Wet Processes

Vacuum processes  Wet processes  Coatings and applications  Nanostructured thin layers

Thin films are developed by means of wet processes in presence of an organic or aqueous medium. Thickness can be controlled based on the type and conditions of the chosen process. We have several pilot plants that simulate some of the deposition processes on batch or continuous mode. These are the deposition techniques that could be applied:

spincoating dipcoating
Spin coating Dip coating
spraycoating rollcoating
Spray coating Roll coating

Mecánica Estructural

D.Materiales Metálicos   Mecánica Estructural  Soldadura   Equipamiento 

La unidad de Mecánica Estructural centra sus investigaciones en la evaluación de los productos, componentes y estructuras que deben operar de una forma segura y fiable en condiciones de servicio severas. Integra los aspectos del análisis de tensiones, los procesos de soldeo, el comportamiento de materiales y los mecanismos de fallo en el proceso de diseño de ingeniería.

MECÁNICA ESTRUCTURAL:

Servicios:

  • Caracterización del comportamiento de los materiales en condiciones de servicio.
  • Análisis experimental de deformaciones y tensiones (en laboratorio e in-situ).
  • Estudio de la Mecánica de la Fractura: determinación de KIC, JIC, CTODC y da/dN.
  • Caracterización a fatiga de alto y bajo número de ciclos (HCF, LCF).
  • Ensayos multiaxiales sobre componentes a escala real (actuadores lineales y rotativos).
  • Corrosión bajo tensión (SCC) y fragilización por hidrógeno (HIC).
  • Ensayos mecánicos a alta y baja temperatura.
  • Evaluación de la aptitud para el servicio (Fitness for Service).
  • Evaluación del comportamiento frente al desgaste a escala real.
  • Estudios de soldabilidad y diseño de procedimientos de soldeo.
  • Evaluación de las uniones soldadas: caracterización metalográfica y mecánica.
  • Estudios de reparación de soldaduras y/o recargues.
  • Desarrollo de procesos de soldadura robotizada.
  • Análisis de fallo.

 

Disbonding Test

Disbonding phenomenon takes place in hydroprocessing vessels of petroleum refineries under high pressure-high temperature gaseous hydrogen service.
These reactors are manufactured by weld overlay of stainless steel alloy onto a steel substrate.
The delamination of the stainless surface layer is generated in particular shutdown conditions. This phenomenon is known as Disbonding.

disbonding 1

ITMA Materials Technology has an equipment for performing the Disbonding test, which simulates service conditions in refineries, with the following characteristics:
- Testing up to 500ºC of temperature and 200bar hydrogen pressure.
- Total automation of pressure and temperature cycles.
- Cooling rate up to 750ºC/h.
For evaluating the percentage of disbonded area, an ultrasonic device with automated C-Scan mode is used.
A special device consisting of a bucket and two encoders (x, y) has been developed in order to provide, with two focussed immersion transducers, the highest precision of the percentage of such disbonded area.
Several furnaces are available to carry out stress relieve and special post-weld heat treatments.
Testing are always carried out according to ASTM G 146.

Disbonding 2

ITMA Materials Technology provides a Disbonding test service within a technological offer covering the following fields:


- R&D&I Projects. As an example, they can be focussed on:
      - Studying microstructural transformations.
      - Influence of cooling rate.
      - Study of welding parameters.
      - Post weld thermal treatments.
      - Influence of wall and weld overlay thickness.
      - Influence of the base material.
      - Influence of the cladding.
      - Temperature-Pressure behaviour.
- Technical Advisory

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