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I just did this to my MacBook not because of the sharp edge but because the pitting turns a sharp edge into a sawblade. Something about the grounding on on the
by 420official 5mo ago
I just did this to my MacBook not because of the sharp edge but because the pitting turns a sharp edge into a sawblade. Something about the grounding on on the frame when plugged in mixed with my sweaty hands leads to damage along this sharp edge on every MacBook I've ever owned.
See https://www.reddit.com/r/macbook/s/hbyVh5SJhw https://www.reddit.com/r/macbook/s/hbyVh5SJhw for another poor soul with the same caustic skin
- al_borland 5mo agoThis comment is concerning. > acidic sweat. once you got through the anodization the raw aluminum wears faster.... If one files off the sharp edges, won’t the sweat eat through everything faster, as that protective layer was filed off.
- compass_copium 5mo agoAluminum should oxidize essentially instantly.
- lukevp 5mo agoAnodizing and oxidation are 2 totally different things.
- Brian_K_White 5mo agoanodizing is literally oxidizing
- nikisweeting 5mo agoYes but anodization implies thickness around ~5–25 micrometers (µm) for aluminum. The natural oxide coating is ~2-5 nanometers (1,000–5,000× less thick).
- themafia 5mo agoTrue; however, this is an aluminium alloy. These typically have lower corrosion resistance and are most commonly anodized because of it. The applied layer is typically 3 to 5x thicker than that formed by pure aluminium oxidization.
- nikisweeting 5mo agoYou're off by at least 3 orders of magnitude, anodization is like 1,000x~5,000x thicker (5~25µm) than the natural oxide coating (~5nm).
- crdrost 5mo agoProbably. But, the time when the laptop is taped off would be uniquely a good time to hit it with some polyurethane or something clear to protect it from that sort of damage? Just make sure you hit it with compressed air first so you aren't gluing the aluminum dust to the chassis?
- greazy 5mo agoOh wow I think I have a mild version of this. Can it cause the plastic on the mouse to break down?
- bluGill 5mo agoYes, it is fairly common with some plastics. better plastics won't but there are a lot of different plastics with differt formulas (and many can be mixed)
- BoredPositron 5mo agoYou need to moisturize more.
- greazy 5mo agoIm an anxious person. I sweat from my hands due to anxiety and not dry hands.
- CGamesPlay 5mo agoOh is that why it happens? Was wondering why the spot directly under my wrist was pitted into a sawblade. I also filed it, though just enough to remove the pitting, nothing like the OP did. It's easy for me to feel the mains frequency while gently rubbing the top surface of the MacBook while it's plugged in. Really feels unsafe, but neither me nor the computer have suffered any serious injuries yet.
- ajam1507 5mo agoUsing a 3 prong extension cable on the charger will prevent this.
- imglorp 5mo agoHow? The (US) charger's only got 2 pins so ground stays unconnected.
- Tsiklon 5mo agoThe extension cable they used to include in box with the computers, it has the third pin for the charger brick connector which is wired to ground
- 15155 5mo agoThere's zero chance that the DC ground in the laptop is tied to earth ground in the charger: they use LLC resonant converters and flyback converters (depending on vintage) - an earth ground tie would defeat the purpose of these isolated topologies.
- dataviz1000 5mo agoI’ve been traveling around the world. It is 50 / 50 of the socket is properly grounded —-anywhere in the world. I get a tingling zap on the wrist when not properly grounded. The charger also gets hot and sparks.
- ddlsmurf 5mo agobut it's never going to be grounded, there isn't even a ground pin on the charger
- russelg 5mo agoIf you swap in the extension cable head, that does indeed have a ground pin, at least in Australia anyway. The grounding comes from that metal ring that the connector uses as a guide. https://www.apple.com/au/shop/product/mw2n3x/a/power-adapter-extension-cable https://www.apple.com/au/shop/product/mw2n3x/a/power-adapter...
- ddlsmurf 5mo agoonly two prongs of which make it through. Usually the regulation as I understand is that it's fine if you can prove the case can never get in contact with anything electric, for most laptops that's just being made of plastic.
- bragr 5mo agoAs has been established in other threads here, the metal button thing the prongs slide onto is an earth connection.
- ddlsmurf 5mo agoJust take an apple charger and a multimeter, try to find a path to ground from the computer side, I'll wait. Plugs have regulations on how they can be built which are different from how they must be connected.
- 5mo ago
- Esophagus4 5mo agoSo glad to know it wasn’t just me with sweaty hands and pitted aluminum that is razor sharp!
- esskay 5mo agoHuh, I've had that pitting with every magic mouse I've owned, the sides of it end up looking like a cheese grater...apparently my fingers are acidic!
- roysting 5mo agoHave you ever had that looked into it maybe just ask AI? That does not seem healthy.
- Jolter 5mo agoIt’s extremely common and nothing to worry about. As a brass instrument player, I sometimes come across someone whose instruments always deteriorate at 300% of the rate of others. Laquer peels, silver plating blackens, etc.
- roysting 5mo agoThanks. That’s astonishing to me. As far s as I know I’ve never come in contact with people with acidic skin/excretions like that.
- chubs 5mo agoHoly moly, that guy in the reddit post needs to see a dermatologist asap and figure out why their skin is emitting acid.
- sanj 5mo agoI’ve noticed that this only occurs when I use a two-prong adapter for the power brick. If I use the 3-prong, which is usually tied to a long cable, I don’t feel the buzz. I assumed that the additional grounding helped.