Community Research and Development Information Service - CORDIS


The objective of this research project is:

- To set up testing procedures in order to study stress corrosion resistance also with the aid of fracture mechanics in highly aggressive environments, characterized by high partial pressures of CO(2) and H(2)S and temperatures up to 200 C;
- To evaluate the effect of surface films on the corrosion and stress corrosion resistance of the materials;
- To define application limits, also based on engineering diagrams, for quenched and tempered steels and stainless steels to be used in oil and gas and in geothermal fields characterized by high CO(2) partial pressure.

The experimentation has been carried out on the following materials:

- Drill pipes for geothermal drilling:
. AISI 4137H, traditionally used for the drill pipe body;
. API G105, traditionally used for joints (both these materials being tested also after electroslag remelting (ESR) procedure);
. UNI 30NiCrMo 12 (BT30 ESR): Ni containing low alloy steel with improved toughness;

- Tubing for reinjection geothermal wells and for gas and oil extraction:
. AISI 4130 - API C-90 carbon steel;
. 13Cr martensitic stainless steel UNS S42000;
. 22Cr duplex stainless steel UNS S31803;
. 28Cr supermartensitic alloy UNS N08028.
oy UNS N08028.

Additional information

Authors: BARTERI M, Centro sviluppo materiali SpA, Roma (IT)
Bibliographic Reference: EUR 16681 IT (1997) 93pp., FS, ECU 16.50
Availability: Available from the (2)
ISBN: ISBN 92-828-0231-0
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