green coating on the ESl63 kopper traces ? what is it

[WrineX]

Hi i again bought a pair of demolished quads. i want to cleant the PCB stator plates from the old glue, maybe remove the nylon when im at it and reglue them. BUT of course the fastest way :0.

So the glue dissolves in acetone both the nylon and the left over glue. but on the newer quads there is a green finish on the copper. anyone knows what this stuff is ? since i tried removing it with acetone on a corner to not **** up my panel before is started cleaning, and nothing happened. But i would like to know what it is so i know it is save to dumb all the pcb's into a bucked with acetone. leave them for an hour then rinse them. and be done with it 🙂

i dont like cleaning 32 panels. i rather let them clean them self.

 

[KatieandDad]

If you have a look at RS Components International and do a search for conformal coating, you will be able to view the COSHH sheets for various products. Although these may not be what has been used in this case it might give you a starting point.

 

[WrineX]

If you have a look at RS Components International and do a search for conformal coating, you will be able to view the COSHH sheets for various products. Although these may not be what has been used in this case it might give you a starting point.

Thx, most of them disolve in acetone. this one i cant at least not with a cotton tip

it almost looks like anodized. although im not sure this is possible on copper? like on aluminum ?

 

[FrankWW]

where were these kept?

i ask because copper, if not protected with some sort of coating, will discolour due to sulphides found in atmosphere


you should ask quad if the copper was coated, etc

 

[WrineX]

well hmm if so then they would have been clear coated but i did not find any of it.

these are esl63's from the 3000 ersial number verry verry early

 

[WrineX]

btw they are a bit discoloured as well but play normal

 

[FrankWW]

btw they are a bit discoloured as well but play normal

here ya go verdigris

https://en.wikipedia.org/wiki/Verdigris

Chemical properties

Copper(II) acetate is soluble in alcohol and water and slightly soluble in ether and glycerol. It melts at 115 °C (239 °F) and decomposes at 240 °C (464 °F). It can be prepared by reacting copper(II) oxide, CuO, or copper(II) carbonate, CuCO3, with acetic acid, CH3COOH.
Verdigris is a variable chemical mixture of compounds, complexes and water. The primary components are copper salts of acetate, carbonate, chloride, formate, hydroxide and sulfate. The secondary components are other metallic salts, acids (organic and mineral), atmospheric gases and water. All the components are in an ever-changing and complex electrochemical reaction equilibrium that is dependent on the ambient environment.
See also

 

[WrineX]

hmm well i dont think its oxide. not sure what it is then. prob a conformer coating , but not affected by acetone.