Lowering the rate of hydrogen diffusion through Kh18N10T steel when the steel surface is oxidized in a tonnage hydrogen atmosphere

1971 ◽  
Vol 30 (1) ◽  
pp. 50-51 ◽  
Author(s):  
V. I. Subbotin ◽  
V. N. Bykov ◽  
F. A. Kozlov ◽  
N. N. Ivanovskii ◽  
V. V. Kazarnikov
Keyword(s):  
Steel Surface ◽  
Hydrogen Diffusion ◽  
Hydrogen Atmosphere ◽  
Kh18n10t Steel

Diffusion of Silver in Silicate Glass and Clustering in Hydrogen Atmosphere

2005 ◽  
Vol 237-240 ◽  
pp. 689-694 ◽  
Author(s):  
Yuri S. Kaganovsky ◽  
E. Mogilko ◽  
A. Ofir ◽  
A.A. Lipovskii ◽  
M. Rosenbluh
Keyword(s):  
Absorption Spectra ◽  
Silicate Glass ◽  
Hydrogen Diffusion ◽  
Hydrogen Atmosphere ◽  
Silver Nanoclusters ◽  
Growth Surface ◽  
Metallic State ◽  
Cluster Growth ◽  
Optical Spectrometry ◽  
Kinetics Of

Annealing in a hydrogen atmosphere of silicate glass plates doped by Ag+ ions leads to the reduction of silver to a metallic state (Ag0) and to the formation of silver nanoclusters. The kinetics of clustering during hydrogen diffusion into the glass and diffusion of Ag0 atoms in the glass matrix have been studied in a temperature ranging from 160 to 200oC by SEM, AFM and optical spectrometry. The absorption spectra have a peak near 410 nm corresponding to the surface plasmon resonance in Ag clusters. The position of the peak moves as the clusters grow. A theoretical analysis of the absorption spectra allowed us to estimate the cluster size as a function of time, as well as the thickness of the layer filled by clusters, which also changes with time. From AFM data we could measure the kinetics of cluster growth on the surface. We have theoretically analyzed the kinetics of cluster growth during reactive hydrogen diffusion, the kinetics of bulk cluster growth, surface cluster growth, and thickening of the layer filled by clusters.

EELS characterization of “Smut” layer films on steel surface prepared for chrome plating by anodic etching

1995 ◽  
Vol 53 ◽  
pp. 538-539
Author(s):  
E Y. Wang ◽  
J. T. Cherian ◽  
A. Madsen ◽  
R. M. Fisher
Keyword(s):  
Steel Surface ◽  
Surface Preparation ◽  
Treatment Method ◽  
Chrome Plating ◽  
Transmission Electron ◽  
Alloy Steels ◽  
Pre Treatment ◽  
Hard Chrome ◽  
Electron Energy Loss

Many steel parts are electro-plated with chromium to protect them against corrosion and to improve their wear-resistance. Good adhesion of the chrome plate to the steel surface, which is essential for long term durability of the part, is extremely dependent on surface preparation prior to plating. Recently, McDonnell Douglas developed a new pre-treatment method for chrome plating in which the steel is anodically etched in a sulfuric acid and hydrofluoric acid solution. On carbon steel surfaces, this anodic pre-treatment produces a dark, loosely adhering material that is commonly called the “smut” layer. On stainless steels and nickel alloys, the surface is only darkened by the anodic pre-treatment and little residue is produced. Anodic pre-treatment prior to hard chrome plating results in much better adherence to both carbon and alloy steels.We have characterized the anodic pre-treated steel surface and the resulting “smut” layer using various techniques including electron spectroscopy for chemical analysis (ESCA) on bulk samples and transmission electron microscopy (TEM) and electron energy-loss spectroscopy (EELS) on stripped films.

Hydrogen diffusion in Zr-Pd amorphous alloys

1993 ◽  
Vol 3 (7) ◽  
pp. 1643-1648
Author(s):  
N. Adnani ◽  
J. M. Titman
Keyword(s):  
Amorphous Alloys ◽  
Hydrogen Diffusion

MÖSSBAUER STUDY OF HYDROGEN DIFFUSION AND INTERSTITIAL SITE OCCUPANCY IN57Co : PdHxAND57Fe : PdHx

1979 ◽  
Vol 40 (C2) ◽  
pp. C2-635-C2-638
Author(s):  
F. Pröbst ◽  
F. E. Wagner ◽  
M. Karger ◽  
G. Wortmann
Keyword(s):  
Hydrogen Diffusion ◽  
Site Occupancy ◽  
Interstitial Site ◽  
Mössbauer Study

