[The corrosion behavior of the bonded alloy Ultratek]

Ultratek crystal has a multiphasic structure; beryllium is concentrated in one phase. Under the influence of the solvent, this phase is attacked and the Be salts are released. Measurement of atom absorption revealed that the amount of beryllium actually released is extremely low. Under the influence of reagents present in the buccal cavity or which come in contact with it, the amount of beryllium is 10(4) times lower (per 1 cm2 free surface metal per day) than the maximal values permitted according to the calculation of an earlier MAC value (maximal concentration for working conditions).