|
In chemistry the term zincate may refer to * a salt containing Zn(OH)42−,also called the tetrahydroxozincate ion. It is an ore of Zinc. Examples include calcium zincate CaZn(OH)4.2H2O or Na2Zn(OH)4 or the polymeric anion () in for example NaZn(OH)3· H2O * an alkali solution prepared from dissolving zinc metal, zinc hydroxide or zinc oxide which contains various anionic species such as Zn(OH)42−. Such solutions are used in the plating industry. * an oxide containing zinc and a less electronegative element e.g. Na2ZnO2,(see -ate complex). * a commercially available zinc supplement formulated as zinc sulfate. == Zincate - plating processes == In industry it can refer to the alkaline solutions used in a dipping (immersion) process to plate aluminium with zinc prior to electrolytic or electroless nickel plating. This immersion process is electroless (i.e. not electroplating) and involves the displacement of zinc from zincate by aluminum:〔Glenn O. Mallory, Juan B. Hajdu (1990), Electroless Plating: Fundamentals and Applications, American Electroplaters and Surface Finishers Society, , William Andrew Inc., ISBN 0-936569-07-7〕 :3 Zn(OH)42− + 2 Al → 3 Zn + 2 Al(OH)4− + 4 OH− It can also refer to alkaline solutions used in electroplating of e.g. steel with zinc. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Zincate」の詳細全文を読む スポンサード リンク
|