Galvanic Interaction between Chalcopyrite and Pyrite with Low Alloy and High Carbon Chromium Steel Ball

Table 4

Rest potential of sulphide minerals and steel media at near neutral pH [7, 32].

Mineral	Solution	Rest potential versus SHE/mV
		N2	Air	O2
Galena	Distilled water	142	172	218
	0.5 mol/L NaCl (pH = 10.5)	45		95
Pyrite	Distilled water	405	445	485
	0.001 mol/L Na2SO4	45		95
Pyrrhotite	Distilled water	125	262	295
Arsenopyrite	Distilled water	277	303	323
Chalcopyrite	Distilled water	190	355	371
	0.05 mol/L Na2SO4	115		265
	0. 5 mol/L NaCl (pH = 10.5)	65		115
Sphalerite	0. 5 mol/L NaCl (pH = 10.5)	30		60
Mild steel	Distilled water	−515	−335	−175
	0.5 mol/L NaCl	−395
Ferronickel steel	0.5 mol/L NaCl pH = 10.5	−255		−205