Mechanical Degradation of Q345 Weathering Steel and Q345 Carbon Steel under Acid Corrosion

Table 2

Degradation of mechanical indexes of steels.

Steel type	Corrosion time	Average corrosion rate %	Average	Degenerate %	Average	Degenerate %	Average	Degenerate %	Average	Degenerate %
Carbon steel	0	—	469.73	—	598.13	—	218.68	—	36.32	—
	1	0.53	457.28	2.65	594.48	0.61	214.61	1.86	34.28	5.59
	2	0.68	450.38	4.12	586.95	1.87	209.93	4.00	32.11	11.58
	4	1.30	443.66	5.55	582.16	2.67	202.96	7.19	29.86	17.80
	8	1.82	438.45	6.66	578.15	3.34	198.41	9.27	27.85	23.33
	12	2.49	434.03	7.60	572.89	4.22	194.87	10.89	26.38	27.36
	24	3.45	431.07	8.23	568.76	4.91	190.30	12.98	24.76	31.83
	48	4.36	426.94	9.11	562.96	5.88	184.63	15.57	23.07	36.48
	72	4.77	418.20	10.97	556.92	6.89	175.53	19.73	21.16	41.74
Weathering steel	0	—	475.32	—	618.19	—	234.96	—	43.30	—
	1	0.47	468.05	1.53	600.32	2.89	221.85	5.58	40.54	6.38
	2	0.74	463.09	2.57	595.11	3.73	214.17	8.85	37.13	14.25
	4	1.39	456.41	3.98	586.12	5.18	207.70	11.60	34.41	20.54
	8	1.80	450.52	5.22	581.87	5.87	196.85	16.22	31.82	26.52
	12	2.57	446.04	6.16	578.26	6.45	189.68	19.27	28.61	33.92
	24	3.04	439.94	7.44	572.44	7.39	186.70	20.54	25.91	40.17
	48	3.90	433.80	8.74	566.17	8.41	180.73	23.08	23.25	46.31
	72	4.30	427.01	10.16	560.79	9.28	174.86	25.58	20.71	52.17