Hi
I can, easily measure resistance and loop in district heating pipes. But how do I measure the corrosion?
I've seen some examples using a ZRA (how ever that design would be) and a voltmeter. But all of these schematics have 3 connections one to each electrode and then a plane between the two.
But here we only have a copper wire and the steel pipe, where the copper wire is separated from the steel pipe using a non conductive foam.
So how can I in fact measure the actual corrosion? I've read that the voltage between copper and steel would be around 0.3V, but I guess that depends on the purity of the water?
Also if I try to convert the current using a I/V converter between the two "wires" (steel and copper) I measure something in the order of 2mV but if I measure with a voltmeter I measure something like 200mV
On another set I measure i.e. 0mV using the ZRA but 400mV with the voltmeter.. What gives?
Thanks in advance
I can, easily measure resistance and loop in district heating pipes. But how do I measure the corrosion?
I've seen some examples using a ZRA (how ever that design would be) and a voltmeter. But all of these schematics have 3 connections one to each electrode and then a plane between the two.
But here we only have a copper wire and the steel pipe, where the copper wire is separated from the steel pipe using a non conductive foam.
So how can I in fact measure the actual corrosion? I've read that the voltage between copper and steel would be around 0.3V, but I guess that depends on the purity of the water?
Also if I try to convert the current using a I/V converter between the two "wires" (steel and copper) I measure something in the order of 2mV but if I measure with a voltmeter I measure something like 200mV
On another set I measure i.e. 0mV using the ZRA but 400mV with the voltmeter.. What gives?
Thanks in advance