Funny how mistakes can make us grow

[anachronism]

Here's a weird one. I had around 50 ceramic processors that were still in the board in small cut out squares. They've been hanging around for a few years so I thought I's crack on and deal with them.

The thorny issue was how to get them out of the board so I thought I'd put one in HCl to dissolve the solder in the hope that the chip would then come free out of the holes.

Then in typical lab rat style I parked the jar in the corner of the fume cabinet and forgot about of for a few weeks whilst I got on with other things. Roll on to last night and I noticed the liquid had turned a green colour and not just the solder but the pins too. Further to that, the plating had come away from the tungsten heat spreader. I've included a pic below however it looks as though my HCl addition turned itself into a Copper Chloride leach....

Isn't it great when we discover things by accident?

Needless to say the other 50 are now in HCl and being forgotten about as we speak....

 

[Yggdrasil]

Here's a weird one. I had around 50 ceramic processors that were still in the board in small cut out squares. They've been hanging around for a few years so I thought I's crack on and deal with them.

The thorny issue was how to get them out of the board so I thought I'd put one in HCl to dissolve the solder in the hope that the chip would then come free out of the holes.

Then in typical lab rat style I parked the jar in the corner of the fume cabinet and forgot about of for a few weeks whilst I got on with other things. Roll on to last night and I noticed the liquid had turned a green colour and not just the solder but the pins too. Further to that, the plating had come away from the tungsten heat spreader. I've included a pic below however it looks as though my HCl addition turned itself into a Copper Chloride leach....

Isn't it great when we discover things by accident?

Needless to say the other 50 are now in HCl and being forgotten about as we speak....

Hmm, might it be just the Nickel layer that has dissolved?

 

[anachronism]

It may well be Ygg, and the pins all went too

 

[Yggdrasil]

Here's a weird one. I had around 50 ceramic processors that were still in the board in small cut out squares. They've been hanging around for a few years so I thought I's crack on and deal with them.

The thorny issue was how to get them out of the board so I thought I'd put one in HCl to dissolve the solder in the hope that the chip would then come free out of the holes.

Then in typical lab rat style I parked the jar in the corner of the fume cabinet and forgot about of for a few weeks whilst I got on with other things. Roll on to last night and I noticed the liquid had turned a green colour and not just the solder but the pins too. Further to that, the plating had come away from the tungsten heat spreader. I've included a pic below however it looks as though my HCl addition turned itself into a Copper Chloride leach....

Isn't it great when we discover things by accident?

Needless to say the other 50 are now in HCl and being forgotten about as we speak....

I love these set it and forget it processes

 

[Martijn]

I think in time as the HCl dissolves iron parts, it will create ferric chloride. This dissolves copper. When all iron is gone, the copper does not cement out anymore and you have a combination of leeches.
Great find!