Sounds like any aluminum tank might be susceptible to the same problem? How exactly did you apply these AL strapping?
Possibly, but I'm thinking one made with either thicker AL, or internal baffles (acting also as bracing) would be OK.
For my reinforcement, picture aluminum angle iron stuck right over the corner of a box. Now weld that on. It wasn't quite that simple since it's not straight pieces, but that gives you the idea.