Leaking battery damage

[mattsoft]

I have an old expansion board for an A1000 that had a battery on it when I found it. I removed the battery, but it had leaked. I cleaned the area with vinegar, then soap and water, and finally isopropyl. But the board still has that green color of battery corrosion. See picture:

https://www.dropbox.com/s/m2tlfunm8xpsbna/IMG_1370.JPG?dl=0

Should I try cleaning this further until that color is totally gone? Will it continue to corrode? The expansion works, so the damage appears to be superficial -- but I'd like to keep it from getting worse if possible. I just don't know if the green color is fluid from the battery or just damage.

Thanks!

 

[Thelemorf]

I would take something, like a small flat screwdriver, and remove the soldermask. Then clean with neutralizing agent of your choice and finally use something like nail polish to stop further corrosion.

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[BLTCON0]

@mattsoft
Looks like it can use some more cleaning, you can do what Thelemorf suggests.
Here's an old experience of mine with a similar situation. Lightly scrubbed with a flathead screwdriver, neutralised with lemon juice and finished with nail polish.
Just be careful with the traces, you don't want any accidentally cut.

 

[mattsoft]

Thanks -- OK, i scraped with a flathead and got most of the bubbly solder mask off. all the bluegreen damage is gone. i then soaked with baking soda paste, then soaked a bit in vinegar (don't know if the leak was acidic or not, so...) then washed it thoroughly with dish soap. it looks MUCH better. drying now then will fire it up tomorrow night to make sure it still works. any recommendations on nail polish color -- i'm partial to glitter myself.

 

[Thelemorf]

Pink!

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[fordav1]

using nail polish on a pcb is one of the most stupid things ever.
scrub the board with a fiberglass pen until it is bright copper then just leave it alone.
It won't get any worse like that. I've repaired literally 1000's of things in the past that had some level of soldermask damage and I just left them as-is without solder mask.
I always laugh when I hear about covering the copper with something. The "something" actually does nothing except make it harder to repair next time.

I attached a couple of pics after and before of classic A3000 battery damage that I repaired.
The fiberglass pen is magic.

 

[jvdbossc]

I use plastik 70, that is still repairable afterwards. But is more cosmetic for me, last step dish washer, then plastik 70. But with such large tracks, probably not worth the effort and the cost, it will probably outlive you as is.