Table 2: Energy dispersive X-ray analysis from surface of Ti-6Al-4V alloy with nitride coating II after polarization in Tyrode's solution.

Element Areas of energy dispersive X-ray analysis (see Figure 6) No. 1 No. 2 No. 3 No. 4 No. 5 C K — 40.77/69.59 10.59/26.89 — 23.04/48.47 N K 13.93/35.49 — — 9.16/25.54 — O K — 5.06/6.48 11.83/22.56 — 9.88/15.61 Al K 0.30/0.40 0.13/0.10 0.30/0.34 0.34/0.49 0.26/0.24 Cl K 0.72/0.72 4.65/2.69 4.44/3.82 0.61/0.68 2.43/1.73 P K 0.05/0.06 — — — — Ca K 0.03/0.03 — — — — Ti K 84.98/63.31 49.40/21.14 72.84/46.39 89.89/73.9 64.38/33.95

*Numerator: wt%; denominator: at%.