日本金属学会誌

J. Japan Inst. Metals, Vol. 67, No. 11 (2003),
pp. 661-667

Microstructures and Corrosion Behavior of Tin Thread Made in the Late Edo Period

Masahiro Kitada

Graduate School of Fine Arts, Tokyo National University of Fine Arts and Music, Tokyo 110-8714

Abstract:

The microstructures and corrosion behavior of tin thread made in the late Edo period have been investigated. Specimens are obtained from brocades made using the tin thread and from a sample book of tin brocade. Reflectance is measured with a spectrophotometer. Fine structures are observed using a transmission electron microscope. An X-ray diffractometer and X-ray photospectrometer are used to identify corrosive matter. Sn foil glued on Japanese paper shows a brownish black color spectrum. The thickness of the corroded Sn foil is 8 ~ 10 μm. SnO2, SnO, and Sn3O2(OH)2 are detected in the corroded Sn foil. The top layer consists of the most stable SnO2, and there is a SnO layer beneath the SnO2 layer. A Sn3O2(OH)2 layer exists between the SnO layer and the unreacted Sn layer. From these results, corrosion has been promoted in the order of Sn3O2(OH)2, SnO and SnO2.


(Received June 20, 2003)

Keywords:

tin thread, Edo-period, corrosion, SnO , SnO, Sn3O2(OH)2


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