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Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004185
EISBN: 978-1-62708-184-9
... Abstract Ammonia and ammonium hydroxide are not particularly corrosive in themselves, but corrosion problems can arise with specific materials, particularly when contaminants are present. This article discusses the corrosion resistance of materials used for the manufacture, handling...
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Published: 30 September 2014
Fig. 12 Simplified process schematic of ammonia dissociator system More
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Published: 01 October 2014
Fig. 22 Lehrer diagram for the formation of iron phase in ammonia-hydrogen mixtures. Source: Ref 7 More
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Published: 01 January 1986
Fig. 2 Configuration of an ammonia gas-sensing membrane electrode. More
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Published: 01 October 2014
Fig. 6 Increase in end-quench hardenability by adding ammonia to the carburizing atmosphere. These curves were obtained under the following processing conditions: 3 h treatment time at 840 °C (1550 °F), water quench; furnace atmospheres: 90% endothermic carrier gas, 10% natural gas under one More
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Published: 30 September 2015
Fig. 16 Ammonia, from which amines are derived, and possible forms of amines More
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Published: 01 December 2004
Fig. 30 Effect of sintering (in dissociated ammonia for 30 min) at different temperatures with pressed iron powder (mixed with 0.75% lubricant and pressed density of 6.5 g/cm 3 ). (a) As-pressed condition with multigranular particles completely separated by voids (black). (b) Sintering at 1065 More
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Published: 01 January 2006
Fig. 5 Corrosion rates of copper alloys in aerated ammonia drip solutions. Source: Ref 26 More
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Published: 01 January 2006
Fig. 6 Examples of ammonia grooving on admiralty brass. (a) The unattacked tube end (left) was protected by the tubesheet. (b) Attack occurred at one side of a tube support plate More
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Published: 01 January 2002
Fig. 10 Effect of grain size on time-to-fracture in ammonia atmosphere. Data are for copper alloy C26800 (yellow brass, 66%) at various values of applied stress. More
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Published: 01 August 2013
Fig. 4 Nitrogen potential as a function of temperature and ammonia additions in a furnace atmosphere. Source: Ref 9 More
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Published: 01 August 2013
Fig. 5 Effect of ammonia additions on nitrogen and carbon potentials determined using low-carbon steel foil. For three sets of conditions: solid lines, 3 h at 850 °C (1560 °F) and 0.29% CO 2 ; dashed lines, 1 h at 925 °C (1695 °F) and 0.13% CO 2 ; dotted lines, 1 h at 950 °C (1740 °F) and 0.10 More
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Published: 01 August 2013
Fig. 6 Effect of ammonia level on equilibrium carbon and nitrogen content at 925 °C (1695 °F). Source: Ref 11 More
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Published: 01 August 2013
Fig. 9 Effects of ammonia concentration and inlet-gas dewpoint on carbon and nitrogen gradients in a 1020 steel carbonitrided at 845 °C (1550 °F) for 4 h and air cooled. Inlet gas also contained 5% methane; balance, carrier gas. Source: Ref 10 More
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Published: 01 August 2013
Fig. 16 Effect of ammonia content of carbonitriding gas on hardness gradient More
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Published: 01 August 2013
Fig. 17 Effect of ammonia additions on nitrogen content and formation of subsurface voids in foils. (a) 850 °C (1560 °F) 0.29% CO 2 . (b) 925 °C (1695 °F) 0.13% CO 2 . (c) 950 °C (1740 °F) 0.10% CO 2 . Source: Ref 11 More
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Published: 01 August 2013
Fig. 20 Half-life of ammonia in a typical retort furnace with 2.5 m 3 (96.5 ft 3 ) volume at varying temperatures. Source: Ref 32 More
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Published: 01 August 2013
Fig. 21 K N - K CB control ranges at 580 °C (1075 °F) in ammonia/dissociated ammonia atmospheres with indicated addition of carbon gases. Adding CO 2 shows a reversed control behavior; increasing the CO 2 percentage in the process gas results in lower carburizing potentials. Endogas More
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Published: 30 September 2015
Fig. 3(a) Mechanical properties and dimensional change of dissociated ammonia sintered 303L as functions of sintering temperature and sintered density (duration 45 min.) More
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Published: 30 September 2015
Fig. 3(c) Mechanical properties an dimensional change of dissociated ammonia sintered 304L as functions of sintering temperature and sintered density (duration 45 min.) More