The Physicomechanical Deterioration Characteristics and Mesoscopic Damage Analysis of Sandstone under Acidic Environment

Table 6

Damage variables of the intermediate scanning layer of rock samples at different time intervals in different solutions.

Soaking time	Corrosion time (days)	Damage variables (D)
pH = 1 H2SO4	30	0.1935
	60	0.2825
	90	0.3416
	180	0.5038
pH = 3 H2SO4	30	0.1412
	60	0.2135
	90	0.2614
	180	0.3507
pH = 5 H2SO4	30	0.1308
	60	0.1754
	90	0.2097
	180	0.2813
pH = 1 HCl	30	0.2123
	60	0.3014
	90	0.3602
	180	0.5184
pH = 3 HCl	30	0.1685
	60	0.2310
	90	0.2732
	180	0.3713
pH = 5 HCl	30	0.1385
	60	0.1886
	90	0.2301
	180	0.2988