Classification as corrosive to metals refers only to chemicals that corrode steel and/or aluminum and does not provide information about the corrosivity potential to other metals. Two types of corrosion phenomena are considered when classifying chemicals as corrosive to metals: – the uniform corrosion attack and the localized corrosion (e.g., pitting corrosion, shallow pit corrosion).
A chemical which is corrosive to metals means a chemical which by chemical action will materially damage, or even destroy, metals.