multi-metal corrosion inhibitor was tested in potassium formate solutions by electrochemical and
immersion testing methods. 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 of pitting and crevice corrosion.
Keywords: corrosion, corrosion inhibitor, potassium formate, heat transfer fluid