Portuguese to English Other Environment & Ecology Municipal Solid Waste Reg

'Caustificação - Linhas e tanques de armazenamento de lixívia recorrendo a camiões de vácuo em INOX preparados para substâncias ácidas e alcalinas'

These are regulations for cleaning equipment.

I keep finding Caustification and Causticising, but since my spell check doesn't recognise these words, I'm not sure if they're actually right.

Any ideas?

Thanks in advance for your help!