At the National Corrosion and Materials Reliability Center (NCMRC), research is conducted by our full-time/part-time researchers and graduate students on various topics related to corrosion science and engineering:
- Comprehensive multiscale-multilayer-multifunctional coating/substrate performance/reliability model based on computational modeling and dynamic electrochemical experimental
- Develop a conceptual framework for a non-intrusive, robust and reliable monitoring system based on current experimental work.
- Design, fabricate, test and verify the new monitoring system at a laboratory scale.
- Conduct designed experiments and collect data for verification of the monitoring system at a laboratory scale.
- Identify parameters that follow the state of the concrete or/and interface concrete/rebar2.
- Integration of theoretical and experimental corrosion assessment tools to monitor and manage coating/substrate integrity
- Internal corrosion is observed due to chemical attack on the interior of the pipeline from aggressive species such as water, sodium chloride and CO2.
- Hydrodynamics conditions inside the pipeline can accelerate considerably the corrosion attack due to higher diffusion of aggressive species and presence of erosion corrosion.
- Corrosion inhibitors with different chemical structures are used for preventing internal corrosion.
- Damage evolution of Non chrome-hexavalent coating/7075 T6 alloy substrate-system under stress conditions based on advanced electrochemical techniques and reliability analysis
- To develop a defined non-hexavalent-chromium/layer(s) physical prototype that enables the characterization of the parameters that deteriorate the integrity and performance of the coating/substrate systems.
Areas of Research
The NCMRC is currently focused on the following research areas:
- Corrosion in harsh environments
- Localized corrosion processes
- Corrosion prevention and control
- Electrochemical and corrosion modelling
Corrosion in harsh environments
Sulfide Stress Corrosion: Using Notch Tensile Slow Strain Rate Test to Evaluate a Nano-structured Steel Resistance to SSC
- Evaluate the susceptibility to sulfide stress corrosion cracking of both high strength low alloy carbon steels in sour service conditions as well as low yield point high ductile steels.
- Provide a consistent and reliable method to predict the threshold stress which initiates cracking (KISSCC). This parameter that can be used to quantify the susceptibility to cracking.
- Perform materials chemical composition characterization and imaging (EDS, WDS and ICPMS).
H2S/CO2 Corrosion of Steels at High Pressure High Temperature
- In-situ Electrochemical Testing on H2S/CO2 Corrosion in an Autoclave System
- Investigation of Supercritical CO2 Corrosion, Pitting Assessment by Electrochemical Testing, and Materials Selection
- Understand the correlation between the natural stresses and the artificial stresses
- Create and develop the environmental testing protocols in the lab to reflect more accurately the corrosion mechanism occurs in highly corrosive and natural environments
Internal Corrosion in Pipelines
- Investigation of the influence of flow velocity on the corrosion of metallic substrates exposed to different environments by electrochemical techniques and materials characterization analysis
- Evaluation of the performance of a coating in nonstationary conditions
- Modelling of the corrosion processes influenced by flow velocity based on electrochemical analysis.
Localized Corrosion Processes
Preferential Weld Corrosion (PWC)
- Develop methods for PWC assessment and evaluation of its corrosion inhibition
- Design of Electrode assemblies: weld, HAZ, and base metal
Investigation of PWC behavior and its mitigation by spatial resolution technique such as SECM
- Investigation of intergranular corrosion in welded zone of 316L stainless steel
- Investigation of exfoliation corrosion (EFC) of 2060 aluminum alloy in EXCO solution, modified EXCO solution, and MASTMAASIS environment
- Design of a single boss crevice former for studying crevice corrosion of stainless steel to perform immersion testing and electrochemical testing simultaneously and minimizes the unwanted galvanic corrosion in the cell
Localized Corrosion Mechanism in Aluminum Alloys
- Assessment of Pitting and Intergranular corrosion in Aluminum alloys after several processing
- Correlation between the microstructure (precipitates size and distribution, grain boundary misorientation), mechanical properties (Hardness, Tensile testing) and the localized corrosion resistance by characterization techniques (AFM, SIMS, SEM, EBDS, XRD)
- Identification and modelling of the localized corrosion mechanism (initiation and propagation)
Corrosion Prevention and Control
Multifunctional coatings for Corrosion Protection
- Investigation of the mechanisms of corrosion protection of coatings/metallic substrates exposed to different environments by electrochemical and materials characterization analysis.
- Development of deterministic models describing the evolution of the corrosion process
- Analysis of localized corrosion processes by localized electrochemical methods such as LEIS and SVET
Surface applied corrosion inhibitors for reinforced concrete
- Investigate the corrosion protection performance of different silane-based surface treatments applied on reinforced concrete specimens under wet/dry cyclic conditions
- Identify the mechanisms of corrosion protection of these surface treatments based on electrochemical, chemical, and morphology studies
Electrochemical and corrosion modelling
Electrochemical corrosion system modeling in meso-scale and continuum for multifunctional coatings
- Electrochemical corrosion based on deterministic and probabilistic approach
- Physics-based electrochemical modeling of sub-system degradation of coating through mechanics and electrochemistry
- Galvanic corrosion coupled kinetic process and mass transport with potential and local current distribution
Non-invasive Electrochemical Monitoring Techniques
- Investigation of in-situ monitoring and traditional ex-situ measurements of lithium and magnesium deposition