corosion in amine plant

[Sina]

Hello to all,
In our gas plant, we treat gas with amine solution (DEA). The body of absorption tower is carbon steel and trays are stainless steel. we had a major corrosion in the connection of tray to body of tower.
what kind of corrosion we had face?
what should we do to repel the corrosion?
Do you experience that kind of corosion in your gas plant?

Thank you for your time


Best regards.