Quantitative direct-current arc analysis of random compositions of microgram residues in silver chloride common matrix

Gordon, W. A.; Chapman, Gilbert B.

doi:10.1016/0584-8547(70)80016-7

Cited by 11 publications

(2 citation statements)

References 2 publications

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“…Frequently, an insoluble residue remained after the acid leach. The residues were examined by inert-arc emission spectrography (17) and were found to consist of Fe with smaller amounts of all the elements found in Alloy L605, the material used in the b u r n e r rig nozzle.…”

Section: Resultsmentioning

confidence: 99%

Theoretical and Experimental Studies of the Deposition of Na2 SO 4 from Seeded Combustion Gases

Kohl¹,

Santoro²,

Stearns³

et al. 1979

J. Electrochem. Soc.

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The deposition of sodium sulfate from flames containing sodium W and sulfur is regarded as one of the fundamental steps in the phenomenon of "hot corrosion" of turbine components. Recently, a local thermochemical equilibrium (LTCE) method of predicting condensation temperatures of sodium sulfate in flame environments was described. This paper presents results of an experimental study to test the validity of the theoretical dew point predictions and to provide the basis for'developing a deposition rate theory. Experiments were run in a Mach 0.3 atmospheric_ pressure laboratory burner rig.. Flames were doped with sea salt, Na2SO 41 and NaCl, respectively. Deposits were collected on cylindrical platinum targets placed in the combustion products, and the deposition was studied as a function of collector temperature .. Experimental deposition onset temperatures checked within experimental error with LTCE-predicted temperatures. A multicoinponent mass transfer equation was developed to predict the rate of deposition of Na2SO4(c) via vapor transport at temperatures below the deposition onset temperature. The phenomena of species transport by simultaneous Fick diffusion, Soret (thermal) diffusion, convection and turbulence are included, sub i ject to the basic assumption that no reaction or phase change occur STAR Category 26 i _j

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Section: Resultsmentioning

confidence: 99%

Theoretical and Experimental Studies of the Deposition of Na2 SO 4 from Seeded Combustion Gases

Kohl¹,

Santoro²,

Stearns³

et al. 1979

J. Electrochem. Soc.

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“…The emission rates were previously shown to be directly proportional to metal concentrations in the arc column (ref. 1).…”

Section: Appendix -Estimate Of Metal -Metal Monoxide Ratios In Arc Comentioning

confidence: 99%

Emission Spectrometric Arcing Procedure with Minimal Effect of Chemical Form of Sample

Gordon

1976

Appl Spectrosc

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This paper describes a study of matrix effects related to the chemical form of materials analyzed. The study was made using an arc in argon buffered with silver chloride. The effect of chemical form was minimal for a variety of metals, oxides, and carbides representing the most refractory compounds and thermally stable metal-containing molecules. Among these, only four of the most refractory materials known showed significant emission depressions due to incomplete volatilization in the arc system. These results are discussed in terms of vapor pressure of the solid materials placed on the anodes and dissociation reactions of the molecules in the gaseous environment.

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Advances in the Static-Argon, Dc-Arc Spectrochemical Source

Gordon

Hambidge²,

Franklin³

1973

Applications of the Newer Techniques of Analysis

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Quantitative direct-current arc analysis of random compositions of microgram residues in silver chloride common matrix

Cited by 11 publications

References 2 publications

Theoretical and Experimental Studies of the Deposition of Na2 SO 4 from Seeded Combustion Gases

Theoretical and Experimental Studies of the Deposition of Na2 SO 4 from Seeded Combustion Gases

Emission Spectrometric Arcing Procedure with Minimal Effect of Chemical Form of Sample

Advances in the Static-Argon, Dc-Arc Spectrochemical Source

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