For example, you should not use a polyethylene bund to store corrosive chemicals.
Are your students sufficiently prepared to handle such corrosive chemicals?
A unit on the safe handling of toxic and/or corrosive chemicals might be a better lesson.
But do not actually use a toxic and/or corrosive chemical.
A cathodic protection system is used to lessen any bad effects from corrosive chemicals in local ground water.
But if you're not working around corrosive chemicals or sharp objects, then go for the cheaper options.
What the explosives themselves didn't destroy in the lab, the corrosive chemical would.
Some corrosive chemicals are valued for various uses, the most common of which is in household cleaning agents.
Instead, less corrosive chemicals like urea are used in the de-icing.
For example, you may not be able to use a polyethylene container to store corrosive chemicals.