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heavy metal impurities

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Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003139
EISBN: 978-1-62708-199-3
... and contaminant metals on the corrosion rate of magnesium as determined by alternate immersion in 3% NaCl solution Abstract 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...
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
..., 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 Midcyanide Zinc Baths Low-Cyanide Zinc Baths Microcyanide Zinc Baths Bath may be prepared...
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
... into plates. Secondary operations are required to fabricate more complex refractory metal components. This article discusses two such secondary operations, namely, machining and joining processes for tungsten, tungsten heavy alloys, molybdenum, tantalum, niobium, and rhenium components. It describes...
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
.... Jr. , Preparation and Purification of Rare Earth Metals and Effect of Impurities on Their Properties , in Science and Technology of Rare Earth Materials , Subbarao E.C. and Wallace W.E. , Ed., Academic Press , 1980 , p 25 – 47 10.1016/B978-0-12-675640-1.50007-6 2...
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
... and physical variable within its range given in Table 2 . It is also necessary to analyze for metallic impurities and control their concentrations. Drag-in of metallic impurities can have a disastrous effect on color control. Sulfite gold plating solutions ( Table 3 ) have several unique and advantageous...
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
... charge to a BOF is comprised of hot 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...
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

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
.... There do not seem to be any reported problems with residual impurities in either pure materials or re-alloyed materials produced from PM-containing scrap. For example, because the precious metals are highly purified before reuse, palladium-nickel alloy for relay contacts can be produced from either...
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
... using degreasing solvents 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...
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 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...
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
... 50 50 50 50 80 50 30 50 30 80 Note: 1) The content of Ni is calculated by the subtraction method, the subtraction elements are other metals, C and S. 2) Grade a: Maximum content of impurities ≤0.05%; The single impurity of each element ≤0.005%; Grade b Maximum content of impurities...
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
... impurities of heavy elements on substrates of lighter elements. This article focuses on RBS and its principles, such as collision kinematics, scattering cross section, and energy loss. It describes the channeling effect and the operation of the RBS equipment. The article also provides information...
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
... (oz/gal) 10 (1.3) 7.5 (1.0) Sodium carbonate, g/L (oz/gal) 10 (1.3) 10 (1.3) Sodium bicarbonate, g/L (oz/gal) 7.5 (1.0) 7.5 (1.0) Ammonia (aqua), % 0.5 0.1 Analysis “Total” sodium cyanide, g/L (oz/gal) 22 (2.9) 33 (4.4) Copper (as metal), g/L (oz/gal) 23 (3.1) 22 (2.9...
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
... are essential alloying elements in other metal systems such as aluminum, copper, magnesium, refractory metal alloys, and titanium alloys as well as superalloys. Zirconium and hafnium are produced from ore that generally is found in a heavy beach sand containing zircon, rutile, and ilmenite. Zircon, which...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003166
EISBN: 978-1-62708-199-3
... Tungsten 19.3 Precious metals (gold, platinum, rhenium) 19.3–19.7 Density of lead = 11.35 g/cm 3 Typical properties for the tungsten heavy alloy W-4.9Ni-2.1Fe Table 3 Typical properties for the tungsten heavy alloy W-4.9Ni-2.1Fe Condition Ultimate tensile strength Elongation...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001079
EISBN: 978-1-62708-162-7
... by sintering and/or melting. The process for niobium differs only in that the metal is most commonly reduced by aluminothermic reduction of oxide. In this process, oxide impurities slag from the molten niobium. For tantalum and niobium, electron beam (EB) melting is widely used for further purification...
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
... 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 are frequently an integral part of the die...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003144
EISBN: 978-1-62708-199-3
... coating for added corrosion protection. Electroplated zinc is also often painted. Improved corrosion resistance can also be obtained by plating with zinc-iron, zinc-nickel, and zinc-cobalt alloys. Thermal spraying, also known as metallizing, is used in applications where heavy coatings (75 to 180 μm...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001077
EISBN: 978-1-62708-162-7
..., formability, weldability, and paintability are critical properties for automotive applications of electrogalvanized steel. Metallizing Metallizing, also known as thermal spraying, is used in applications where heavy coatings are specified for corrosion protection. The process is amenable to field...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001118
EISBN: 978-1-62708-162-7
...: International Lead-Zinc Study Group Typical chemical composition of EAF dust Table 8 Typical chemical composition of EAF dust Constituent Amount, % Valuable metals Zinc 5.0–37.8 Iron 13.0–44.0 Problem impurities Lead 0.7–7.0 Cadmium 0.01–0.16 Nickel 0.002–0.07...