1-20 of 525

Search Results for heavy metal impurities

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003139
EISBN: 978-1-62708-199-3
... Abstract This article discusses the effects of heavy metal impurities, environmental factors, the surface condition (such as as-cast, treated, and painted), and the assembly practice on the corrosion resistance of a magnesium or a magnesium alloy part. It provides information on stress...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006133
EISBN: 978-1-62708-175-7
..., machining and joining processes for tungsten, tungsten heavy alloys, molybdenum, tantalum, niobium, and rhenium components. It describes the various types of metal joining processes, including mechanical fastening, brazing, and welding. brazing joining machining mechanical fastening molybdenum...
Book Chapter

By K.A. Gschneidner, Jr., B.J. Beaudry, J. Capellen
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001089
EISBN: 978-1-62708-162-7
..., industry makes no effort to prepare high-purity metals, alloys, or compounds. The major impurities in the rare earth metals (either research grade or commercial grade) are the interstitial impurities hydrogen, carbon, nitrogen, and oxygen ( Ref 1 ). The other rare earth impurity concentrations...
Book Chapter

By Alfred M. Weisberg
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001253
EISBN: 978-1-62708-170-2
... (a) (a) 12.5 min at 0.3 A/dm 2 (3 A/ft 2 ) gives 100 μin. As with cyanide gold plating, to achieve consistent good color control it is necessary to regulate each chemical and physical variable within its range given in Table 2 . It is also necessary to analyze for metallic impurities and control...
Book Chapter

By R. Terrence Webster
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001441
EISBN: 978-1-62708-173-3
... or reagent methanol, acetone, methyl ethyl ketone (MEK), or the equivalent. If acetone is used, then an alcohol rinse should follow. Heavy mill scale (usually gray in color) should be removed by grinding. The blue surface oxide that develops when the metal is heated above 315 to 425 °C (600 to 800 °F...
Book Chapter

By Thomas A. Phillips
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001053
EISBN: 978-1-62708-161-0
... metal, iron from a blast furnace, and scrap. Oxygen is then blown into the furnace; the oxygen reacts with carbon, impurities, and a small amount of the iron to produce heat, which melts the scrap. Without the scrap, the furnace would have to be cooled by other means. Thus, the use of scrap simplifies...
Book Chapter

By Kenneth H. Eckelmeyer, Steven G. Caldwell
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003166
EISBN: 978-1-62708-199-3
..., and machining chips, saw fines, and grinding residue must be removed frequently from tools and stored submerged in water or oil. Second, heavy-metal poisoning can result if this material is inhaled or ingested. Depleted uranium is roughly as toxic as other heavy metals, such as lead. Inhalation and ingestion...
Book Chapter

By John C. Bittence
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003222
EISBN: 978-1-62708-199-3
... Nearly all others Weight Density can be used to separate some materials ( Table 3 ). In hand-sorting conveyor systems, vibrators with screens use the effects of gravity to sift out the heavier metals in fanning-mill fashion. In heavy-media/sink-float facilities, lighter metals are floated off...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009023
EISBN: 978-1-62708-187-0
... source and must be risered independently. This casting was designed with close tolerances, for aircraft use. Requirements for sound metal and minimum weight necessitated the use of individual risers for all heavy sections, rather than the addition of padding to the ribs or walls, to permit feeding two...
Book Chapter

By Henry Strow
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001255
EISBN: 978-1-62708-170-2
... is the electrodeposition of a thin layer of material; plating times are usually under 1 min.) This type of flash plating is accomplished in both rack plating and barrel plating operations. Heavy brass plate can be buffed to a bright finish or oxidized to a dark finish; dark finishes can be relieved (selectively buffed...
Book Chapter

By R. Terrence Webster
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001084
EISBN: 978-1-62708-162-7
... Abstract Zirconium, hafnium, and titanium are produced from ore that generally is found in a heavy beach sand containing zircon, rutile, and ilmenite. This article discusses the processing methods of these metals, namely, liquid-liquid separation process, distillation separation process...
Book Chapter

By Lou Koehler
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006122
EISBN: 978-1-62708-175-7
... carbonyl gas at ordinary temperatures and then to be restored to a pure metallic state by gentle heating. Production begins with a nickel oxide feedstock. The nickel oxide is continuously fed into a reduction kiln where it is tumbled in a stream of pure hydrogen at ∼230 °C (446 °F) to produce an impure...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003149
EISBN: 978-1-62708-199-3
... systems such as aluminum, copper, magnesium, refractory metal alloys, and titanium alloys as well as superalloys. Metal Processing and Fabrication Processing Zirconium and hafnium are produced from ore that generally is found in a heavy beach sand containing zircon, rutile, and ilmenite. Zircon...
Book Chapter

By A. Sato
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001248
EISBN: 978-1-62708-170-2
... marketed as zinc purifier, is normally required in standard, midcyanide, and occasionally low-cyanide baths, to precipitate heavy metals such as lead and cadmium that may enter the baths as an anode impurity or through drag-in. Standard Cyanide Zinc Baths Standard cyanide zinc baths have a number...
Book Chapter

By Wei-Kan Chu
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001775
EISBN: 978-1-62708-178-8
... Depth profiles of heavy element impurities in a light substrate can be obtained easily using RBS. Figure 7 depicts RBS profiles of arsenic in silicon on three ion-implanted silicon samples, showing the energy spectrum of 2.0-MeV 4 He ions backscattered from a silicon sample implanted with 2 × 10 15...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005307
EISBN: 978-1-62708-187-0
... crucible or ladle. The transport ladle was suspended from an overhead conveyor and filled and emptied by mechanical tipping mechanisms. Only one worker was required. However, the working conditions were far from satisfactory. Manual handling of the metal was heavy, hot, smoky, and dangerous. Furnaces...
Book Chapter

By James K. Hirvonen, Bruce D. Sartwell
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001292
EISBN: 978-1-62708-170-2
... ion source capable of producing heavy metal ion beams of most elements by introducing metal vapor or a volatile compound of the element into the plasma discharge of the ion source. After the positive ions are extracted from the ion source, they are mass analyzed by being passed through a 90° sector...
Book Chapter

By John L. Johnson
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006255
EISBN: 978-1-62708-169-6
... Abstract This article briefly discusses the annealing practices for refractory metals such as tungsten, molybdenum, niobium, tantalum, and rhenium and their alloys. It also presents the applications and properties of these metals and their alloys. annealing microstructure molybdenum...
Book Chapter

By Lin Shao, Wei-Kan Chu
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006637
EISBN: 978-1-62708-213-6
... the scattering angle, a single focusing 90° magnet to bend scattered ions to different trajectories, and a position-sensitive microchannel plate detection system to collect counts as a function of ion landing position. Such a system is able to achieve Angstrom resolution for heavy metal films. Helium ion...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004172
EISBN: 978-1-62708-184-9
... Abstract In a typical semiconductor integrated circuits (SICs) component, corrosion may be observed at the chip level and at the termination area of the lead frames that are plated with a solderable metal or alloy, such as tin and tin-lead alloys that are susceptible to corrosion. This article...