Návrh obecného manuálu minimalizace odpadů
INOTEX, s.r.o., Dvůr Králové n.L. ; SVÚOM s.r.o., Praha ; České centrum čistší produkce, Praha ; Zbořil, Josef ; Bořková, Marcela ; Marek, Jan ; Bartušek, Pavel ; Janák, Petr ; Trojan, Václav ; Kreislová, Kateřina ; Novák, Libor ; Krčma, Miroslav ; Christianová, Anna
Manuál je založen na obecném schématu projektu prevence a minimalizace odpadů, uvádí konkrétní příklady řešení v jednotlivých krocích: I. Stanovení cíle a strategie projektu. II. Vazba na environmentální politiku a plán odpadového hospodářství. III. Rozhodnutí o dalším kroku podle postupu při výběru odpadů. IV. Analýza materiálových toků souvisejících s vybraným odpadem. V. Vstup externích informací. VI. Návrh preventivních opatření a výběr optimálního řešení. VII. Interní recyklace. VIII. Externí recyklace.
Oborový manuál pro prevenci a minimalizaci odpadů
INOTEX, s.r.o., Dvůr Králové n.L. ; SVÚOM s.r.o., Praha ; České centrum čistší produkce, Praha ; Zbořil, Josef ; Bořková, Marcela ; Marek, Jan ; Bartušek, Pavel ; Janák, Petr ; Trojan, Václav ; Kreislová, Kateřina ; Novák, Libor ; Krčma, Miroslav ; Christianová, Anna
V roce 2001 byly řešeny tyto části projektu: Strategie prevence a minimalizace odpadů (politiky resortů a dobrovolné aktivity podniků); Rozlišování mezi prevencí a minimalizací odpadu; Databáze o odpadech vzniklých při průmyslových činnostech a službách (textilní a papírenský průmysl, povrchové úpravy); Zkušenosti s preventivními opatřeními na místě vzniku odpadů; Interní a externí recyklace v ČR.
Oborový manuál pro prevenci a minimalizaci odpadů
INOTEX, s.r.o., Dvůr Králové n.L. ; SVÚOM s.r.o., Praha ; České centrum čistší produkce, Praha ; Koubský, Jan ; Zbořil, Josef ; Bořková, Marcela ; Marek, Jan ; Janák, Petr ; Bartušek, Pavel ; Penz, Jan ; Trojan, Václav ; Kreislová, Kateřina ; Hanus, Robert ; Ouředníková, Klára ; Novák, Libor ; Krčma, Miroslav ; Christianová, Anna
Zpráva za rok 2003 popisuje činnosti spojené s ověřováním manuálu, návrhem software a možnostmi zapojení dalších databází. Obecný manuál byl doplněn a ověřován ve vybraných podnicích textilního a papírenského průmylu a povrchové úpravy kovů.

National Repository of Grey Literature : 15 records found   1 - 10next  jump to record:
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9 Kreislová, Kateřina
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