1. Corrosion prediction Understanding the effect
of the corrosion environment
Aqueous Process Simulations, Inc. AJ Gerbino Pat McKenzie 2015

2. Agenda Introductions Participants OLI and AQSim
Corrosion technology overview
Using the Corrosion Analyzer

3. Introductions Name Title / role in company Background
Special interests?

4. Who is OLI? A Technology Company
Core competencies
Electrolyte thermodynamics
Process simulation
Aqueous corrosion science
Products
Software
Consulting services
Model development
Data development

5. Meet AQSim OLI Sales Partner
MISSION
To help clients understand and solve water chemistry issues
OLI applications consulting
OLI sales
OLI training
Business Development Directors for OLI
USA and Europe offices
Using OLI technology

6. OLI line of products Flowsheet software
OLI Engine in Alliance Partner products
OLI-only thermodynamics
Original ESP (powerful but dated UI)
Flowsheet: ESP (1Q 2016)
OLI Studio software
Stream Analyzer
ScaleChem
Corrosion Analyzer (focus for today)

7. Why Corrosion Analyzer?
Gain insights into
Corrosion mechanisms
Rate-limiting partial processes for your operating conditions
Screen effects
Process and materials changes
Other mitigation measures
Confirm supplier recommendations
Save lab time
Reduce risky plant/field testing
Proactively manage design, operation, and maintenance

8. Why OLI?
Aqueous thermodynamic experts with over 44 years experience with electrolyte behavior
Corrosion scientists who have studied the mechanisms of aqueous corrosion for over 18 year
Process simulation experts who can model physical processes using chemistry and mathematics
Simulation provides a model for “what-if” studies

9. Material courtesy of Dr. Andre Anderko, OLI Systems, Inc.
Prediction basis
Material courtesy of Dr. Andre Anderko, OLI Systems, Inc.

10. OLI’s corrosion prediction basis
Localized corrosion
Special circumstances
of fabricated components
Corrosion vs repassivation potential
Modeling local corrosion
Polarization curves
Modeling general corrosion
Movement through bulk solution
Transport properties
Corrosion Thermodynamics
Pourbaix diagrams
Solution Thermodynamics
OLI’s speciation
Structure of corrosion prediction technology

11. Corrosion prediction: thermodynamics
Solution thermodynamics How ions partition between phases
Corrosion thermodynamics The half reactions of a system that are used to create Pourbaix diagrams

12. Corrosion prediction: transport
Transport properties An OLI-developed framework to calculate diffusivity, conductivity and viscosity at high salinities and conditions

13. Corrosion prediction: kinetics
General corrosion kinetics models to predict
ion diffusion to and from corroding surface
anodic and cathodic surface reactions
flow effects on diffusion layer
Next step: Finish the database
100 chemicals and 20 alloys

14. Corrosion prediction: localized corrosion
Localized corrosion models to predict
Corrosion potential
Passivation potential
Next step: Finish the database
Field trial at DuPont (Johnsonville, TN) complete (2003)

15. Selected validation graphs
Material courtesy of OLI Systems, Inc.

16. Corrosion vs. PCO2 and T
Data from C. de Waard, D.E. Milliams, Corrosion, 1975, 31,

17. Corrosion vs. pH and Flow
A. Dugstad; L. Lunde, Corrosion/94, paper 14

18. Corrosion vs. Flow and T
A. Dugstad; L. Lunde, Corrosion/94, paper 14

19. Corrosion vs. PCO2 and Flow
A. Dugstad; L. Lunde, Corrosion/94, paper 14

20. Corrosion vs. T and brine type
A. Ikeda, M. Ueda, S. Mukai, Advances in CO2 Corrosion, vol. 1 (1984), p
K. Satoh, K. Yamamoto, N. Kagawa, Advances in CO2 Corrosion, vol. 1 (1984), p

21. Corrosion vs. T and O2

22. Corrosion vs. H2S
Sangita and Srinivisan, Prediction and Assesment of Corrosivity of Multiphase CO2/H2S Environments (2000)

23. Corrosion vs. H2S
Sangita and Srinivisan, Prediction and Assesment of Corrosivity of Multiphase CO2/H2S Environments (2000)

24. Corrosion vs. H2S N. Sridhar et al., PRCI report PR-15-9712 (1998)
E.C. Greco, W.B. Wright, Corrosion, 1962, 18, 119t-124t

25. Acetic Acid Corrosion B. Hedges, L. McVeigh, Corrosion/99, paper 21
M.W. Joosten, J. Kolts, J.W. Hembree, M. Achour, Corrosion/2002

26. Acetic Acid Corrosion M.M. Singh, A. Gupta, Corrosion, 56 (2000) 371
D. Abayarathna, A. Naraghi, Corrosion/02, paper 2291

27. Scope: Chemistry
Solution and corrosion thermodynamics (stability diagrams)
The entire scope of OLI chemistry – approx 6,000 species
All contact surfaces and alloys
Corrosion kinetics (rates of corrosion)
Chemistry (development ongoing)
A subset of many common chemistries, including CO2-H2S corrosion

28. Scope: Alloys Alloys Carbon steel Stainless steels
13% Cr (type 410), 304, 316, 254SMO, 2205 duplex
Aluminum
Nickel-base alloys
C-22, C-276, 625, 825, 600, 690 and Ni
Copper-base alloys
Cu, CuNi9010, CuNi7030
Scheduled Alloys (development ongoing)
Super 13Cr, Super 15Cr, 2507 duplex
Alloy 2535, Alloy 28, Alloy 29

29. Corrosion Analyzer orientation

30. Next steps Training Evaluation copies Building turnkey applications
Application building advice
Thanks for your attention!