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Ammonium compounds

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230093
EISBN: 978-1-62708-298-3
... maintained at 240 °C (465 °F), the material decomposes by way of two intermediate ammonium compounds: (Eq 8.9) ( NH 4 ) 2 BeF 4 → NH 4 BeF 3 → NH 4 Be 2 F 5 → BeF 2 Several other versions of a stagewise decomposition have...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230117
EISBN: 978-1-62708-298-3
... or bases), forming ammonium and beryllium salts in solution. Hot pressing mixtures of beryllium nitride and silicon nitride, Si 3 N 4 , at 1700 °C (3090 °F) produces beryllium silicon nitride, BeSiN 2 . This compound is chemically inert and may have potential use as a ceramic material. 10.10 Beryllium...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230071
EISBN: 978-1-62708-298-3
... Many processes have been suggested for separating aluminum, iron, and other heavy metals from beryllium sulfate. Reaction with ammonium or potassium sulfate to form an alum is the process predominantly used by beryllium manufacturers. Granular beryllium hydroxide is precipitated by boiling beryllium...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900065
EISBN: 978-1-62708-350-8
... A drop of cupric ammonium chloride, Cu(NH 4 Cl) 2 , as a spot test on the surface of a nitrided part will indicate the presence of the white layer. If there is a white layer (or any remaining white layer after grinding or chemical finishing), the drop will deposit copper onto the surface...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.9781627082815
EISBN: 978-1-62708-281-5
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780433
EISBN: 978-1-62708-281-5
... length critical crack length initial crack size acrylonitrile-butadiene-styrene acetals Auger electron spectroscopy aramid ber American National Standards Institute ammonium polyphosphate American Society for Testing and Materials alumina trihydrate thickness butadiene bulk molding compound Building...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560453
EISBN: 978-1-62708-291-4
... that is deposited on the surface. Reference 1. Fine L. , Met. Prog. , 1946 , 49 ( 1 ), 108 10.2307/3922518 . Ammonium Persulfate Composition Method of Use Immerse at room temperature. Remove black surface deposit by swabbing under water. Wash and dry Use...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230107
EISBN: 978-1-62708-298-3
.... colorimetric methods fluorometric methods gravimetric methods polarographic methods radiometric methods spectrometric methods volumetric methods BERYLLIUM belongs to the ammonium hydroxide analytical group. Beryllium is completely precipitated by ammonia, along with iron, aluminum, and chromium...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1984
DOI: 10.31399/asm.tb.mpp.t67850509
EISBN: 978-1-62708-260-0
... part H 2 0 40 g FeCl, 13 g cupric ammonium chloride 1000 mL H 2 0 Very vigorous (Van Lancker). Hume-Rothery etch. Good for high-Si alloys. Use ground surface. Immerse sample 5-10 s, brush off copper deposit or dip in a 1:1 solution of HNO, and H20. Cone. Keller's etch. Dip in HN03 to remove smut...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900219
EISBN: 978-1-62708-350-8
... will quickly become blocked with heavy deposits of ammonium carbamate.) Fig. 3 Furnace load of crankshafts Fig. 4 Schematic diagram of the Wild Barfield pit carburizing furnace used in the nitrocarburizing trials With a furnace volume of 2 m 3 (70 ft 3 ), the standard purge atmosphere...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900053
EISBN: 978-1-62708-350-8
... the volume reaches approximately 25 mL. Allow to cool. This digestion drives off all the cyanide nitrogen as hydrogen cyanide and fixes the cyanate nitrogen as ammonium bisulfate or ammonium sulfate. Add 350 mL of ammonia-free distilled water and 50 mL of ammonia-free 72% sodium hydroxide to the digested...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910021
EISBN: 978-1-62708-250-1
... of ionization, and these compounds dissociate to a large degree, forming ions in solution. Boric acid and ammonium hydroxide have low degrees of ionization and form fewer ions in solution. This accounts for hydrochloric acid and potassium hydroxide being a strong acid and a strong base, respectively. Degree...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720161
EISBN: 978-1-62708-305-8
...-C, and Mn-Cr steels Beraha’s reagent II Stock solution A 1 vol. HCl (35%) + 5 vol. distilled water Stock solution B 1 vol. HCl (35%) + 2 vol. distilled water Stock solution C 1 vol. HCl (35%) + 1 vol. distilled water Stock solution D 20 g ammonium bifluoride dissolved in 1000 mL of stock...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1984
DOI: 10.31399/asm.tb.mpp.t67850610
EISBN: 978-1-62708-260-0
... polarized light. Color etchants 28. 200 g C r O , 20 g sodium sulfate 17 mL HC1 1000 mL water 29. 100 mL water 10 mL HF 30. 20 mL water 20 mL H N O , 3 g ammonium molybdate 31. 5 g ammonium molybdate 10 g sodium thiosulfate 20 mL ammonia (0.91 density) 200 mL water Beraha's tint etch. Preetch sample with 10...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1984
DOI: 10.31399/asm.tb.mpp.t67850712
EISBN: 978-1-62708-260-0
... (0001) (0001) (1010) (111) (112) All {100} jiooljiii lioo} 1111} Cu Cu Cu-30%Zn alloy 70 g ammonium persulfate 0.5 g ammonium chloride (in 100 mL NH4OH) 0.5-2 parts bromine 7.5-45 parts acetic acid 12.5-75 parts HC1 90 parts water Solution a 2 parts H3P04 4 parts methanol 3 parts H 2 0 Solution b 70% aq...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430379
EISBN: 978-1-62708-253-2
... in the cation exchange column of the ion exchange unit. For instance, bicarbonate ions from sodium bicarbonate in water can be exchanged with OH – anions using an anionic exchange resin such as styrene-divinylbenzene with a quaternary ammonium group. The resins used in ion exchange plants consist of cross...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030292
EISBN: 978-1-62708-282-2
... chromium or molybdenum can be attacked and embrittled by sulfur-bearing gases (sulfidic attack) and sour water solutions (ammonium bisulfide corrosion) at elevated temperatures. Alloy 400 (N04400), a nickel-copper alloy, is extensively used as a lining for carbon steel equipment to prevent corrosion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1984
DOI: 10.31399/asm.tb.mpp.t67850543
EISBN: 978-1-62708-260-0
... in 1:1 solution of ethyl alcohol and water Alumina abrasive 75 mL water 15 g 0.05-u.m alumina 1 g CrO, 5% C r 0 3 in water Alumina abrasive Aq. ammonium persulfate 10-15 g/L (for copper) 15-30 g/L (for brass) MgO abrasive 2-10% C r 0 3 in water Rouge or alumina abrasives 1% ferric nitrate in water...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430290
EISBN: 978-1-62708-253-2
... tips and thinned rupture contours. (b) Transverse sectional view near failure location showing thinning because of metal wastage essentially from outer surface In order to determine the seamless nature of the tube, a sample was cut in a transverse direction followed by etching with 10% ammonium...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030209
EISBN: 978-1-62708-282-2
... chloride are produced. High-temperature sulfidation and hydrogen attack, ammonium bisulfide corrosion, underdeposit corrosion, and chloride stress cracking have all been identified ( Ref 6 , 7 ). Amine Sweetening Units Amine sweetening units are used to remove acid gases, primarily hydrogen sulfide...