Potential-pH (Pourbaix) diagrams are used as road maps for aiding in predicting the most stable
states of a metal, its corrosion products, and its associated ions in an aqueous solution. It is presented
on plot of equilibrium potential vs. hydrogen ion activity. Organic ions including those of biological
importance such as amino acids can affect the most thermodynamically stable states associated with the
metal. This paper explores how potential-pH diagrams might be used as aids for screening such organic
corrosion inhibitors and sequestering agents. The diagrams were generated using a newly developed
internet accessible web based application. The web application and its advantages over comparable
single user personal computer platform-based applications are also summarized.