Simulating industrial processes in the laboratory requires facilities to safely handle high temperatures and high pressures, highly corrosive chemicals and toxic materials, as well as the ability to mechanically load test samples during exposure. The high temperature and high pressure (HTHP) laboratory of TECNALIA has autoclaves, mainly focused on sour and non-sour applications. Corrosion and cracking phenomena which may result from exposure of steels and alloys to H2S, CO2 and brines, are carefully assessed. For more information https://www.tecnalia.com/en

1. WHAT DO WE OFFER
Our corrosion testing services cover a full range of
environmental testing simulations in autoclaves for sour
and non-sour applications, including :
 HTHP autoclaves to simulate sour/non sour
service environments
 Corrosion rate determination
 Specialise in materials qualification for sour
service applications
 Environmental cracking tests: sulphide stress
cracking (SSC), stress corrosion cracking (SCC)
tests, hydrogen induced cracking (HIC), etc.
 Corrosion inhibitor performance
 Electrochemical corrosion testing in autoclaves
 Rigorous methodologies to ensure the integrity of
the tests e.g. H2S saturation, temperature, pH,
oxygen (ppb level)
 Our quality control system complies with ISO
17025 (ENAC nº4/LE063)
HIGH TEMPERATURE AND HIGH PRESSURE
CORROSION TESTING AUTOCLAVES
Simulating industrial processes in the laboratory requires
facilities to safely handle high temperatures and high
pressures, highly corrosive chemicals and toxic materials,
as well as the ability to mechanically load test samples
during exposure. The high temperature and high pressure
(HTHP) laboratory of Tecnalia has autoclaves, mainly
focused on sour and non-sour applications. Corrosion and
cracking phenomena which may result from exposure of
steels and alloys to H2S, CO2 and brines, are carefully
assessed.
HTHP AUTOCLAVES
10 autoclaves: 2 autoclave systems mounted in slow
strain rate (SSR) loading mode and eight static
autoclaves,
- Design pressure up to 350 bar and temperatures up
to 400 °C
- 45 kN SSRT autoclaves
- Volumes from 2 to 5 liters
- Available in different materials of construction:
Hastelloy C276 and zirconium
- Non-stirred / stirred autoclave system (50-3000 rpm)
HTHP CORROSION TESTING
1. HPHT H2S/CO2 exposures for environmental
cracking and corrosion rate evaluation
Corrosion behavior of materials in the service environment is an important
factor for selection of materials in processing plants, refinery applications or
environments containing corrosive species such as CO2, H2S and chlorides.
Corrosion rate determination: ASTM G111, ASTM G28, NACE TM0169.
Pitting and crevice corrosion testing: ASTM G48.

2. TECNALIA
Parque Científico y Tecnológico de Gipuzkoa
Mikeletegi Pasalekua, 2
E-20009 Donostia - San Sebastián (Gipuzkoa)
T 902 760 000*
T +34 946 430 850 (International calls)
TECNALIA is the first private applied research center
in Spain and one of the most important in Europe. A
combination of technology, tenacity, efficiency,
courage and imagination.
As we are aware that the world evolves rapidly, we get
ahead of future challenges by turning technology-
based business opportunities into competitive
advantages.
Contact
Raúl Caracena
Raul.caracena@tecnalia.com
Qualification of materials upon laboratory testing in accordance with the NACE
MR0175/ISO 15156.
Test methods for the evaluation of materials for wet H2S service:
- Hydrogen induced cracking (HIC) test : NACE TM0284, NACE TM0177
- Stress orientated hydrogen induced cracking (SOHIC) test: NACE TM0103,
NACE TM0177
- C-ring (CR) test : NACE TM0177, Method C
- Four-point bend (4PB) tests : NACE TM0316, ISO 16540
5. Electrochemical Testing
3. Sulphide stress cracking testing
- Electrochemical corrosion testing in autoclave
- Corrosion rate, crevice and pitting corrosion resistance
- Linear Polarization Resistance (LPR) and Cyclic Potendiodynamic Polarization techniques: ASTM G5, ASTM G59,
ASTM G61, ASTM G102
- Corrosion inhibitor performance
- Compatibility testing and Rotating Cylinder Electrode (RCE) testing
- Laboratory methodologies to evaluate corrosion inhibitors for oil field application : ASTM G185, ASTM G170
4. Evaluation and Selection of Corrosion Inhibitors
2. Slow strain rate test (SSRT)
The SSRT is a method used for screening corrosion-resistant
alloys (CRA) used in oilfield production environments.
The SSR test for resistance to SCC uses slow, dynamic strain
applied at a constant rate.
SCC susceptibility is evaluated according to NACE TM-
0198 and ASTM G-129.
Advanced post-test analysis techniques
Optical and electron microscopes, energy-dispersive X-ray spectroscopy (EDX), X-
ray diffraction (XRD), and RAMAN analysis of corrosion products.