Why data centers can't just pump seawater: corrosion, salt fouling, and biofouling explained
AryHHAry · x · 2026-09-30
Answering why seawater can't be directly used for data center cooling, the author explains that corrosion is only a symptom—the real problem is three things happening at once: chloride attacking metal, salt left behind as water evaporates, and marine organisms fouling heat exchangers.
Evaporative cooling needs clean water turning to vapor; with seawater, the H2O leaves and deposits clog the system. Forced closed-loop circulation is also risky because seawater's high conductivity means even a hairline leak endangers the hardware.
So being near the sea doesn't mean you can pump it directly—you need filtration or dedicated heat exchangers, shifting the burden to power, membranes, and brine disposal. The scarce resource isn't seawater volume, but a salt-tolerant interface that won't damage the chips behind it.
More from Infra
- AAOI burnt capex on US vertical integration, CW laser yield still poor — jwt0625 · 2026-09-30
- PrismQuant: null-space rotations make INT4 near-lossless, only 0.22pp below FP16 on Llama-70B — NanyangTechnologicalUniversity · 2026-09-30
- AI data centers may push IG rates past 10% as compute absorbs global capital — sudoraohacker · 2026-09-30
- ByteDance's HELIX Unifies Sequence Retrieval and Feature Interaction, Deployed in TikTok — _reachsumit · 2026-09-30
- DeepSeek's releases reportedly come surprisingly close to a full Ascend stack for frontier training — teortaxesTex · 2026-09-30
- Strata engine runs Qwen3.8 Flash Next on a 12GB laptop at 51 t/s, 1500 t/s prefill — MLDataScientist · 2026-09-30