A Multi-Metal Corrosion Inhibitor for Potassium Formate Solutions

A multi-metal corrosion inhibitor was tested in potassium formate (HCOOK) solutions. The results showed that the inhibitor could provide full protection on mild steel, aluminum, copper, and brass, and good protection on soft solder. For cast iron, a secondary inhibitor would be needed to provide protection against pitting and crevice corrosion.