Steel 12X18H10T Research Articles

Study the kinetics of heterogeneous catalytic oxidation of methane on palladium metal-foil catalysts

The article presents the results of the study of the kinetics of heterogeneous catalytic oxidation of methane by oxygen on the developed catalysts, containing oxides of Cr, Ni, Fe, implanted by aluminum nitride, activated with palladium and deposited on a metal-foil carrier made of steel 12X18H10T. We have developed the technology of metal-foil cellular catalyst, activated with palladium, applying the method of ion implantation. This method is known as the technology of various composites with high wear resistance, corrosion resistance, but it was used little for the catalysts previously. As the catalyst for the experiment we used the samples with the percentage of palladium concentration 0.07% and 0.15%. The experimental data were processed with the hypothesis of the mechanism as a kind of power rate equation of type, as well as the sorption type of Langmuir-Hinshelwood mechanism. The obtained kinetic equations provide an opportunity to explore according to the full two-phase mathematical model of reactor, the technology of catalytically stabilized combustion of hydrocarbon fuels

The effects of deformations by rolling and uniaxial tension on the structure and the magnetic and mechanical properties of armco iron, steel 12X18H10T, and a steel 12X18H10T-Armco Iron-Steel 12X18H10T composite material

The effects of elasto-plastic deformations by rolling and uniaxial tension on the structure and the magnetic and mechanical properties of Armco Iron, 12X18H10T steel, and a three-layer Steel 12X18H10T-Armco Iron-Steel 12X18H10T model composite material are investigated. The magnetic characteristics, which vary uniquely during elasto-plastic deformations, thus allowing their use as parameters for estimating mechanical properties and the degree of deformation by rolling and uniaxial tension in items made of these materials, are determined.

Water electrolysis using electrodes with modified surface/volume

Steel (12X18H10T) as the real electrode material is investigated to be used for different electrolysis applications, as the parallel plate electrodes for standard electrolysis in alkaline solutions, as well as the coaxial electrodes for high voltage short pulse electrolysis in water. The increase of catalytic activity of steel electrodes for the hydrogen evolution reaction (HER) in different electrolytes could be easy achieved by co-deposition of metal hydride (LaNi5) particles with electrolytic nickel. The results revealed that Ni + LaNi5 with high real surface have a very high activity for the HER, due to the high active surface and specific microstructural features determining the electrocatalytic activity of the investigated alloys.

Kinetics of Galvanostatic Chloride Pitting of Stainless Steels in Chloride Solutions

To check the theory, the corrosion of steels 12X18H10T and 10X17H13M2T is studied during galvanostatic polarization at different \(C_{Cl^ - }\), current densities, and temperatures. The morphology and size distribution of pits are discussed. In E vs. logτ curves are shown to demonstrate a single linear segment for steel 12X18H10T and two linear segments for 10X17H13M2T (as for pure Fe, according to the literature data [12]), namely, the initial segment with a steep slope and the later one with more gentle slope. The single slope ¦− ∂E/∂ log τ of steel 12X18H10T and the later (gentle) slope, which is observed for both steel 10X17H13M2T and Fe, correspond to those predicted in [3, 4, 7], while the earlier steep slope corresponds to crevice-type pitting.

Corrosion of Heating Surfaces of Power Station Boiler Equipment Made of Steel 12X18H10T

The long-term operation of thermal power equipment made of 12X18H10T steel at a temperature of ≥550°C and higher changes its performance due to the changed composition of inside surfaces and bodies of tubes. To avoid deterioration of service characteristics during the operation, the thermal equipment is recommended to make of low-carbon chrome-nickel stainless steels or niobium-stabilized steels. Preservation of the equipment by octadecylamine should be carried out only at a working temperature below its thermodestruction temperature.

Effect of Moving Medium on the Passivation and Limiting Dimensions of Pits

Based on the conditions of the formation and existence of salt film in pits a model for determining their passivation conditions and limiting dimensions in moving media is proposed. The tests of the model in chloride solutions on either totally on locally activated electrodes of steel 12X18H10T (in a hydrodynamic system consisting of two disks for the latter case), as well as in a real corrosion system confirmed the its applicability to predicting pitting corrosion of stainless steels in moving liquids.