Experimental Study on Seismic Fatigue Capacity of High- and Mild-Strength Structural Steels with and without Corrosion

Table 2

The amount of corrosion for different atmospheric environmental conditions in micrometers based on the ISO 9224 standard [28].

Metal	Corrosivity category	Exposure time years
		1	2	5	10	15	20
Carbon steel	C1	1.3	1.9	3	4.3	5.4	6.2
	C2	25	36	58	83	103	120
	C3	50	72	116	167	206	240
	C4	80	115	186	267	330	383
	C5	200	287	464	667	824	958
	CX	700	1006	1624	2334	2885	3354