Ring of resist corrosion
An ring of resist corrosion grants its wearer corrosion resistance, providing a 50% chance of negating each level of the corrosion status effect you would normally receive. It also reduces the amount of acid damage you suffer by 50%, further reducing the odds of any given attack corroding you.
Desirability
When facing acid damage, corrosion resistance is very helpful, reducing your damage intake and preventing corrosion from affecting your accuracy, damage, and AC. Acid damage is a serious threat all throughout the Slime Pits, and can also be an issue when dealing with caustic shrikes, tengu reavers, yellow draconians, liches, and oklob plants.
History
Prior to 0.18, the ring of resist corrosion was an amulet.
Prior to the corrosion overhaul of 0.15, corrosion resistance offered a 90% chance of negating corrosion effects against vulnerable weapons and armour. This stacked with other sources of resistance.