China completes record 537-day deep-sea materials experiment under extreme pressure

China completed a record 537-day in-situ deep-sea test at 11,000 meters, exposing multiple materials to extreme pressure and salinity.

The experiment examined corrosion, coating failure, sacrificial anodes, and long-term performance of deep-sea materials.

Recovered samples will provide rare real-world data to improve durability design and lifetime prediction for subsea equipment.

The findings could help make oil, gas, mining, and other deep-sea systems more reliable.