[Retracted] Influence of Sulfur and Additives on Wear of Exhaust Valve Seat of Cylinder Head

Table 7

Contact surface element analysis.

0#			Element	Atomic ratio
			C	87.81
			O	11.85
			S	0.08
			Ca	0.08
			Fe	0.17
			Summation	100.00
0#+			Element	Atomic ratio
			C	46.95
			O	31.44
			S	7.26
			K	14.21
			Ba	0.14
			Summation	100.00
−10#			Element	Atomic ratio
			C	83.19
			O	16.72
			Si	0.03
			S	0.05
			Ca	0.02
			Summation	100.00
−10#+			Element	Atomic ratio
			C	78.48
			O	13.76
			S	2.47
			K	4.36
			Ca	0.19
			Ni	0.67
			Ba	0.07
			Summation	100.00