This document describes materials testing and corrosion services provided by DNV GL. It discusses DNV GL's 18 laboratories across three continents that offer a broad range of testing services. These include consulting, research and testing, customized tests, failure analysis, and training. The document focuses on DNV GL's capabilities for corrosion studies including flow induced corrosion testing using large scale flow loops, rotating cylinder experiments, and autoclave testing. It also discusses computational modeling and analytical facilities for corrosion identification.

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Putting Our Expertise to the Test
DNV GL capability in Materials, Corrosion and Flow
Assurance Service
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Putting Our Expertise to The Test – DNV GL Global Laboratory
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DNV GL operates 18 laboratories across three continents,
offering a broad range of testing services.

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Global Insight, Local Expertise
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By combining advanced testing with technical expertise and industry standards, we help
customers to apply technology safely, efficiently and cost effectively.

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DNV GL Laboratory Service - CAPEX, OPEX, DECOM
 Services
 Consulting – fitness for service, materials
selection, design
 Research and testing
 NACE, API, ASTM, ISO, BS, etc.
 Customized tests
 Prototype development
 Root cause analysis, failure analysis and
forensic investigations
 Training, Workshops, Guidelines
Toolbox
 Laboratory Testing
 Simulations – OLI, FEA, COMSOl,
Multicorp, SPPS
 Network – MTI, API, NACE, NSF
 Global Experience
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Corrosion Study Services
Corrosion
 Flow Induced Corrosion Study
• Flow Loop
• Rotating Cylinder Experiments
• Rotating Cage Experiments
 Stress Corrosion Cracking Study
 Sulfide Stress Cracking Study
 Galvanic Corrosion Study
• Sacrificial Anode
 Localized Corrosion Evaluation
• Pitting
• Crevice
• Coating Evaluation
• Environmental Exposure Study
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Corrosion Testing – Tool Box
Our global facilities are equipped to study corrosion under user-specified/standard
conditions using a variety of methodologies:
 Electrochemical Testing Capability
• Linear Polarization Resistance (LPR)
• Electrochemical Impedance Spectroscopy (EIS)
• Electrochemical Noise (EN)
• Galvanic Currents (Weld Testing)
• Potentiodynamic Polarization Studies
 Autoclave Testing for HPHT applications
• General Exposure Studies under static and dynamic conditions.
• Real time corrosion monitoring using electrochemical methods in static conditions
 Flow Loop Studies
 Spool Test Studies
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Flow-Induced Corrosion Study:
Large Scale Multiphase Flow Loop
 4-inch Diameter Pipe Systems
– Operating pressure: up to 14 bars
– Operating temperature: RT -130C
– Superficial gas velocity: 0 – 18 m/s
– Superficial liquid velocity: 0.01 – 2.2 m/s
– Liquid viscosity range: 0.5 – 300 cP
– Solids capability
 Multiphase Flow Technologies
– Multiphase flow characteristics (flow
pattern study)
– Flow monitoring
– Flow improved (e.g. drag reducing agent)
– Corrosion and solids management
– Evaluation of corrosion inhibitors
– Material Selection
– Development of in-line separator
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Flow-Induced Corrosion:
Single Phase Flow Loops
 Two 1” ID flow loops
 Tank Size: 30 gallons
 316L Stainless steel
 Max Pressure: 300psi
 Max Temperature: 300F
 Max Liquid Viscosity: 100cP
 Flow Rate: 10 -120 GPM at 150psi
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Flow-Induced Corrosion:
Rotating Cylinder Electrode and Rotating Cage
 Rotating Cylinder Electrode (RCE)
– Specimen Geometry: Cylindrical
– 1 to 4 specimens per test (coupon holder
design)
– P/T limits: 3500 psi @ 350C
– Advantages
– Relatively low cost testing approach
– Well characterized hydrodynamic
conditions
– CO2 and CO2/H2S conditions simulated
– Electrochemical measurements could be
implemented to monitor real corrosion
rate.
 Rotating Cage (RC)
– Specimen Geometry: Flat (approx
4”x3”x1/16”)
– 4 to 8 specimens per test (hydrodynamics
will depend on number of specimens)
– P/T limits: 3500 psi @ 350C
– Advantages
– Relatively low cost approach
– CO2 and CO2/H2S conditions can be
simulated
– Disadvantages
– Potential edge effects not beneficial for
coating applications
– ASTM round robin results indicate very
significant dispersion results at well
known corrosive conditions
– Results indicate average performance
over testing time
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Flow-Induced Corrosion:
Rotating Cylinder Electrode and Rotating Cage
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Flow-Induced Corrosion:
CO2 corrosion and It’s Inhibition – Rotating Cage Autoclave
 Rotating Cage Autoclave (RCA) to evaluate inhibitors at high temperature and high
pressure.
 Weight loss measurement to determine inhibited corrosion rate.
 Rotating speed to simulate equivalent wall shear stress.
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Localized Corrosion: ASTM G61 Testing
Cyclic Potentiodynamic Polarization Critical Crevice Temperature Study
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Sour Service Studies
 Our labs are capable of running fracture toughness and fatigue studies in
a range of environments including HPHT Sour environment frequently
encountered in today’s O&G production. The studies include but are not
limited to
 SSC SCC Study – NACE MR0175/ISO 15156, NACE TM0169/ASTM G31, ASTM G111, NACE
TM00177, EFC 16, EFC 17, ASTM G38, ASTM G35, NACE TM0284, NACE TM0198
 Hydrogen Induced Cracking – NACE TM0248, OTI 95 635
 Fatigue Crack Growth Rate Study – ASTM E647, ASTM E1681
 S/N Fatigue Curve Determination – ASTM E399, ASTM E1380, BS7446, ASTM G148
 Slow Strain Rate Testing
 ECA & FFS – DNV OS-F101, DNV RP – F108
 Sour Electrochemistry – ASTM G3, ASTM G59
 Sour Inhibitor Evaluation – ASTM G170, ASTM G184, ASTM G185, ASTM G208
 Polymer & Lining Evaluation – NORSOK M-170, NACE TM0187, NACE TM0174, NACE
TM0185, NACE TM0183, NACE TM0192, NACE TM0296, NACE TM0297, NACE TM0298
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Custom Testing – Autoclave Exposure Testing
 Simulated environments for stressed/non-
stressed specimens
– Hydrogen Induced Cracking (HIC)
– Sulfide Stress Cracking (SSC)
– Ammonia Cracking
– Aqueous corrosion at high temperature
and pressure
 NACE standard tests
– O&G Applications
 Customer specific
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Custom Testing – Autoclaves Capability in Columbus, USA
 Hastelloy Autoclaves (38 vessels)
– Up to 19L volume
– Up to 10,000 psig MAOP
– 1 x 10L @ 10,000 psig vessel
– 9 x 5L @ 5,000 psig vessels with stirring
 Atlas Cells (C-276) – 6 vessels
– Coated Panel testing at up to 2800 psig
 Other Autoclaves (18 vessels)
– Stainless steel modules up to 22L
– PTFE lined carbon steel vessel – 32L
– 4 x 4-5L @5,000 psig
 Liquid Loading of H2S
 High pressure syringe pump and multiple
air-operated booster pumps to achieve high
pressures at high temperatures
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Custom Testing - Autoclave Capability in Singapore
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Sizes Test Capacity
1 x 5L C276 Autoclave 350DegC/300 Bar
4 x 15L 32760 Autoclaves 200DegC/100 Bar

