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silver tarnish

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Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004173
EISBN: 978-1-62708-184-9
.... 25 Corner of failed surface-mounted thick-film chip resistor showing tarnished silver. Courtesy of Steve Axtell, Vishay Fig. 26 Scanning electron micrograph of cross section through termination region of failed surface-mounted thick-film chip resistor. Courtesy of Steve Axtell, Vishay...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004140
EISBN: 978-1-62708-184-9
... fabrics corrode at their contact points after only a few months of exposure ( Ref 7 ). The rapid corrosion of a steel artifact in contact with a dyed yellow fabric was attributed to the inclusion of a halide salt in the dye ( Ref 8 ). Example 1: Tarnish of Hellenistic Silver Bowls by Use of Sulfur-Laden...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003829
EISBN: 978-1-62708-183-2
... Nostrand , 1917 , p 304 – 309 13. Bernard M.C. et al. , Reduction of Silver Tarnishing and Protection against Subsequent Corrosion , Corros. Sci. , in press 10.1016/j.corsci.2004.07.015 14. Mezger P.R. et al. , The Corrosion Behaviour of Palladium-Silver-Ceramic Alloys...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004209
EISBN: 978-1-62708-184-9
..., and implant alloys. The effects of composition and microstructure on the corrosion of each alloy group are also discussed. The article concludes with information on the tarnishing and corrosion behavior of these alloys. corrosion dental alloys microstructure metal alloys wrought wire alloys...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001309
EISBN: 978-1-62708-170-2
... a limited solubility in sulfuric acid. Heavy scaling of these alloys should be avoided during annealing by using a reducing atmosphere. For example, the annealing of 18% nickel silver in a rich reducing atmosphere results in a slight tarnish that is easily removed in the sulfuric acid pickle and dichromate...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001460
EISBN: 978-1-62708-173-3
... by a tarnish layer caused by a reaction with sulfur in the air. The resulting sulfide film causes the solderability to deteriorate with time of exposure. Silver coatings need to be removed just like the gold coatings to prevent embrittlement of the solder joint by silver-tin intermetallic formation. A hot...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003150
EISBN: 978-1-62708-199-3
...., to tarnish). This combination of properties has given gold and its alloys traditional applications in the jewelry and dental fields as well as a number of important industrial uses. THE PRECIOUS METALS include silver, gold, and the six platinum-group metals—platinum, palladium, ruthenium, rhodium, osmium...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001088
EISBN: 978-1-62708-162-7
... of tarnishing of silver in indoor atmosphere is determined by the supply of sulfur atoms, because the coating is nonprotective. This sulfide decreases the reflectivity of silver and also increases the electrical contact resistance, particularly at low currents, because it is nonohmic in character. The rate...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003157
EISBN: 978-1-62708-199-3
... by alloying with copper, silver, palladium, and platinum, but usage is necessarily restricted to low-current applications because of the low melting point. Properties of gold and its alloys are listed in Table 3 . If low tarnish rates and low contact resistance are to be preserved, the gold content...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001459
EISBN: 978-1-62708-173-3
... Molybdenum Silver Nickel-silver Steel Tungsten Palladium Zinc Beryllium Copper Source: Ref 21 The solderability of marginal materials (nickel, beryllium-copper, steels, or heavily tarnished copper) can be improved by the use of stronger fluxes. However, the highly corrosive...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003211
EISBN: 978-1-62708-199-3
... composition and properties. When tin-lead solders are referred to, the tin contant is customarily given first—for example, 40%Sn-60%Pb. Table 1 lists compositions of tin-lead solders as well as those of Sn-Pb-Sb, Sn-Pb-Ag, and lead-silver solder compositions. ASTM B 32 specification for tin-lead, Sn-Pb-Sb...
Book Chapter

Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001087
EISBN: 978-1-62708-162-7
... can be found in Ref 9 and 10 , and in the article “Tarnish and Corrosion of Dental Alloys” in Corrosion, Volume 13 of ASM Handbook, formerly 9th Edition Metals Handbook. In recent years, the United States has been a net importer of silver. Imports, including unrefined silver, supplied...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001097
EISBN: 978-1-62708-162-7
...Properties of silver metals used for electrical contacts Table 4 Properties of silver metals used for electrical contacts Alloy Solidus temperature Electrical conductivity, % IACS Hardness, HR15T Tensile strength Density, g/cm 3 Elongation in 50 mm or 2 in., % Annealed Cold...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003211
EISBN: 978-1-62708-199-3
... by the solderability of the base materials to be joined. The solderability of metals and alloys is not simply a matter of chemical nobility, as might be supposed when regarding the good solderability of the noble metals, which do not readily form oxide or tarnish films. Although cadmium and tin both form oxides...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001307
EISBN: 978-1-62708-170-2
...Abstract Abstract This article describes the methods for removing metallic contaminants, tarnish, and scale resulting from hot-working or heat-treating operations on nickel-, cobalt-, and iron-base heat-resistant alloys. It provides a brief description of applicable finishing and coating...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003220
EISBN: 978-1-62708-199-3
... including metallic contaminant removal, tarnish removal, oxide and scale removal, finishing, and coating processes. abrasive blast cleaning coating process electropolishing heat-resistant alloys passivation salt bath descaling stainless steel surface treatment tarnish removal...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003220
EISBN: 978-1-62708-199-3
...-resistant alloys including metallic contaminant removal, tarnish removal, oxide and scale removal, finishing, and coating processes. abrasive blast cleaning coating process electropolishing heat-resistant alloys passivation salt bath descaling stainless steel surface treatment tarnish removal...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005670
EISBN: 978-1-62708-198-6
... but have historically not been used because of low tarnish resistance in the oral environment ( Ref 1 ). However, it is commonly used as an alloying element in both gold- and palladium-base dental alloy systems. Silver is also a major component of dental amalgam alloys. In 1987, 1.12% of the U.S...
Book Chapter

By Alan Blair
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001252
EISBN: 978-1-62708-170-2
...), or bright (type III), and with chromate film for added tarnish resistance (grade A), or with no film (grade B). A minimum thickness of 13 μm (0.0005 in.) is required for functional coatings. ASTM B 700 specifies electrodeposited coatings of silver for engineering uses and defines purity (types 1, 2...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004170
EISBN: 978-1-62708-184-9
.... Soc. , Vol 123 , 1976 , p 143 10.1149/1.2132749 50. Shreir L.L. , Jarman R.A. , and Burstein G.T. , Corrosion , Vol 1 , 3rd ed. , Butterworth-Heinemann , 1994 , p 6:8 – 11 51. Qiu J.H. , “Tarnishing of Silver: Causes and Prevention,” Coinformation, MITA (P...