Biomedical Engineering Reference
In-Depth Information
enhances the materials removal. This type of corrosion
includes both cavitation and fretting corrosion.
(viii) Hydrogen corrosion occurs in the hydrogen atmosphere
or in the presence of internal hydrides deteriorating metal
properties, enhancing metal brittleness.
(ix) Stress-corrosion occurs together with cracking. This type of
corrosion is caused by the simultaneous presence of tensile
stress and corrosive medium, resulting in both mechanical
properties deterioration and materials removal.
Figure 5.2
Schematic representation of various forms of corrosion [51].
Example images of pitting and crevice corrosion in Ti is shown in
Fig. 5.3 and Fig. 5.4 [2]. The corrosion behavior can be determined
by time-consuming gravimetric method, when the corrosion rate is
estimated after a longtime material dipping in corrosive solution/
