Image from page 24 of “Typical cases of the deterioration of Muntz metal (60:40 brass) by selective corrosion” (1917)

June 1st, 2016

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Image from page 24 of “Typical cases of the deterioration of Muntz metal (60:40 brass) by selective corrosion” (1917)
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Identifier: typicalcasesofde01rawd
Title: Typical cases of the deterioration of Muntz metal (60:40 brass) by selective corrosion
Year: 1917 (1910s)
Authors: Rawdon, Henry S., 1880-
Subjects: Brass Corrosion and anti-corrosives
Publisher: Washington : Govt. Print. Off.
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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Text Appearing Before Image:
d EiG. 12.—Illustration of various conditions affecting dezi,. ~ification (0-6) Samples of Muntz metal which were in contact with copper while immerse, n sodium chloridesolution. In a the wire was inserted in the central hole; in b it was wrapped a_ound the sample.The attack is immediately adjacent to the copper wire. (X 2). (c) Muntz metal sample which has been immersed in 5 per cent sodium chloride solution. The dark spots are corroded areas which formed beneath adhering deposits of basic zinc chloride. (X2.)unetched. (d) Cross section of one of the spots shown in c. (X500.) Etching, ammonium hydroxide and hydrogen peroxide. The dark band is the basic zinc chloride deposit which accelerated the attack of the metalbeneath. A copper layer, shown in the upper two corners, was deposited in the sample to protectthe edge of the specimen during the polishing. Deterioration of Muntz Metal 21

Text Appearing After Image:
a

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