Table 1.

EDS spectra of the coatings on AZ31 Mg alloy, at.%.

Spectrum	C	O	P	Ca	Mg	Ca/P ratio
Point A	13.59	65.51	11.61	9.1	0.19	0.78
Point B	12.49	70.04	9.75	7.49	0.23	0.77
Point C	11.89	64.39	13.21	10.37	0.15	0.79
Point D	14.57	65.57	9.93	8.94	0.99	0.90
Point E	9.47	62.79	14.70	12.86	0.18	0.87
Point F	10.09	55.09	15.65	16.67	1.50	1.07