Talk:Damage 2.0/@comment-5289249-20140212122812/@comment-24245085-20140212144134

There isn't really a damage type that has the ability to ignore any armor. Corrosive seems to ignore a portion of armor when hitting a ferrite armoured enemy, and also deals bonus damage to them. Radiation seems to do the same with alloy armoured targets.

If you want to reduce enemy's armor you got only two options: Corrosive status chance proc, or http://warframe.wikia.com/wiki/Corrosive_Projection