A numerical investigation of the effect of external resistance and applied potential on the distribution of periodicity and chaos in the anodic dissolution of nickel

2020 ◽  
Vol 22 (38) ◽  
pp. 21823-21834
Author(s):  
Caio da S. Rodrigues ◽  
Caio G. P. dos Santos ◽  
Renan C. C. de Miranda ◽  
Eduardo Parma ◽  
Hamilton Varela ◽  
...  
Keyword(s):  
Phase Diagrams ◽  
Numerical Investigation ◽  
Anodic Dissolution ◽  
Low Density ◽  
Applied Potential ◽  
External Resistance

Low density, elongation, and suppression of the shrimp-like structures in the resistance-potential phase diagrams have been observed in the oscillatory dissolution of nickel.

A Numerical Investigation of the Effect of External Resistance and Applied Potential on the Distribution of Periodicity and Chaos in the Anodic Dissolution of Nickel

2021 ◽  
Vol MA2021-01 (48) ◽  
pp. 1959-1959
Author(s):  
Caio Silva Rodrigues ◽  
Caio Guilherme Pereira dos Santos ◽  
Renan Carneiro Cavalcante de Miranda ◽  
Eduardo Parma ◽  
Hamilton Varela ◽  
...  
Keyword(s):  
Numerical Investigation ◽  
Anodic Dissolution ◽  
Applied Potential ◽  
External Resistance

Phase diagrams of low-density polyethylene–alkylbenzene systems

2017 ◽  
Vol 91 (3) ◽  
pp. 425-429 ◽  
Author(s):  
A. N. Ilyasova ◽  
Y. V. Kudryavtsev ◽  
T. N. Lebedeva ◽  
I. V. Levashova ◽  
Yu. A. Flyagina ◽  
...  
Keyword(s):  
Phase Diagrams ◽  
Low Density Polyethylene ◽  
Low Density

Mechanism of Cracking of High Strength Martensltic Stainless Steels in Sodium Chloride Solutions

CORROSION ◽  
1971 ◽  
Vol 27 (8) ◽  
pp. 326-333 ◽  
Author(s):  
B. E. WILDE
Keyword(s):  
Sodium Chloride ◽  
Crack Growth ◽  
Anodic Dissolution ◽  
Hydrogen Absorption ◽  
Corrosion Potential ◽  
High Strength Steels ◽  
High Strength ◽  
Applied Potential ◽  
Sodium Chloride Solutions ◽  
Active Path

Abstract This paper reviews previously proposed mechanisms for the environmentally induced cracking of high strength steels in sodium chloride. The electrochemical basis for the differentiation between hydrogen embrittlement and active path corrosion is examined along with the consequences of the recently demonstrated acidification that occurs in areas of localized geometry such as precracks, pits, and crevices. From electrochemical studies on a modified 12% chromium martensitic stainless steel, data are presented which indicate that hydrogen absorption occurs under conditions of exposure previously thought to preclude this possibility; that is, at applied bulk potentials noble to the reversible hydrogen potential. Data are also presented to show that the activation energy for crack growth at the corrosion potential and at cathodic and anodic applied potential is 9.5 Kcal/mole (±1); a value close to that reported previously for the cracking of cathodically embrittled steel. The experimental data are explained on the basis that an embrittlement process associated with hydrogen absorption is responsible for crack growth under all conditions of applied potential. With polarization at potentials active to the hydrogen reversible potential, hydrogen absorption results directly from the bulk cathodic discharge of protons. At the corrosion potential and more noble potentials, hydrogen absorption takes place from the cathodic discharge of protons occurring in the low pH conditions resulting from the hydrolysis of anodic dissolution products in pits. In the noble potential region, although active path anodic dissolution appears not to be the mechanism of crack growth, anodic dissolution is a prerequisite to crack growth by a hydrogen embrittlement mechanism. It is suggested that a similar mechanism can explain the cracking behavior of other high strength steels in sodium chloride solutions where conditions suitable for hydrolysis arise either by pitting or by crevice corrosion occurring in the presence of a mechanical precrack.

A new look at the semicrystalline polymer – liquid systems: Phase diagrams low-density polyethylene – n-alkanes

2018 ◽  
Vol 471 ◽  
pp. 1-7 ◽  
Author(s):  
Konstantin V. Pochivalov ◽  
Tatyana N. Lebedeva ◽  
Anna N. Ilyasova ◽  
Andrey V. Basko ◽  
Yaroslav V. Kudryavtsev
Keyword(s):  
Phase Diagrams ◽  
Semicrystalline Polymer ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Polymer Liquid ◽  
Liquid Systems ◽  
New Look

scholarly journals Numerical Investigation of Glassy Dynamics in Low-Density Systems

2008 ◽  
Vol 100 (19) ◽  
Author(s):  
Emanuela Zaccarelli ◽  
Stefan Andreev ◽  
Francesco Sciortino ◽  
David R. Reichman
Keyword(s):  
Numerical Investigation ◽  
Low Density ◽  
Glassy Dynamics

Application of Improved Voltage Compensation in the SEM to Imaging of Organic Materials

1973 ◽  
Vol 31 ◽  
pp. 444-445
Author(s):  
P.J. Killingworth ◽  
M. Warren
Keyword(s):  
Electron Beam ◽  
Organic Materials ◽  
Operating Parameters ◽  
Low Density ◽  
Beam Diameter ◽  
Incident Electron Beam ◽  
Specimen Material ◽  
Voltage Compensation ◽  
Selection Of ◽  
Scanning Electron

Ultimate resolution in the scanning electron microscope is determined not only by the diameter of the incident electron beam, but by interaction of that beam with the specimen material. Generally, while minimum beam diameter diminishes with increasing voltage, due to the reduced effect of aberration component and magnetic interference, the excited volume within the sample increases with electron energy. Thus, for any given material and imaging signal, there is an optimum volt age to achieve best resolution.In the case of organic materials, which are in general of low density and electric ally non-conducting; and may in addition be susceptible to radiation and heat damage, the selection of correct operating parameters is extremely critical and is achiev ed by interative adjustment.

Transmission electron microscope studies in special ceramics

1978 ◽  
Vol 36 (1) ◽  
pp. 268-269
Author(s):  
A. Zangvil ◽  
L.J. Gauckler ◽  
G. Schneider ◽  
M. Rühle
Keyword(s):  
Phase Diagrams ◽  
Crystal Structures ◽  
Thin Foil ◽  
Limited Extent ◽  
Complex Materials ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Electron Microscopes ◽  
Lattice Resolution

The use of high temperature special ceramics which are usually complex materials based on oxides, nitrides, carbides and borides of silicon and aluminum, is critically dependent on their thermomechanical and other physical properties. The investigations of the phase diagrams, crystal structures and microstructural features are essential for better understanding of the macro-properties. Phase diagrams and crystal structures have been studied mainly by X-ray diffraction (XRD). Transmission electron microscopy (TEM) has contributed to this field to a very limited extent; it has been used more extensively in the study of microstructure, phase transformations and lattice defects. Often only TEM can give solutions to numerous problems in the above fields, since the various phases exist in extremely fine grains and subgrain structures; single crystals of appreciable size are often not available. Examples with some of our experimental results from two multicomponent systems are presented here. The standard ion thinning technique was used for the preparation of thin foil samples, which were then investigated with JEOL 200A and Siemens ELMISKOP 102 (for the lattice resolution work) electron microscopes.

Sign in / Sign up

Export Citation Format

Share Document