Replies to this message

: Looking for a way to Induce a -ve charge in a liquid
: Looking for a way to Induce a -ve charge in a liquid -- eg88	Post Reply	Top of thread	Forum

Posted by: Bruised ® 03/26/2008, 07:36:26 Author Profile eMail author Edit

It really depends on i) what for? and ii) relative to what? Also, not sure whether you're trying to create a current or a voltage? Assuming you want to induce a voltage relative to, say, its container, a battery connected +ve to container and -ve to liquid (via electrode) will set the liquid at a -ve potential. (This is also known as cathodic protection if the liquid is water and the container is a boat or jetty...). If you'd prefer to send a charge through the liquid (you did say electrolyte) then put in two electodes and a current will flow through it from +ve (Anode) to -ve (Cathode). You'll get a metal forming on the cathode, depending on your electrolyte. Electrodes can just be wires if you're doing a small thing, or use plates for anything big, especially for the second scenario. (This is also seen in batteries during charging, and is the basic process of 'electrowinning' in metal refining).

Post Reply Tell a Friend (must be logged in) Alert Admin About Post

Where am I? Original Top of thread

| |

: : Looking for a way to Induce a -ve charge in a liquid
: : Looking for a way to Induce a -ve charge in a liquid -- Bruised	Post Reply	Top of thread	Forum

Posted by: Bruised ® 03/26/2008, 07:41:33 Author Profile eMail author Edit

Woops, you also can use a 'sacrificial anode' in the case of a vessel, in theory a battery would work, but I've never heard of it - definitely common on structures.

Post Reply Tell a Friend (must be logged in) Alert Admin About Post

Where am I? Original Top of thread

| |

: : : Looking for a way to Induce a -ve charge in a liquid
: : : Looking for a way to Induce a -ve charge in a liquid -- Bruised	Post Reply	Top of thread	Forum

Posted by: eg88 ® 03/27/2008, 17:52:05 Author Profile eMail author Edit

Thanks for response Bruised. (I hope the soreness fades soon) I think I need to create a voltage across the liquid rather than a current. Have you heard of Kelvins Thunderstorm? Well I'm trying to recreate one of the water droppers from that, but on a larger scale. Today I was looking at electrostatic spraying (painting, crops etc)for inspiration, and that's the kind of thing I need to re-create. Is it enough just to rely on a high voltage around a container, to induce a charge and then let the "electrolyte" (if that's the right term) spray out under gravity. I think I'm missing something here, but I'm not sure what. Thanks again for any response.

Post Reply Tell a Friend (must be logged in) Alert Admin About Post

Where am I? Original Top of thread