Two more attempts at plating with Acid.
These attempts used higher voltage than previous attempts and weaker acid solutions. Power supply was set to maintain a fixed voltage rather than current.
- Set volts to ~ 1.84 Volts and added acid to bring current to 2 Amps
- Current dropped to .92 Amps in 5 hours. Gray coating just starting to form
- dried with paper towel and it read 10-20 mV but dropped to 000.0mV when dried with a 60 watt lamp for ~ one minute
- back in tank, moved anode closer to maintain 2 Amps
- after 7 hours total time, very shiny but coarse, dried and LEC read 000.0 mV
- fresh solution ~ 80mL acid in 1.5 L water
- brass plate ~ 2 inched from heavy iron plate Anode
- 1.37 Volts @ 2 Amps
- no coating after 1.5 hours increased volts to 1.5
- no coating after 6 hours so upped Voltage to 1.64
- no coating after 12 hours so upped voltage to 1.84V
- left over night, very heavy coating with coarse particles ~ .5mm in size(colour very shiny, chrome like) some clumps could be rubbed off with fingers.
- dried with towel and lamp and LEC read 000.0 mV
- All trials so far will read some low voltage 2-20 mV or so if the WE is damp. Condensation can often be seen on the CE plate when this occurs.
- When dry no attempt so far has read any voltage at all.
- lower currents and voltage ~ .2 Amps, 400-600 mV yield smoother gray to dark gray plating with magnatite
- higher current and voltage over >1.84 Volts plate very fast with a coarse bright shiny coat, no obvious sign of magnetite
Left: ~ 500 mV 200 mA Right: 1.84 Volts 2 Amps