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gas adsorption

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Published: 01 November 2013
Fig. 4 Effect of particle porosity on (a) green density and (b) green strength of solid and porous iron powders. Powders were pressed at 414 MPa (30 tsi) using die wall lubrication. The figures in parentheses in (a) signify specific surface areas (as measured by the gas adsorption method More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290009
EISBN: 978-1-62708-319-5
.... The external view of the powder failed to detect this internal porosity. Dense particles are necessary for high properties because these internal pores are resistant to sintering densification. Courtesy of J. Marsden The common techniques for measuring surface area are gas adsorption and gas...
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Published: 30 June 2023
Fig. 4.5 Degassing. (a) Degassing process used for hydrogen removal during molten metal processing. (b) Adsorption of hydrogen by gas bubbles during degassing More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290261
EISBN: 978-1-62708-319-5
... system. BET surface area. The speci c surface area as measured by gas adsorption according to the Brunauer-Emmett-Teller theory. Widely used in characterization of ceramic powders and expressed as square meters per gram (m2/g). bimodal. A particle size distribution exhibiting two mode (mode is the most...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.9781627083195
EISBN: 978-1-62708-319-5
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.tm.t52320123
EISBN: 978-1-62708-357-7
...-Boundary Segregation Solute atoms in a material tend to gather on the surface or the grain boundary. This is generally called “interface segregation.” [2] In this section, after learning the adsorption of the gas molecules to the crystal surface that has been investigated best in interface...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2023
DOI: 10.31399/asm.tb.ciktmse.t56080001
EISBN: 978-1-62708-460-4
..., flexibility with various corrosion systems, and high and sustainable IE. The employment of corrosion inhibitors covers many corrosion scenarios including cooling water systems, oil and gas field equipment, paints and coatings, lubricants and metalworking fluids, concrete, and batteries. However, the effective...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740373
EISBN: 978-1-62708-308-9
... MPa (30 tsi) using die wall lubrication. The figures in parentheses in (a) signify specific surface areas (as measured by the gas adsorption method) and average intraparticle pore sizes of powders. Source: Ref 4 One processing method of increasing the green strength is cold isostatic pressing...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2023
DOI: 10.31399/asm.tb.ciktmse.9781627084604
EISBN: 978-1-62708-460-4
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030200
EISBN: 978-1-62708-282-2
... Abstract This chapter provides a detailed account of corrosion inhibitors for oil and gas production. It begins by discussing some of the demands of competitive industry on inhibitor formulations. It then describes the varying characteristics of oil wells, gas wells, water injection systems...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030148
EISBN: 978-1-62708-282-2
... psi) gas pressure 0.1 to 10 ppm total hydrogen content 0.1 to 10 ppm total hydrogen content range of gas pressure exposure Up to 10 2 MPa (15 ksi) at 200–595 °C (400–1100 °F) Hydrogen activity equivalent to 0.2 to 1 × 10 2 MPa (3–15 ksi) at 0–150 °C (30–300 °F) Precipitation of dissolved ingot...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460107
EISBN: 978-1-62708-285-3
... Abstract This chapter provides an overview of the state of the art in high-pressure cold spray equipment, including both spray systems and gas supply systems. The chapter describes the commercial cold spray systems developed by companies such as Cold Gas Technology (CGT) GmbH, Plasma Giken...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 September 2023
DOI: 10.31399/asm.tb.stmflw.t59390064
EISBN: 978-1-62708-459-8
..., and the role of elastic deflection and ultrasonic vibration. adsorption boundary lubrication elastohydrodynamic lubrication frictional instabilities hydrodynamic lubrication lubricant entrainment lubrication regimes mixed lubrication plastohydrodynamic lubrication Reynolds equation Stribeck...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310027
EISBN: 978-1-62708-286-0
..., or transpassive; Fig. 1 illustrates the effect of redox potential on a solution. Fig. 1 Reduction potential versus pH for iron and (a) oxygen gas reduction and (b) hydrogen ionreduction Certain anions have strong effects in media through their well-known, if not well understood, disruption...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240395
EISBN: 978-1-62708-251-8
... carbon. For example, because of the ionizing effect of the plasmas, active carbon for adsorption can be formed directly from methane gas. High temperatures can be used because the process takes place in a vacuum, thus producing a greater carburized case depth than either gas or vacuum carburizing ( Fig...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780146
EISBN: 978-1-62708-281-5
... of plasticizer-polymer interaction may be measured by determining the depression of vapor pressure and melting point by means of osmotic pressure measurements, light scattering, gas-liquid chromatography, solution viscosity, polymer swelling, and calorimetry. The compatibility of a plasticizer...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610501
EISBN: 978-1-62708-303-4
... + + + 2 H Because oxygen is not present, it is difficult for the hydrogen atoms to combine to form hydrogen gas and escape from the surface. When oxygen is introduced and the hydrogen atoms can escape the surface of the iron, depolarization occurs and corrosion resumes. Thus, in this case...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030349
EISBN: 978-1-62708-282-2
... Abstract This chapter examines methods of internal corrosion prediction for multiphase pipelines and details methodologies to perform internal corrosion direct assessment for natural gas pipelines. Further, real-time monitoring techniques for assessing actual corrosion at critical locations...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2022
DOI: 10.31399/asm.tb.dsktmse.t56050001
EISBN: 978-1-62708-432-1
... in vacancy/substitutional diffusion The activation energy in such cases is the energy barrier present along the path from one interstitial site to the other. The activation energy for interstitial diffusion is commonly expressed as Q = 5 RT m , where Q is activation energy, R is the gas...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310057
EISBN: 978-1-62708-286-0
... of the oxidizing gas according to: (Eq 2) Δ G = Δ G 0 + R T l n ( a M e X y a M p X 2 0.5 y ) In the case of alloy oxidation, for which temperatures are high enough to form mixed oxides or spinels, the activities of the oxide...