edit: Also, you haven't given any kind of reliable source which says that corrosion played a suspected part in this incident.[/QUOTE
I Quote
The problems began Monday when a sludge reservoir burst at a metals plant in Ajka, a town located about 160 kilometres southwest of Budapest. It flowed down roads and through homes, quickly dumping an estimated 1 million cubic metres of toxic waste on Ajka and six other towns in the area.
By Wednesday, the sludge had flowed within 100 kilometres of the Danube -- a 2,850-kilometre-long river that flows through Croatia, Serbia, Romania, Bulgaria, Ukraine and Moldova, as well as into the Black Sea.
It's incredibly corrosive. It's caustic," said Scott Cardiff, international campaign co-ordinator with Earthworks. "These red sludges produced from the alumina refining are very dangerous for humans and for the ecosystems." "We expect contamination through the sediment of the waterways, but also contamination with heavy metals, with lead, possibly cadmium," he told CTV News Channel.
Now AMP I don't know where you're getting your news..but Caustic and corrosive covers my point
What this story is not telling is a gold mine..operating under the radar...and dumping