Automated Conversion of Corrosion Current to Corrosion Rate

Case ID:

This invention is an automated program to be used to convert corrosion data derived from polarization (current vs. voltage) curves to corrosion rates in units of micron per year. The automated analysis calculates corrosion rates in an unambiguous and automatic way. It is less time-consuming and arbitrary than the conventional graphical analysis used currently. The data analysis is used in an automated test station which is currently being developed at the Water Energy Sustainable Technology (WEST) center in Tucson, Arizona. The data is of primary interest for converting electrochemical (I/V) data to corrosion rates (pipe metal loss rates). The crucial aspect of the invention is that it takes raw measured electrochemical current and voltage data and gives a metal loss rate and corrosion potential.



Throughout the world, society is powered by often unseen pipes that transport water and other products through pipes. Because of the importance of such pipes, there is the constant need to ensure they are working properly. This helps to reduce costs and prevent destruction caused from leaks. Leaks themselves can often be caused by corrosion of pipes. This invention helps to address that problem.



  • Water companies, especially in Tucson and the rest of Arizona, where the technology has been tested
  • Companies that sell corrosion prevention products and solutions
  • Companies that treat corrosion in various piping projects
  • Potentially applicable to other projects that use extensive piping (i.e. oil and gas)


  • Is less arbitrary and time consuming than conventional methods
  • Saves the need for an expert to analyze the data
  • Helps save money by accurately predicting pipe replacements before a catastrophe such as a burst pipe

Status: issued U.S. patent #11,977,047

Patent Information:
Contact For More Information:
Tariq Ahmed
Sr Licensing Manager, College of Engineering
The University of Arizona
Lead Inventor(s):
Nicholas McEvoy
Dominic Gervasio