Exploration of New Electroacupuncture Needle Material

Table 4

Corrosion assessment of wire material in Hank’s solution (x: corrosion was not observed. o: corrosion was observed).

Diameter (mm)	Ti-6Al-4V	Phosphor bronze	SS 304 Ni	SS 316
0.2	x	—	o	x
0.25	—	o	o	x
0.3	—	—	o	x