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The March 2015 update of Apple's 13" MacBook Air features fifth generation Intel Core i5 and i7 processors, resulting in slightly increased performance and battery life.

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What are the chances of corrosion on logic board

I dropped some green tea on my table and it went inside the laptop via the memory card and usb chord slot.

I had a keyboard cover on so that was saved. I instantly switched it off, wiped the external water and tried to get all the water out. I then took it to the apple service center and they removed the back cover to find some other places with a few drops of water. We cleaned that with cotton and he then switched it on to check if it was working. It was.

I kept it off for the entire day and checked the back panel again, as guided by the genius, switched it on to do the hardware test. It worked fine even the charger was working. Since then, I have kept it to dry for a 36 more hours.

The service center was not accepting it for a diagnosis to clean it internally too. (Don't know why).

Since it was working they said get it back in 3-4 days for a check.

My only question is what are the chances of corrosion. The second time I opened the back cover, there was no sign of remaining liquid or corrosion (8 hours later may be).

What are the chances of corrosion? If there is any, can cleaning it up with alcohol also prevent the corrosion from coming back in th future.

Update 1

I went to the AAPS, and they opened the laptop. There were no visible signs of corrosion. They said everything looks good and I should try using the laptop after 72 hours of the spillage. Also image attached of the logic board.

I have no skills in cleaning the board and AAPS refused to do it. Image below.

Block Image

Should I take it to a non-authorized centre?

No signs of corrosion on the ports where the water seeped in from too.

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At this point I think you'll just need to inspect the logic board once and awhile to be sure. I don't see any staining so there is no single spot to touchup. Don't forget there is the other side of the logic board too. But as you stated you had a keyboard cover I would say the risk of something getting inside from the top is not likely.

Take is as a good sign! Just be careful in the future.

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Lets look at this from a chemistry perspective:

Pure water does not corrode things its whats in the water that causes corrosion - The free ions. Water does cause rusting of Iron & Steel by the dissolved Oxygen in the water.

So whats in the water is what we need to worry about here! Salts, Sugars & Acids being the big ones. Your Green Tea likely has all three.

Lets take a sauce pan with brewed tea and slowly evaporated the water out what would be left would be the solids from your brewed tea this is what we need to worry about this junk is corrosive. It can be removed by simply cleaning it off with distilled water and isopropyl alcohol (85%).

So if you remember what was wet I would clean the areas again (after disconnecting the battery).

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Thanks Dan. Will try it but it was a really tea bag green tea. So hopefully it doesn't stick out. Will clean the parts again. (Probably at the apple service centre itself)

How long till I can see corrosion if any? And how does it look? I've read it is blue/greenish. I am quite a noob in this

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Corrosion is a tricky thing,

You may see it in an hour or weeks later it all depends on how moist the area the spill was, as well as the moisture in the air. If the area is dry then the of moisture in the air will drive it, reactivating it.

Greenish blue is the copper, the white flakes and dust is the tin in the solder.

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