Commonly coated in polymer to provide chemical inertness; occasionally glass will be the coating for use with most liquid alkali metals and alkali metal solutions in ammonia. Both of these coatings are inert and will not contaminate or react with the reaction solution.
PTFE. High magnetic strength and long life due to Alnico V magnetic cores, fully encapsulated with high-grade PTFE. Strict quality control ensures the magnetic strength, position of the magnetic core,surface quality, crack resistance, and uniform thickness of the PTFE coating. Maximum operating temperature 270 °C.
Rough vessel surfaces or abrasive sediments can quickly deteriorate the PTFE coating and thus shorten the life of stirring bars. This can be prevented by using reduced contact surface (e.g., with pivot ring) stirring bars.
Storing conditions:To prevent demagnetisation stirring bars using Alnico V magnetic cores should not be stored in a random mass but should be kept “paired” and should not be dropped on hard or steel surfaces.
Post time: Dec-19-2017