Atmospheric Corrosion Analysis and Rust Evolution Research of Q235 Carbon Steel at Different Exposure Stages in Chengdu Atmospheric Environment of China

Table 3

EDS component analysis of the element weight percentage (wt%) with different exposure time.

Element (wt%)	15 days	30 days	90 days	180 days	365 days
C	10.01	12.08	10.59	6.43	11.67
N	5.16	5.44	5.57	4.66	5.06
O	37.37	35.1	35	34.96	36.2
S	0.23	0.05	0.12	0.07	0.15
Cl	0.07	0	0.1	0.07	0.1
Fe	47.16	47.33	48.62	53.8	46.83