Similar to the Galaxy Z Flip, the Z Fold 2 has a brush system inside the hinge to help keep out as much filth as possible. Nelson also found the hinge was able to withstand his bend test. Attempting to bend the Z Fold 2s hinge in the wrong instructions didnt damage the primary screen.
Right after customers got their hands on the initial Galaxy Fold, major issues emerged, especially with the screen and hinge. Samsung delayed the rollout of the phone so it could make enhancements, including sealing completions of the hinge to avoid dust from getting within. Things certainly appear to be better from the dive this time around.
Still, it may not be a bad idea to leave your $2,000 Galaxy Z Fold 2 in the cars and truck or in the house when you go to the beach. Just in case.
Samsung Galaxy Z Fold 2s hinge survived a dust bath in a durability test – Engadget
