Boca chief Juan Carlos Crespi revealed last night a deal with Barca was set to be closed "either today or tomorrow".
Araujo will begin his Spanish Liga career with Barca B and he declared: "I look forward to the negotiations being resolved so I can play at Barca.
"I spoke to (Juan Roman) Riquelme and he's given me some tips."
Araujo will join on a season-long loan with the option for Barca to sign him permanently for €8 million.
Interestingly, Araujo could've been signed by Real Madrid as part of Boca's sale of Fernando Gago, but they allowed the option to lapse.