Comparison of Corrosion Resistance to Ant's Nest Corrosion Characteristics of Phosphorus Deoxidized Copper Tube and Oxygen Free Copper Tube

Abstract

There is oxygen free copper （hereinafter called OFC） as a corrosion resistant material to ant's nest corrosion. We exposed OFC to various corrosion conditions, compared corrosion resistance of phosphorus deoxidized copper （hereinafter called PDC） and OFC, and then presumed the real environment in which ant's nest corrosion occurs.

Corrosion in the depth direction was confirmed as same as PDC by exposing OFC to a high concentration formic acid aqueous solution.

We confirmed that ant's nest corrosion occurs even in OFC under a high concentration of corrosive medium. That's why, we presumed that the condensed water in the actual environment has dilute concentration organic acid.