Alkali resistance
As alkali-resistant one is metal or a substance called, which in no or almost no base dissolves or is attacked by her.
Many metals, especially gold and platinum , but also corrosion-resistant metals such as tungsten , are alkali-resistant, as they form a protective layer on the surface when they come into contact with alkalis (e.g. caustic soda ), which makes them passivated . They can then no longer corrode and therefore cannot dissolve.
literature
- Horst Scholze: Glass. Nature - structure and properties, third edition, Springer Verlag, Berlin / Heidelberg 1988, ISBN 978-3-662-07496-1 .
- Richard Kieffer, Gerhard Jangg, Peter Ettmayer: Special metals. Metallurgy / production / application, Springer Verlag, Berlin / Heidelberg 1971, ISBN 978-3-7091-3388-0 , pp. 420-421.