The weight loss of an aluminum (Al) alloy corroding in HCI acid was observed to be 0.250 g/cm2 after an 8 h immersion period. Wh
at is the corresponding corrosion current density in mA/em2, assuming that all the corrosion is due to the reaction: Al → Al3+ + 3e
The atomic weight of Al is 26.98 g/mol.