Autoclave testing of 13Cr and modified 13Cr stainless steels in simulated field conditions
Book
·
OSTI ID:106099
- British Gas plc, Newcastle Upon Tyne (United Kingdom)
The Armada complex of gas condensate fields located in the UK North Sea is to be developed. The corrosive nature of the produced fluids required the selection of corrosion resistant alloy tubular materials. The corrosion and sulphide stress cracking resistance of a standard 13Cr stainless steel and a 13Cr steel with a higher nickel and molybdenum content were investigated in simulated Armada field environments. The steels were exposed to simulated formation and condensed water, up to 1.46 MPa (212 psi) CO{sub 2} and up to 0.001 MPa (0.15 psi) H{sub 2}S. Neither steel suffered from sulphide stress cracking. The modified 13Cr steel remained passive in the simulated field environments. The standard 13Cr steel showed more complex behavior. In low chloride simulated condensed water, low rates of corrosion and no localized attack were found. In high chloride simulated formation water, pitting attack was observed at 20 C while at temperatures above 70 C scales formed on the metal surface. The results indicate that in these conditions pitting attack is a more significant threat than sulphide stress cracking.
- OSTI ID:
- 106099
- Report Number(s):
- CONF-950304--
- Country of Publication:
- United States
- Language:
- English
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