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123:, toys, or radios, because rare or otherwise valuable items can inescapably be rendered worthless as the process of zinc pest destroys them. Because castings of the same object were usually made from various batches of metal over the production process, some examples of a given toy or model may survive today completely unaffected, while other identical examples may have completely disintegrated. It has also affected carburetors, hubcaps, door handles and automobile trim on cars of the 1920s and 1930s.
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that makes the object exceedingly brittle and prone to fracture, and can eventually shatter the object, destroying it altogether. Due to the expansion process, attached normal material may also be damaged. The occurrence and severity of zinc pest in articles made of susceptible zinc alloys depends
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alloys in 1929 using 99.99% pure zinc metal to avoid the problem, and articles made after 1960 are usually considered free of the risk of zinc pest since the use of purer materials and more controlled manufacturing conditions make zinc pest degradation unlikely.
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Affected objects may show surface irregularities such as small cracks and fractures, blisters or pitting. Over time, the material slowly expands, cracking, buckling and warping in an
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Since the 1940s, some model railroad hobbyists have claimed, with varying degrees of success, that a method of "pickling" zinc alloy parts by soaking them in
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Engine parts of older vehicles or airplanes, and military medals made of zinc alloys, may also be affected. In addition, the post-1982 copper-plated zinc
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both on the concentration of lead impurities in the metal and on the storage conditions of the article in the ensuing decades. Zinc pest is dreaded by
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containing lead impurities. While impurities of the alloy are the primary cause of the problem, environmental conditions such as high
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solution for several minutes before painting and assembling them could prevent or delay the effects of zinc pest.
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liners of equal age and storage history, one is badly affected, the other is not.
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Stephen D. Cramer; Bernard S. Covino, Jr; Charles
Moosbrugger, eds. (2005).
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Prepared under the direction of the ASM International
Handbook Committee.
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zinc articles that were manufactured during the 1920s through 1950s. The
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It was first discovered to be a problem in 1923, and primarily affects
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Corrosion-induced cracking of model train zinc-aluminium die castings
194:. Vol. 13B Corrosion: Materials. ASM International. p. 37.
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253:, National Aerospace Laboratory NLR, NLR-TP-2005-205, archived from
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model railroad car 344.6 (H0, 1947..1949), affected by zinc pest
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88:(greater than 65%) may accelerate the process.
244:Wanhill, R.J.H.; Hattenberg, T. (May 2005),
50:aircraft, completely fragmented by zinc pest
148:, and is also different from a superficial
223:. Vol. Band 1. Verlag Joachim Koll.
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73:, is a destructive, intercrystalline
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156:") that affects some zinc articles.
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141:have been known to be affected.
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61:"zinc plague"), also known as
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144:Zinc pest is not related to
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16:Type of corrosion in zinc
97:New Jersey Zinc Company
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152:oxidation process ("
109:irreversible process
221:Koll's Preiskatalog
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219:Koll, J. (2001).
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23:The wheels of a
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150:white corrosion
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260:on 2011-07-16.
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166:Bronze disease
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139:Lincoln cents
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57:(from German
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255:the original
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191:ASM Handbook
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121:model trains
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132:oxalic acid
116:of vintage
77:process of
272:Categories
172:References
114:collectors
99:developed
37:Dinky Toys
35:Two 1930s
283:Corrosion
154:Weissrost
75:corrosion
71:zamak rot
67:mazak rot
55:Zinc pest
48:Dinky Toy
160:See also
146:tin pest
118:die-cast
93:die-cast
86:humidity
63:zinc rot
59:Zinkpest
128:vinegar
25:Märklin
227:
198:
82:alloys
258:(PDF)
251:(PDF)
101:zamak
278:Zinc
225:ISBN
196:ISBN
79:zinc
69:and
130:or
274::
211:^
180:^
65:,
233:.
204:.
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