CORROSION BEHAVIOUR OF ZAMAK COMPONENTS IN A HEARING AID

This paper represents a study case of a contact lamella of Zamak alloy. The contact lamella came from a behind hearing aid device, that was in a harsh environment, with high humidity and elevated temperatures, often combined with increased levels of perspiration from the user and earwax that impair his functionality. On contact lamella made from Zamak was defined the corrosion factor, represented very well in the figures of this paper. By stereomacroscopic analysis and scanning electron microscope analysis there are put in evidence main structural characteristic of the surface after using about 6 years, respectively both corrosion products and corrosion surface.