China bronze statue in the Eyes of the Experts and Archeologists

Modern metallurgy confirmed tin, tin has three allotropes: gray tin (α_Sn), white tin (β_Sn) and brittle tin (γ_Sn). Three kinds of allotrope of the body, with different characters are not the same temperature. Peng Yung autumn book "tin alloy" had this way: people rarely seen white tin, white tin to one hundred in one p.m. 61 degrees between the second is stable, then less than one p.m. second began to change as gray tin, but its very slow. The entire bronze sculpture is intricate in the decorations. When too cold minus 30 degrees, changing the maximum speed. Gray tin with scattered small spots first appear on the surface of white tin, with decreasing temperature, the entire surface covered with spots gradually expanded, along with block tin crumbled into powder, a phenomenon called "tin plague."

LI Huai Tong said that the ancient bronze mirror with a mysterious tin surface treatment of the whole procedure: Let the white tin in one p.m. temperatures below second place in the loop mirror, "tin plague" into gray tin powder, dipped in white felt This powdery gray tin bronze mirror of the friction process, the mirror-mirror back evenly covered with gray tin, this layer of tin oxide formed naturally gray tin oxide or tin oxide crystalline films. On the casting technique, the bronze statue employs the rather advanced three-tier patterns cast at once. Whether this is a layer of tin oxide film, or tin dioxide, showed acidic, are inert, that is very difficult to play a role in acid-base, and thus have a good anti-corrosion properties. This is thousands of years of the Han Dynasty bronze mirror the real cause of corrosion does not occur.

The same ancient bronze mirror, why have ink (black old) and silver (mercury ancient) of the points, LI Huai Tong said, with modern metallurgical science to explain, is not difficult: the ancient mirror really "animated by mysterious tin , "then formed on the surface of the tin bronze mirror, should naturally form a tin oxide or tin oxide film. Modern science tells us: a black cubic crystals of tin oxide, tin dioxide is a white square crystal. The former is easily oxidized in air heated to the latter. The round thunder grounding of the chinese bronze sculpture produces a strong three-dimensional touch in contrast. Tin dioxide tin can mountain metal is heated in air to the system. Here we should pay particular attention, a tin oxide and tin dioxide, though only one word, its hue is a black and white, the opposite. The former is black crystals, which is white crystal, which should be black ancient china bronze sculpture mirror of the ancient hue and mercury to form the inner reason.

Bronze powder rust occurred on Fair department is very troublesome thing, the long-term unresolved. This rust in bronze on the first occurrence in a powdery spots, and then gradually expand the spread, and finally all the bronze corrosion damage can sometimes adversely affect the surrounding bronze was similar rust disease. No matter from which angle, the viewer is able to watch the intact decorative effect of the china bronze sculpture. This rust is often important in the early Bronze Age, is a big cultural harm. National Palace Museum has this listed as national key scientific research projects, take off fire, disinfection, quarantine and other measures to save the bronze disease occurrence, but are invalid. Therefore, we have called this powdery rust rust cancer.