IS 4759 PDF
“Knowledge is such a treasure which cannot be stolen”. IS (): Hot-dip zinc coatings on structural steel and other allied products [MTD 7: Light Metals. IS Hot-dip zinc coatings on structural steel and other allied products Designator of Legally Binding Document: IS Title of Legally. IS b) Guidelines on the properties of the articles to be coated that affect the results of Hot-Dip Coatings have been incorporated.2 of this standard. but where there is a special user requirement.1 Mass of Zinc Coating The steel products may.
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IS Indian Standard. HOT-DIP ZINC COATINGS ON. STRUCTURAL STEEL AND OTHER ALLIED. PRODUCTS - SPECIFICATION. 1 SCOPE. download BIS IS (R) HOT-DIP ZINC COATINGS ON STRUCTURAL STEEL AND OTHER ALLIED PRODUCTS from SAI Global. Second edition. Tolerances for fasteners — Details of the software products used to create this PDF file can be found in the General Info.
Metallurgical Engineering Section Name: Hot-dip zinc coatings on structural steel and other allied products Number of Amendments: Superceded by: Identifier gov. Identifier-ark ark: Ppi Rights Published under the auspices of the Right to Information Act There are no reviews yet.
Be the first one to write a review. Their structures are characterized by two-dimensional shear plane slabs of Ti-O octahedra. Ti4O7 has been utilized as a Pt catalyst support for fuel cells because of its high electronic conductivity about threefold greater than graphite 29 ; however, its utilization in an ultrahigh surface area modification, which is essential for optimal sulphide interaction, has not yet been reported for energy-storage applications.
We synthesized this material by a simple polymer-mediated route see Methods for details that relies on the crosslinking of titanium ethoxide with polyethylene glycol followed by carbothermal reduction to crystallize the desired oxygen-deficient titanium oxide.
The X-ray diffraction pattern Fig. The latter is important both to maintain a high surface area and to serve as a hydrophobic component for binding sulphur. High-resolution transmission electron microscopy TEM images Fig.
This gives rise to a bulk four-point probe electronic conductivity on pressed pellet of 3. This is essential for interfacial interaction with LiPSs upon cycling as will be demonstrated below.
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The isotherm measurement also shows the presence of micro and mesopores Supplementary Fig. Figure 1: Physical characterization of the synthesized Ti4O7.
Scale bar, 10 nm. In addition to intrusion into the pores, sulphur forms a conformal coating on the reduced oxide, as shown using scanning electron microscopy SEM, Supplementary Fig.
The latter was prepared using previously reported methods An equivalent amount of target host material based on surface area was first added to a solution of Li2S4 in tetrahydrofuran. Addition of Ti4O7 rendered the Li2S4 solution light yellow immediately upon contact and almost completely colourless after it was stirred for 1 h—indicating strong adsorption—whereas the graphite or VC solutions remained intense yellow-gold, indicative of no interaction.
The spectrum of Li2S4 Fig. The assignment is based on comparison with values reported for copper polysulphides 32 and the similarity of the spectrum to that of other polysulphides we synthesized Supplementary Fig. The assignment is in accord with the proposed chain-like structure of LiPSs where ab initio calculations show that the negative charge is localized at the termini.
A similar binding energy The terminal sulphur is more affected owing to its higher electron density.
We further note that binding energy shifts of a similar magnitude 1. The minor, broad background contribution between and This, along with the intense colour of the Li2S4 solution even after long-term contact with VC, suggests that almost no adsorption occurs, resulting in essentially unaltered Li2S4 spectral features. An additional peak at This can be explained by the fact that where little or no interaction of LiPSs with support is present—as in the case of VC and graphite—the polysulphide species exist in rapid equilibria in solution.
Shifting of the equilibrium towards elemental sulphur formation is driven both by its insolubility and strong interaction with the carbon surface, thus accounting for the C-S0 contribution. These findings are in full accord with the LiPS adsorption studies described above.
These performed almost identically. Improved long-term cycling performance compared with Vulcan carbon is very evident Fig.
IS Hot-dip zinc coatings on structural steel and other allied products
To probe the effectiveness of the chemical interaction on the suppression of the polysulphide shuttle, cells without LiNO3 additive in the electrolyte were also examined. This powerful tool has been previously used by us for monitoring sulphur speciation in Li-S cells 31 , and a significant theoretical understanding of the spectroscopic signatures has been recently reported In order to necessarily avoid self-absorption in the XANES experiments 31 and also to preferentially probe the sulphur host interface, both working electrodes were prepared with a low sulphur weight fraction see details in Supplementary Fig.
The contributions of the species at various states of discharge are shown in Fig. LiPSs chemically adsorbed on the Ti4O7 host are much more readily reduced to Li2S than in the case of carbon, as indicated by the reduced overpotential Supplementary Fig. See Supplementary Fig.
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For the kinase domain of FGFR2, there are four sites for ligand interaction. Two of these sites seem to interact with alpha helices and the other two sites are located in linker domains.
The ligands of FGFR would be fibroblast growth factors. The immunoglobulin-like domains detect the FGF, the membrane-spanning segment allows a signal to cross the cell membrane, and the kinase domain phosphorylates its partner.
Figure 6 and 7 show 2 instances of FGFR2 extracellular binding. There are 6 conserved domains between species. They are 3 immunoglobulin type C-2 and immunoglobulin-like domains and 2 protein kinase catalytic domains.The total intronic length is 99,bp.
As hot-dip galvanizing is a form of heat treatment also. Some increase in coating thickness may be obtained. Books by Language. This is suspected to be because carbon, being non-polar in nature, does not bind favourably to the polar and ionic sulphides.
This Indian Standard has been developed from Doc: These studies provide measure of the charge-transfer resistance at the positive or negative electrode interface resulting from deposition of products on discharge and charge