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Capacitors look rotten after reflow

Capacitors look rotten after reflow

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Hi all, what may cause this things in attachments? Did it re... - Feb 10, 2023 by klauss

Those capacitors look totally fluxed. I can't tell if the la... - Feb 10, 2023 by Stephen

It happened just after it came out of the reflow oven. And i... - Feb 10, 2023 by klauss

It looks like metallization was somehow etched out from the ... - Feb 12, 2023 by Deni

it happen on all caps with the same value but only single ty... - Feb 14, 2023 by klauss

You mots likely got bad caps - you should contact supplier/m... - Feb 14, 2023 by Deni

Are you gluing these components by chance? I had an assembl... - Feb 28, 2023 by Joey Bridges

It looks like the plating and metalization were stropped off... - Mar 09, 2023 by Evtimov

klauss

#88941

Capacitors look rotten after reflow | 10 February, 2023

Hi all, what may cause this things in attachments? Did it really rot as i thought? or it is something else.

Attachments:

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Stephen

#88943

Capacitors look rotten after reflow | 10 February, 2023

Those capacitors look totally fluxed. I can't tell if the last photo is showing a concavity or a blob of stuff. I think it is a blob of flux and contaminants. Does it burn off with a soldering iron?

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klauss

#88945

Capacitors look rotten after reflow | 10 February, 2023

It happened just after it came out of the reflow oven. And i guess the thing on the last photo is not blob of staff but the remaining part of termination of the cap. because when i try to iron soldering on it, i just cant. solders not sticking. on it.

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Deni

#88951

Capacitors look rotten after reflow | 12 February, 2023

It looks like metallization was somehow etched out from the capacitors. Does it happen on all capacitors on that PCB or just a single type?

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klauss

#88956

Capacitors look rotten after reflow | 14 February, 2023

it happen on all caps with the same value but only single type.

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Deni

#88959

Capacitors look rotten after reflow | 14 February, 2023

You mots likely got bad caps - you should contact supplier/manufacturer of that caps.

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Joey Bridges

#89006

Capacitors look rotten after reflow | 28 February, 2023

Are you gluing these components by chance? I had an assembly where a glue dot was slightly too big and it pulled to the outside of the components solder joint. This looks eerily similar.

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Evtimov

#89051

Capacitors look rotten after reflow | 9 March, 2023

It looks like the plating and metalization were stropped off the component. I would suggest these are counterfeit parts. Are these Pb free parts and process?

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