Lexikon

a corrosive substance is one that will destroy or irreversibly damage another substance with which it comes in contact. The main hazards to people include damage to eyes, skin and tissue under the skin, but inhalation or ingestion of a corrosive substance can damage the respiratory and gastrointestinal tracts. A low concentration of a corrosive substance is usually an irritant. In the Globally Harmonized System (GHS) both rapid corrosion of metals and chemical corrosion of skin qualify for the "corrosive" symbol.
Common corrosive chemicals are classified into:
Acids, bases, dehydrating agents, strong oxidizers, electrophilic halogenes, organic halides and organic acid halides, acid anhydrides, alkylating agents, some organic materials, like phenol.
(Source: Wikipedia)