Table 2.

Elemental composition of the corrosion products.

Spot number	Mass fraction of an element, %
	Fe	O	C	Cr	Ni	Ti	Si	Al	Mn	Cl	Cu	Others
Spot 1	45.56	19.77	15.94	12.03	3.56	0.87	0.7	0.63	0.58	0.36	0	0
Spot 2	43.21	45.04	7.28	0.37	0	0	0.4	0.21	0	3.3	0	0.18
Spot 3	89.47	3.68	1.78	0.35	0	0	0	0	0.53	0.2	3.98	0.01
Spot 4	64.01	26.13	7.38	0.21	0	0	0	0	0.39	0.26	0	1.63