Hydrogen diffusion in disordered metals and alloys

2003 ◽  
Vol 173 (10) ◽  
pp. 1107 ◽  
Author(s):  
Aleksei V. Gapontsev ◽  
Vladimir V. Kondrat'ev
Keyword(s):  
Hydrogen Diffusion ◽  
Metals And Alloys ◽  
Disordered Metals

Optical Properties of Mg2NiH4and Hydrogen Diffusion*

1992 ◽  
Vol 1 (1) ◽  
pp. 685-692
Author(s):  
D. Lupu ◽  
R. Grecu ◽  
S. I. Fărcaș
Keyword(s):  
Optical Properties ◽  
Hydrogen Diffusion

The Concentration Dependence of Hydrogen Diffusion in fcc TiHx, TiDxand YHx*

1992 ◽  
Vol 1 (1) ◽  
pp. 631-635
Author(s):  
U. Stuhr ◽  
D. Steinbinder ◽  
H. Wipf ◽  
B. Frick
Keyword(s):  
Concentration Dependence ◽  
Hydrogen Diffusion

Hydrogen Diffusion and Electrotransport Studies in a Pd50Cu50Alloy*

1992 ◽  
Vol 1 (1) ◽  
pp. 792-792
Author(s):  
J. Tóth ◽  
K. Tompa ◽  
I. Bakonyi
Keyword(s):  
Hydrogen Diffusion

Specificity of Lectins Labeled with Colloidal Gold to the Exopolymeric Matrix Carbohydrates of the Sulfate-Reducing Bacteria Biofilm Formed on Steel

2020 ◽  
Vol 82 (5) ◽  
pp. 11-20
Author(s):  
D.R. Abdulina ◽  
◽  
L.M. Purish ◽  
G.O. Iutynska ◽  
◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Colloidal Gold ◽  
Steel Surface ◽  
Lectin Binding ◽  
Sulfate Reducing Bacteria ◽  
Gold Particles ◽  
Sulfate Reducing ◽  
Transmission Electron ◽  
Reducing Bacteria

The studies of the carbohydrate composition of the sulfate-reducing bacteria (SRB) biofilms formed on the steel surface, which are a factor of microbial corrosion, are significant. Since exopolymers synthesized by bacteria could activate corrosive processes. The aim of the study was to investigate the specificity of commercial lectins, labeled with colloidal gold to carbohydrates in the biofilm exopolymeric matrix produced by the corrosive-relevant SRB strains from man-caused ecotopes. Methods. Microbiological methods (obtaining of the SRB biofilms during cultivation in liquid Postgate B media under microaerophilic conditions), biochemical methods (lectin-binding analysis of 10 commercial lectins, labeled with colloidal gold), transmission electron microscopy using JEM-1400 JEOL. Results. It was shown using transmission electron microscopy that the binding of lectins with carbohydrates in the biofilm of the studied SRB strains occurred directly in the exopolymerіс matrix, as well as on the surfaces of bacterial cells, as seen by the presence of colloidal gold particles. For detection of the neutral carbohydrates (D-glucose and D-mannose) in the biofilm of almost all studied bacterial strains PSA lectin was the most specific. This lectin binding in biofilms of Desulfotomaculum sp. К1/3 and Desulfovibrio sp. 10 strains was higher in 90.8% and 94.4%, respectively, then for ConA lectin. The presence of fucose in the SRB biofilms was detected using LABA lectin, that showed specificity to the biofilm EPS of all the studied strains. LBA lectin was the most specific to N-аcetyl-D-galactosamine for determination of amino sugars in the biofilm. The amount of this lectin binding in D. vulgaris DSM644 biofilm was 30.3, 10.1 and 9.3 times higher than SBA, SNA and PNA lectins, respectively. STA, LVA and WGA lectins were used to detect the N-acetyl-Dglucosamine and sialic acid in the biofilm. WGA lectin showed specificity to N-acetyl-D-glucosamine in the biofilm of all the studied SRB; maximum number of bounded colloidal gold particles (175 particles/μm2) was found in the Desulfotomaculum sp. TC3 biofilm. STA lectin was interacted most actively with N-acetyl-D-glucosamine in Desulfotomaculum sp. TC3 and Desulfomicrobium sp. TC4 biofilms. The number of bounded colloidal gold particles was in 9.2 and 7.4 times higher, respectively, than using LVA lectin. The lowest binding of colloidal gold particles was observed for LVA lectin. Conclusions. It was identified the individual specificity of the 10 commercial lectins to the carbohydrates of biofilm matrix on the steel surface, produced by SRB. It was estimated that lectins with identical carbohydrates specificity had variation in binding to the biofilm carbohydrates of different SRB strains. Establishing of the lectin range selected for each culture lead to the reduction of the scope of studies and labor time in the researching of the peculiarities of exopolymeric matrix composition of biofilms formed by corrosiverelevant SRB.

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