Is spraying conformal coating a good idea for a MacBook logic board?

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Dawson Hessler @dawsonhessler

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投稿日: 2018年11月1日

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Is spraying conformal coating a good idea for a MacBook logic board?

A common cause for Macbooks to die is corrosion on the motherboard in certain areas. It is incredibly easy for MacBook logic boards to get corroded by just humidity in a room. So I had an idea that maybe I could spray my entire MacBook Pro 2015 (top tier model) logic board with conformal coating.

If I was to spray the board on my $3000 laptop, does anyone have any tips as to what I should watch out for? Is this not a good idea? This is a first for me. I want to make sure I don’t have to learn the hard way what not to do.

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For future world my answer. Apologies to necro an old question.

Even basic house dust drawn into a computer can cause issues with corrosion, the build up is likely to adsorb moisture from air also drawn into the computer from the cooling system.

Even 'dry' rooms are not actually dry, and humans exhale moisture laden air onto and around their devices constantly.

Instead of completely covering the circuit board/s of a computer with an industrial conformal coat, it would be best, imo to ascertain the components or area of the logic board in question that is most likely though experience or asking on repair media channels to become damaged through corrosion, then carefully sealing those areas leaving the 'less at risk' parts uncovered.

Watching mac repair video channels you will see that corrosion is often present on logic board component's solder joints, even if there is no actual liquid damage, all from dust and normal humidity.

Martin Rabson さんによる2023年3月7日

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arbaman @arbaman

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I'd dispute all the way the statement that Macbooks would suffer of corrosion because of normal humidity conditions and need any prevention treatment for long lasting.

It might be true under very extreme and severe conditions, i.e. normally used on a boat sailing on the ocean in tropical waters for years and years but otherwise, unless temperature excursions are very high and may cause inner condensation, experience proved so far that logic boards may well last decades unharmed.

I live a few hundreds meters from the sea side on a very windy island, typical mediterranean climate, and I got around all sorts of Macs manufactured in the last 20 years.

Well, I can tell for sure that not a single board shows signs of corrosion, ancient iMacs and iBooks included. I can also confirm that one week of humid southern winds in autumn is sufficient to trigger Apple's liquid sensors on iPhone's boards that have never experienced any liquid contact.

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For future world my answer. Apologies to necro an old question.

Even basic house dust drawn into a computer can cause issues with corrosion, the build up is likely to adsorb moisture from air also drawn into the computer from the cooling system.

Even 'dry' rooms are not actually dry, and humans exhale moisture laden air onto and around their devices constantly.

Instead of completely covering the circuit board/s of a computer with an industrial conformal coat, it would be best, imo to ascertain the components or area of the logic board in question that is most likely though experience or asking on repair media channels to become damaged through corrosion, then carefully sealing those areas leaving the 'less at risk' parts uncovered.

Watching mac repair video channels you will see that corrosion is often present on logic board component's solder joints, even if there is no actual liquid damage, all from dust and normal humidity. — Martin Rabson

Dan @danj 評価: 479.6千 Self employed contract worker 35 329 971 · Answer 1 · 2018-11-01T10:53:28-07:00

Don’t do it!!

There are many different conformal coating materials.

First any coating will interfere with the components cooling. Think it like a winter jacket on a 90 degree day not good! So you want to make sure what ever you use does not cause things to overheat.

Acrylic or Polyurethane or Epoxy conformal coatings are by far are the most insulative material. Silicon would be the better choice but it still has its issues! Once you apply it to your logic board you won’t be able to service your system as the silicon will interfere with soldering.

Acrylic should only be used if you where using liquid metal TIM and only on the CPU base nowhere else.

So you win and you loose!

Best not to do it at all, and focus on managing the dampness! You need to use a good desiccant in your computer bag Silica Gel in a nylon hose bag.

Use a plastic bag and suck out the air before you leave an air conditioned office so the condensation of the outdoor air does not get to your cold computer. Let the system warm up to the ambient temp of your home before taking it out of the bag. Use a dehumidifier where you use your laptop!

MacBook Pro 15インチ Retina Display Mid 2015

Is spraying conformal coating a good idea for a MacBook logic board?

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