Galvanic corrosion is a well-known phenomenon, which occurs when two different metals exposed to the same conditions exhibit differential corrosion rates. The corrosion process is accelerated by the exchange electrons between the metals. In this study, we created a novel layered structure of Cu and Al for efficient electron extraction through charge transfer. Using this Cu/Al laminated structure configuration and galvanic corrosion effect, an open-circuit voltage of approximately −160 mV was generated by measuring the difference in potential between the metal and a useful indicator of the electrochemical dynamics of the system. Furthermore, we effectively transmitted electrons between the metal in the layered structure, as demonstrated by the extraction of a charge of approximately 10−5 C. These results show the potential of using a laminated structure to take advantage of galvanic corrosion as energy generation and electrochemical sensing.
- HP Hack, “Galvanic Corrosion”, Reference Module in Materials Science and Materials Engineering doi:10.1016/B978-0-12-803581-8.01594-0.
- Standard NACE/ASTM G193, Standard Terminology and Acronyms Relating to Corrosion, ASTM International, West Conshohocken, PA.
- Standard ISO 8044, Corrosion of Metals and Alloys−Vocabulary, The International Organization for Standardization, Geneva.
- HP Hack, 1993. Corrosion Testing Made Easy, vol. 2. Houston, TX: NACE International.
- Standard G82, Guide for Development and Use of a Galvanic Series for Predicting Galvanic Corrosion Performance, ASTM International, West Conshohocken, PA.