Table 5 Corrosion parameters of Ti-6Al-4V substrate, and prepared coatings.

From: Effect of cobalt ions doping on morphology and electrochemical properties of hydroxyapatite coatings for biomedical applications

Sample

Ecorr (mV vs. Ag/AgCl)

icorr (nA/cm2)

Ba (mV/dec)

Bc (mV/dec)

Rp (MΩ × cm2)

η (%)

Ti-6Al-4V

-396.61

118.65

127.03

112.30

0.218

–

Pure HA

-198.82

57.43

115.77

107.44

0.421

48.21

HA/T

-274.13

34.29

110.98

96.60

0.654

66.66

5Co/HA/T

-307.93

9.72

122.75

62.89

1.858

88.26

10Co/HA/T

-215.36

1.38

126.20

74.37

14.706

98.51

20Co/HA/T

-204.71

3.85

111.02

77.58

5.150

95.76

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