• 기술사
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• 제33권6호
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• pp.16-23
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• 2000

Anodizing processes is the conversion of the aluminum surface to aluminum oxide while the part is the anode in an electrolytic cell. The object of the anodizing was increased corrosion resistant, paint adhesion and was provided unique, decorative colors. Many electrolytes, under different conditions, have been used for the anodic oxidation of alumminum and its alloys. This paper deals with the procedures used in the anodic oxidation of aluminum and its alloys, the nature and properties of the oxide films, their uses and anodizing equipment and process control.

• 한국해양공학회지
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• 제10권1호
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• pp.36-46
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• 1996

This paper deals with determinig the proper friction welding condition and analyzing various mechanical properties of friction welded joints of sintered carbide tool materials(K20, P25, and SKDX5 for the blade part of drill or press punch) to alloy steel (SKH4, SCM440 for the shank part of drill or press punch), the alloy steel to aluminum(A6061 for the interlayer material between the blade part and the shank) and sintered carbide tool materials to alumminum. And also acoustic emission test will be carried out during fiction welding to evaluate the weld quality.

• 한국환경과학회지
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• 제19권12호
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• pp.1355-1359
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• 2010

The application of metal caps has been continuously increased as real life are extended. Metal caps is usually made of aluminum and polyethylene(PE) as packing. Since metal caps contain 75% aluminum on a weight basis, metal caps may be a valuable source when these were properly recovered. The recovery methods of metal caps have mechanical peeling and incineration. However these are either hard to apply in some case or environmentally unacceptable. So in this investigation, recovery method of aluminum from metal caps was investigated using pyrolysis. The result shows that pyrolysis temperature and pyrolysis time was $450^{\circ}C$ and 120min. respectively. Also 100% of aluminum was recovered from metal caps. Heat content of recovered oil was high enough to use as a fuel representing 7,425.0, 7,793.1, 7,583.2, 7,726.2(cal/g). Heavy metal contens in the oil were under regulatory limit indicating.