| General > General Technical Chat |
| Is there a way to remove corrosion off electronic components? |
| (1/5) > >> |
| Refrigerator:
I scored a 3000 piece roll of optocouplers at the flea market, problem is they've been stored in a very damp environment and have corrosion on their legs, which makes it impossible to solder them. They only cost me 1€, which is not a huge loss, but i mean do i really have to throw them all out? :-// So far i've tried vinegar, battery acid, concentrated muriatic acid and caustic oven cleaner and none seem to help, any suggestions? |O I have some copper chloride etching solution so i might give that a try. |
| Refrigerator:
As luck would have it, copper chloride etching solution is perfect at removing the corrosion. After just a few minutes the optocouplers become perfectly solderable :-+ Case closed 8) But just in case post what you know about removing corrosion off components ;D PS: in the picture you can just about see a dark cloud around the optocouplers as they soak in the etchant, which is material being removed. So my etchant is not just self-plating copper as it tends to do on stainless steel tweezers, for example. |
| Faranight:
What concentration of CuCl2 did you use for etching? EDIT: Also, you may want to re-tin those pads after etching them because exposed copper (assuming the pads are copper) may oxidize over time when exposed to air. I hear there are some tinning solutions available that may do the job. |
| DavidAlfa:
Did copper chloride fully clean the black tin oxide or was it just "good enough"? About 2 months ago I had to refurb a Tek TG501, everything was badly oxidized, see attached pictures. Not wanting to take unnecesary risks as lots of parts were unobtanium, I replaced every socket and brushed all the ics by hand. |
| strawberry:
like this? desolder all components. scrape off rust layer and dip in acid. some transistors pins corroded off down under glass VEF elektroakustiskais agregāts https://boot.ritakafija.lv/forums/index.php?/topic/180444-restauracija-radiotehnika-7111-101-odisej-002-001-sakta/ |
| Navigation |
| Message Index |
| Next page |