Corrosion testing in superheated geothermal steam in Iceland

S. N. Karlsdottir, K. R. Ragnarsdottir, I. O. Thorbjornsson, A. Einarsson

Rannsóknarafurð: Framlag til fræðitímaritsGreinritrýni

24 Tilvitnanir (Scopus)

Útdráttur

Corrosion testing was conducted in a superheated geothermal steam from the IDDP-1 well in Iceland at 360. °C for 113 days. Severe silica scaling occurred in the test. The average corrosion rate was extremely low; less than 0.1. mm/year for all the metals tested which can be explained by the combined protective effect of the silica and the high superheat in the steam preventing any condensation. Despite the low average corrosion rate, the microstructural analysis show that even the most corrosion resistant materials tested, such as UNS N06625 and titanium UNS R52400 show localized corrosion damage after the test. Only the low alloy stainless steels UNS S30403, UNS 31603 and UNS 31803 showed evidence of Stress Corrosion Cracking.

Upprunalegt tungumálEnska
Síður (frá-til)281-290
Síðufjöldi10
FræðitímaritGeothermics
Bindi53
DOI
ÚtgáfustaðaÚtgefið - jan. 2015

Athugasemd

Funding Information:
The authors wish to thank the Icelandic National Energy Company, Landsvirkjun for financial support and establishing pilot studies that were done at the IDDP-1 site. We would also like to thank the specialists Kristján Einarsson and Sigurður H. Markússon at Landsvirkjun for their collaboration and information regarding the IDDP-1 environment and the tests and the staff at the Krafla power plant for on-site support.

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