Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Internal oxidation coatings

D. E. Bartak, T. D. Schleisman, and E. R. Woolsey, "Electrodeposition and Characteristics of a SUicon—Oxide Coating for Magnesium AUoys," Paper T-91-041, North American Die Casting Association 16th International Die Casting Congress and Exposition, Detroit, Mich., 1991. [Pg.337]

The impressed current method with metal oxide-coated niobium anodes is usually employed for internal protection (see Section 7.2.3). In smaller tanks, galvanic anodes of zinc can also be used. Potential control should be provided to avoid unacceptably negative potentials. Pure zinc electrodes serve as monitoring and control electrodes in exposed areas which have to be anodically cleaned in the course of operation. Ag-AgCl electrodes are used to check these reference electrodes. [Pg.468]

Fig.8. Optical micrograph of a cross section of Fe Al, oxidized in H2/H2O at 900°C. (A Ni coating is applied for the preparation of the cross section). Internal oxidation (black intrusions), iron protrusions on top of oxide scale (bright half circles on top of oxide scale)... Fig.8. Optical micrograph of a cross section of Fe Al, oxidized in H2/H2O at 900°C. (A Ni coating is applied for the preparation of the cross section). Internal oxidation (black intrusions), iron protrusions on top of oxide scale (bright half circles on top of oxide scale)...
Figure 14.36 Schematic construction of (a) a pyrite-iodine (FeS2-l2) photoelectrochemical cell and (b) a dye sensitised titanium dioxide (Ti02) photoelectrochemical cell. In both cells the generation of electron and hole pairs by the interaction of photons from the sun, with the semiconducting pyrite crystal in part (a) and with the dye coated onto the Ti02 in part (b), leads to power output. The cell is completed by an internal oxidation-reduction cycle involving iodide ions. The thin arrows show the electron and hole paths in the cell... Figure 14.36 Schematic construction of (a) a pyrite-iodine (FeS2-l2) photoelectrochemical cell and (b) a dye sensitised titanium dioxide (Ti02) photoelectrochemical cell. In both cells the generation of electron and hole pairs by the interaction of photons from the sun, with the semiconducting pyrite crystal in part (a) and with the dye coated onto the Ti02 in part (b), leads to power output. The cell is completed by an internal oxidation-reduction cycle involving iodide ions. The thin arrows show the electron and hole paths in the cell...
Because RBSN employs gaseous reactants, the SiC/RBSN material tends to have higher levels of frequently interconnected, residual porosity than the SiC/Si3N4 composite fabricated by pressure assisted sintering methods. Interconnected residual porosity remains an important issue for two reasons oxidation and thermal conductivity. Internal oxidation can lead to internal stresses which may cause premature matrix cracking and fiber delamination. Thus, to avoid internal oxidation protective coatings may be necessary for these materials. [Pg.151]

Internal pores in SiC/RBSN composites are unavoidable and reduce their oxidation resistance and thermal conductivity. Functionally graded oxidation resistant surface coatings appear to avoid internal oxidation problems for unstressed conditions. [Pg.170]

Blister formation or raised areas in the cladding of spent nuclear fuel can lead to breach of the aluminium cladding and subsequent corrosion of the fuel core. This blistering is a manifestation of internal gas pressurization and/or internal oxide formation. Blistering is facilitated under coatings and oxides because hydrogen has low diffusion rates in aluminium, so trapped hydrogen disperses slowly. Blisters can be formed by several mechanisms. [Pg.55]

Bartak, D. E., Schleisman, T. D., and Woolsey, E. R., Electrodeposition and Characteristics of a Silicon-Oxide Coating for Magnesium Alloys," Proceedings of the International Magnesium Association, Quebec City, 1991, pp. 55-60. [Pg.546]


See other pages where Internal oxidation coatings is mentioned: [Pg.156]    [Pg.542]    [Pg.392]    [Pg.44]    [Pg.100]    [Pg.156]    [Pg.271]    [Pg.285]    [Pg.221]    [Pg.476]    [Pg.486]    [Pg.134]    [Pg.312]    [Pg.24]    [Pg.69]    [Pg.83]    [Pg.320]    [Pg.322]    [Pg.324]    [Pg.657]    [Pg.20]    [Pg.845]    [Pg.156]    [Pg.480]    [Pg.497]    [Pg.604]    [Pg.138]    [Pg.144]    [Pg.589]    [Pg.8]    [Pg.149]    [Pg.162]    [Pg.165]    [Pg.169]    [Pg.286]    [Pg.191]    [Pg.498]    [Pg.276]   
See also in sourсe #XX -- [ Pg.319 ]




SEARCH



Internal oxidation

Oxide coating

Oxidic coatings

© 2024 chempedia.info