Coridas' Wallabies end fifth
Australia led 30-0 at the break and survived a second-half fightback from France to finish a credible fifth place in the inaugural IRB Junior World Championship at Cardiff Arms Park in Wales.
The win secured the 105kg flanker and his Australian Under-20s team-mates a reputation as one of the better teams of the competition.
After sitting out Australia's opening 81-12 demolition of Canada, Coridas, 20, made his debut in their second-round 53-17 win over Fiji.
Despite playing just three matches with Sydney club Eastwood since returning from a knee reconstruction, Coridas formed a new-look backrow with Western Force flanker David Pocock and Seilala Lam.
Coridas played in four of Australia's five matches in the tournament including their 32-0 win over Samoa.
Pre-tournament favourites the Baby Blacks, New Zealand's junior team, went on to win the tournament with a comfortable 38-3 win over England in the final.
In the third-place play-off match, South Africa beat Wales 43-18.