Study of Electric Field Impact on Crystallization in Tunnel Drainage Pipes in Hard Water Area

Table 3

Test parameters indicating electric field impact on scale inhibition effect of the full-flow pipe.

Test control item	Control parameters
Lab temperature	25°C
Single pipe length	120 cm
Flow speed in the pipe	0.68 m/s
Output voltage	5 V/12 V/24 V
Electric field direction	Radial to circle center (circumferential field)
	Bottom-to-top parallel type (parallel plate electric field)
Flow status in pipe (CO2touch areas)	Full-flow state (ideal touch area of 0)