Coolant Leak

Full disclosure - I actually have a 2012 Chevy Orlando 1.8, but I believe it's the same 1.8 Ecotec engine as in Zafiras. So I'm hoping somebody here can help.

It looks to me like coolant is leaking from the pipe shown in the photos attached below (it was a lot wetter, but most of the liquid has evaporated).


What is that pipe/part called? (And what does it do?)
Is it relatively easy to get a replacement part? Is it relatively easy to fit?

(Is there any kind of temp fix I can do, until it's replaced?)

Thanks for any info you can give.