Why copper appeared early in powder magazines

How early did sailing warships begin using copper around their powder magazines?

Fairly early in the gunpowder era, because navies quickly needed materials that helped protect powder from both damp and sparks.

Black powder had to remain dry to work reliably, yet its storage also demanded strict spark control. Copper offered useful properties for addressing both hazards around the magazine. Navies therefore adopted it early in the age of gunpowder at sea rather than as a late refinement. Magazine materials were part of combat readiness and ship survival.