The recent failure (July 26, 2017) of the amusement park ride (the Fireball, manufactured by KMG) was a result of excessive (and apparently undetected) corrosion.

For more information, including some photos of the failed joint and soem interesting comments from workers, see this post.

Corrosion in all its forms is behind many failures, and is especially dangerous where inspection is difficult (for example, between assembled parts or hidden behind cover plates, as in the case of the I-95 Mianus River bridge collapse in Connecticut in 1983. Stress corrosion cracking and fatigue failure in which corrosion can play a role have been responsible for many material failures.