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

Table 7

Composition analysis results of corrosion products at different positions of 258# sample surface.

Number		C	O	Mg	Al	Si	K	S	Ca	Cr	Mn	Fe	Ni	Cu	Total
1	Weight%	13.48	35.04		0.28	0.51	0.52	0.90	1.35	24.41		20.46	2.35	0.70	100.00
	Atomic%	26.08	50.90		0.24	0.42	0.31	0.66	0.78	10.91		8.51	0.93	0.26
2	Weight%	8.17	37.58		0.40	0.73		0.34	0.72	4.76	0.48	44.92	1.91		100.00
	Atomic%	16.86	58.20		0.36	0.64		0.26	0.45	2.27	0.21	19.93	0.81
3	Weight%	12.39	53.57	2.47	0.32	0.73	0.21		22.90			7.41			100.00
	Atomic%	19.72	64.04	1.94	0.23	0.50	0.10		10.93			2.54