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Showing posts from January, 2009

Electropolishing in Anodizing

Electropolishing is a treatment of aluminum using electric current in a chemical solution. The chemicals solution can be different for more detail can see on Electropolishing of Aluminum. Electropolishing is make the surface of aluminum is open, the pore of oxide film that already stay on the surface of aluminum oxide will remove and open. Oxide film surface can be formed in transportation or keeping in the store or just exposed to air. So the purpose of electropolishing is opening the oxide film surface on the aluminum surface.

To give more detail about electropolishing can see on the picture diagram how this process applied. Basically use electric current to open the surface of oxide film on aluminum surface. Here are the list detail process of electropolishing:
The Scheme of ElectropolishingElectropolishing DefinitionElectropolishing BathArticle Supported

Wood-Adhesive or Wood-Glue or Wood-Resin

Wood glue can be from urea formaldehyde resin or from melamine formaldehyde resin. All this resin have thermosetting resin characteristic. Thermosetting mean that this resin can be changed the characteristic after passing the limit of temperature or limit of time to set. After passing the limit of curing time, this resin can't be back again their characteristic into the beginning, this character is different with thermoplastic resin. Thermoplastic resin can be proceed into the beginning characteristic and can be formed as we want like new plastic, even the quality is not as good as the pure of thermoplastic resin.

Urea formaldehyde already use as wood glue because this resin have double benefit as wood glue. The first benefit of urea formaldehyde resin of course can use as glue. The second benefit of this resin can use as wood preservative agent, because contain of formalin that seep into the wood. With the presence of this formalin then all types of microorganisms do not want to e…