Biomedical Engineering Reference
In-Depth Information
316L steel and additionally, the bioactive glass coated 316L show
more pitting corrosion resistance in comparison with uncoated
steel. The deposited coating is useful in improvement of bio-
compatibility and stronger bone bonding too.
Figure 5.33
SEM image of a cross-section bioactive glass coating on the
316L substrate [5].
Table 5.13
Mean values (standard deviation) of corrosion current
densities and corrosion potentials of the bioactive glass coated
and uncoated 316L stainless steel in normal saline solution
at 37°C [5]
I
corr
(nA/cm
2
)
Tafel Linear
Pristine 316L SS -174 ± 20 265 (16) 194 (16)
Bioactive glass coated 316L SS -220 ± 20 85 (6)
Material
E
corr
(mV)
50 (8)
Table 5.14
Mean values (standard deviation) of corrosion current
densities and corrosion potentials of the bioactive glass coated
and uncoated 316L stainless steel in Ringer's solution at
37°C [5].
I
corr
(nA/cm
2
)
Tafel Linear
Pristine 316L SS -195 ± 20 218 (17) 181 (20)
Bioactive glass coated 316L SS -204 ± 20 78 (7)
Material
E
corr
(mV)
59 (8)
The results presented in this chapter indicates, that nano-
crystalline bulk materials have slightly lower corrosion resistance,
