BL3 - Interaction between Ember's Blaze, Green Monster and Lucky 7

So, i noticed while leveling moze that the corrosive damage was being transferred to the shield's constant damage effect which was useful against the scraptraps at least. While in skywell i noticed the Lucky 7's shock effect (The middle one on the slot like modifiers) also completely converted the shield to shock as well making it do shock and corrosive when the two effects were stacked. What was also interesting was how the corrosive damage continued to stack like the video put out about the splash damage by @moxsy on youtube and wasnt converted by the Lucky 7 into shock. BORDERLANDS 3 https://store.playstation.com/#!/en-gb/tid=CUSA08025_00