scholarly journals Phase Composition Study of Corrosion Products at NPP

10.5772/34288 ◽  
2012 ◽  
Author(s):  
V. Slugen ◽  
J. Lipka ◽  
J. Dekan ◽  
J. Degmova ◽  
I. Toth
Keyword(s):  
Phase Composition ◽  
Corrosion Products ◽  
Composition Study

Morphology and phase composition of corrosion products formed at the zinc–iron interface of a galvanized steel

2008 ◽  
Vol 50 (9) ◽  
pp. 2605-2613 ◽  
Author(s):  
M. Carbucicchio ◽  
R. Ciprian ◽  
F. Ospitali ◽  
G. Palombarini
Keyword(s):  
Phase Composition ◽  
Corrosion Products ◽  
Galvanized Steel

scholarly journals Bismuth–iron-based precursor: preparation, phase composition, and two methods of thermal treatment

RSC Advances ◽  
2020 ◽  
Vol 10 (35) ◽  
pp. 20713-20723
Author(s):  
Yunpeng Liu ◽  
Hao Wang ◽  
Lixiong Qian ◽  
Xiaoyi Zhao ◽  
Lei Yao ◽  
...  
Keyword(s):  
Phase Composition ◽  
Thermal Treatment ◽  
Hydrothermal Processes ◽  
Preparation Phase ◽  
Iron Based ◽  
Composition Study

Preparation and phase composition study of bismuth–iron-based precursor, and its thermal treatment by calcination and hydrothermal processes, which can be used to control the synthesis of pure BiFeO3.

Modeling of the Phase Formation Processes on the Steel Surface Contacting with Water Medium under Conditions of Deep Geological Repository

2021 ◽  
Vol 20 ◽  
pp. 60-72
Author(s):  
О. М. Lavrynenko ◽  
◽  
B. G. Shabalin ◽  
◽  
Keyword(s):  
Phase Composition ◽  
Phase Formation ◽  
Steel Surface ◽  
Spinel Ferrite ◽  
Corrosion Products ◽  
Chemical Mechanism ◽  
Formation Processes ◽  
Deep Geological Repository ◽  
Iron Oxyhydroxides ◽  
Geological Repository

The experimental modeling of the corrosive phase formation processes was performed under conditions approaching the initial and transitional stages of evolution of the deep geological repository (the hydrogen index of the medium lied in the range of 9–12 and a temperature was 50–70 °C). The specificity of the system of rotating disk electrode made it possible to determine the phase composition of corrosion products formed under oxidative conditions (the near surface layer, NSL) and, conditionally, reductive — on the steel surface (SL) covered by NSL, that significantly complicated the access of oxygen into the reaction area. It was determined that phase composition of the corrosion products at the pH0 values 9–11 was identical and it is regulated by the compensative action of cathodic half-reaction of oxygen reducing on the steel surface. Green Rust and magnetite or non-stoichiometric spinel ferrite characterized by coagulative type of the structure and spherical particle shape were determined as the main phases of SL. Iron oxyhydroxides — goethite and lepidocrocite were presented as the phases of NSL. Increase in the pH0 to 12 changes the chemical mechanism of the corrosion process and it leads to the formation of weak crystallized iron oxyhydroxide phases. It was proved the main phase formed under corrosion of steel at 50–70 °C was spinel ferrite. Its morphology is presented as the cubic shaped particles that evidences about condensingcrystallizing mechanism of their formation. Generally, the presence of Co2+ and Mn2+ cations does not influence on the phase formation process and the phase composition as well, whereas the iron oxyhydroxides with admixture of Mn2+ and Mn3+ oxygen compounds are dominant in the sediment compositions when they are formed in the presence of Mn7+.

Temperature-dependent phase composition of fluorinated zinc phthalocyanine thin films and their sensing properties towards gaseous NO2

CrystEngComm ◽  
2021 ◽  
Author(s):  
Jan Vlček ◽  
Irina A. Kühne ◽  
Dominika Zákutná ◽  
Eva Marešová ◽  
Ladislav Fekete ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase Composition ◽  
Zinc Phthalocyanine ◽  
Temperature Dependent ◽  
Sensing Properties ◽  
Zinc Phthalocyanines ◽  
Composition Study

This work presents a temperature-dependent phase composition study of thin films (200 nm) of fluorinated zinc phthalocyanines (4F, 16F) and their chemiresistive response towards NO2 gas.

Sign in / Sign up

Export Citation Format

Share Document