Table 1.

Statistical analysis by Kruskal–Wallis test for the chemical composition (wt %) of wear particles detached during wear corrosion tests of CoCr samples in PBS (condition number 1), PBS+ 3 g/L HA (condition number 2) and under anodic potentiodynamic polarization (condition number 3), where n is the number of samples, mean is the average value, SD is the standard deviation, C25 is the value of the 25% of the data, C75 is the value of the 75% of the data, and p * is the significant difference at 0.95 confidence level.

	Condition Number	n	Mean	SD	Minimum	Maximum	C25	Median	C75	p *
Cr	1	7	33.28	6.92	21.61	43.13	29.33	34.38	38.45
	2	24	28.53	8.73	14.06	48.82	21.28	27.52	33.66	0.034
	3	7	39.09	11.02	22.34	57.01	33.65	37.60	47.67
Co	1	7	4.31	6.02	0.00	13.81	0.00	0.00	11.54
	2	24	7.73	16.94	0.00	54.07	0.00	0.00	5.99	0.001
	3	7	36.08	17.59	15.14	58.64	17.57	32.12	51.48
Mo	1	7	0.00	0.00	0.00	0.00	0.00	0.00	0.00
	2	24	0.45	1.54	0.00	5.63	0.00	0.00	0.00	0.006
	3	7	2.71	2.60	0.00	5.48	0.00	4.00	5.45
P	1	7	18.59	5.02	11.46	26.36	15.76	16.87	23.16
	2	24	14.11	5.90	0.96	27.48	11.64	13.24	17.83	0.051
	3	7	9.40	7.30	1.30	19.57	1.89	8.79	16.10
Al	1	7	1.52	4.01	0.00	10.62	0.00	0.00	0.00
	2	24	0.18	0.68	0.00	3.17	0.00	0.00	0.00	0.123
	3	7	0.76	1.06	0.00	2.57	0.00	0.00	1.85
O	1	7	40.10	10.67	23.79	54.36	33.72	41.31	51.57
	2	24	41.82	17.72	3.52	72.84	34.64	49.54	51.69	0.002
	3	7	10.91	7.03	3.76	23.11	4.83	8.28	16.05
C	1	7	2.19	5.80	0.00	15.35	0.00	0.00	0.00
	2	24	6.98	7.49	0.00	19.94	0.00	6.39	14.16	0.022
	3	7	0.00	0.00	0.00	0.00	0.00	0.00	0.00

* p-value in the Kruskal–Wallis test.