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Computation Modelling Tools
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COMSOL modelling for hydrogen atom
distribution in a CT sample exposed to H2S
for 4 days
 OLI: Speciation and Corrosion Modelling
 COMSOL
• Multiphysics modelling
• CFD
• Structural Mechanics
• Chemical Reaction Engineering
• Electrochemistry
 Abaqus: Mechanical Modelling
 MARV: Bayesian Network based risk
assessment
 Multicorp: Corrosion rate calculations in
multiphase flow conditions (Ohio
University JIP member)
 SPPS: Erosion rate calculations in
multiphase flow conditions (University of
Tulsa JIP member

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Flow Assurance Services and Tools
 Wax Inhibition
• Wax Prediction using simulator codes
– Profes Wax, Tulsa University Wax
V4.0, Gas Vle, Multiflash
• Wax Properties Testing - Wax
content, MP, Pour point, oil content,
carbon number distribution
 Hydrate Inhibition
 Corrosion Inhibition
 Erosion – Corrosion
• Tulsa University JIP member - SPPS
software (erosion predictions)
• Ohio University JIP member –
Multicorp software (pipeline
corrosion predictions)
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Wax Formation
Hydrate Formation

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Analytical Facilities
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A comprehensive suite of analytical
facilities for detailed understanding of
materials and corrosion identification
studies and incident investigations
 Optical and electron microscopy
 SEM-EDX
 Infra-Red (IR) spectroscopy
 Raman Spectroscopy
 Fluorescence Spectroscopy
 Thermo-gravimetric analysis (TGA)
 Gas Chromatography
 GC- Mass Spectrometry
 Inductively coupled plasma mass
spectrometry (ICPMS)
 Diffusible Hydrogen Determinator
 Optical Emission Spectroscopy

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Thank You
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