Once you enter combat, it starts degrading. After it starts, even if you leave combat, it will still degrade.
There is no corrupted dragon 2h sword in Runescape. All corrupt items degrade within 30 minutes of being worn regardless of whether you are in combat or not.
Corrupt dragon armour offers similar stats to Dragon armour, however it degrades. Nothing will happen by simply wearing corrupt armour, however while in combat it will degrade and turn to dust by the end of its use. Otherwise, it is the harmless free-player counterpart of dragon armour.
yes
Corrupt dragon items can only be obtained by buying them or by rare pvp drops.
The Answer Is: You Can't. You can only buy a corrupt dragon dagger or pk in a pvp world for one. There is no way you can corrupt any dragon weapons.
Yes, unless it is corrupt dragon armour
All corrupt weaponry and armour are dropped from players in pvp worlds.
You can't the are like barrows items and rings of dueling. They are like a barrows item because they degrade after use and they are like ring of dueling because once they degrade they crumble to dust, meaning you can't use them anymore. There is absolutely no way to turning a corrupt item back to normal.
Corrupt Dragon items degrade over time. There are no npc's or player related skills to fix them, once they are fully degraded they dissapear.
The most expensive drop you can get on runescape is the corrupt dragon battleaxe at 3.9m
At the current time no, it's highly unlikely that there ever will be.
30 minutes . If you get corrupt dragon by killing players, go to the nearest bank and withdraw some runes and teleport to varrok.