OLI Studio

Corrosion Analyzer

OLI Corrosion Logo RGB.jpg

Simple and clear access to OLI's electrolyte chemistry expertise

   OLI Studio contains:

  • OLI Studio: Stream Analyzer

  • OLI Studio: ScaleChem

  • OLI Studio: Corrosion Analyzer (with EVS)


The OLI Studio was formerly known as Analyzer Studio.

Now shipping V10

OLI Studio: Corrosion Analyzer

Understanding the chemistry of the corrosion Analyzer

OLI Studio: Corrosion Analyzer offers several unique features which comprise OLI aqueous corrosion simulation technology.

Polarization curves 

Polarization curves generated by the OLI Studio: Corrosion Analyzer show partial anodic and cathodic processes, the mixed potential, the corrosion potential, and the net current density. On the right s a curve showing the chemistry of water and carbon dioxide in contact with carbon steel.

This technology is based on OLI's electrolyte thermodynamic model in combination with a kinetic model for generalized corrosion.

Real solution Pourbaix diagrams, stability diagrams

Pourbaix diagrams are graphical depiction of EH vs. pH for any mixture of chemicals in water. They are used to evaluate stable and meta-stable corrosion and redox products. This allows assessment of the effect of passivating species in real solutions without any simplifying assumptions


Pourbaix's diagrams were created using ideal-solution theory; that is, Pourbaix assumed a water activity of 1. With OLI corrosion's technology, clients can create "real-solution" Stability Diagrams, taking the water activity and the ion-ion interactions into account. The result is the ability to define conditions for metal dissolution, passive films and surface deposits. This in turn can determine optimum pH, concentrations, and EH to minimize corrosion tendencies.

Stability diagrams permit flexible selection of independent variables and graphical depiction of local and global equilibria in various projection. Depictions include EH vs. composition and composition vs. pH for any chemical mixture, including trace components, to assess stable and metastable species in real solutions.


Yield diagrams are a graphical tool ito design the synthesis of compounds (e.g., ceramics) with desired yield for virtually any chemical mixture, including trace components

Rates of chemical corrosion

General corrosion rates and corrosion potential can be mechanistically predicted for a large selection of alloys, including carbon steel, stainless steels, Ni-based alloys, Cu, Cu-Ni alloys, and aluminum.

Local corrosion tendency 

The corrosion and repassivation potentials are calculated for the investigated alloy. In regions where the corrosion potential is larger than the repassivation potential, localized corrosion (pitting or crevice corrosion) can be expected. The maximum propagation rate of individual pits is also estimated.

Extreme value statistics (EVS)

Extreme Value Statistics predicts long-term propagation of localized corrosion on the basis of short-term or medium-term data. In particular, given samples of pit depth, EVS Analyzer calculates remaining asset life using a statistical model