Corrosion Reason Analysis of 13Cr110 Tubing in an Injection and Production Well of the Suqiao Gas Storage Group

Table 8

Composition analysis results of corrosion products at different positions of 259# sample surface.

Number		C	O	Mg	Al	Si	K	S	Ca	Cr	Ti	Fe	Ni	Total
1	Weight%	9.88	34.54				1.08	1.48	1.78	31.70		17.07	2.46	100.00
	Atomic%	20.28	53.21				0.68	1.14	1.09	15.03		7.54	1.03
2	Weight%	7.76	39.15	0.43	0.39			0.41	0.72	5.61	2.75	41.30	1.48	100.00
	Atomic%	15.82	59.89	0.43	0.34			0.31	0.44	2.64	1.40	18.10	0.62
3	Weight%	11.99	52.56	2.60		0.17		0.20	26.82			5.65		100.00
	Atomic%	19.30	63.50	2.07		0.12		0.12	12.93			1.96