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A 3-week corrosion testing of UNS N06625 was conducted in supercritical fluid at 350°C and 10 bars to simulate a geothermal environment where other alloys had been tested. Some localized corrosion occurred at a rate similar to previous results.
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A commercial corrosion inhibitor was used to quantify the level of corrosion mitigation of K55 casing material in simulated acidic geothermal electrolyte at different pH values and inhibitor concentrations.
Assessment of degradation mechanisms based on reviews of literature and operating experience from nuclear and nonnuclear applications, considering the long-term effects of these mechanisms on the integrity of Dry Storage Systems.
The stress corrosion cracking (SCC) susceptibility of 30Cr2Ni4MoV rotor steel welded joint in a 3.5 wt.% NaCl solution at 180 °C was investigated using slow strain rate tensile (SSRT) tests at different strain rates.
The effect of microstructure evolution induced by low-cycle fatigue behavior on the corrosion of welded joint in the simulated environment of low pressure nuclear steam turbine was comprehensively investigated.
The IDDP-1 well was the hottest flowing geothermal well in the world ~ 450 °C and 140 bar superheated steam that contained corrosive dissolved gases, H2S, CO2, H2, HCl and HF. The well had to be closed. Steel samples from down-hole were analyzed.
A multicomponent High Entropy Alloy (HEA) CoCrFeNiMo processed with vacuum arc remelting procedure was tested for corrosion in geothermal environment in the Reykjanes Geothermal Power Plant in Iceland.
Austenitic stainless, S31254, and Hastelloy, N10276, were clad on low carbon steel plates with explosive welding for testing in a geothermal environment. Results from visual inspection and microstructural & chemical composition analysis with a scanning electron microscopy and X-ray energy dispersive spectroscopy
The current paper presents examples of ongoing joint industry projects, of which the authors of this paper take part in one way or another.
Static exposure tests of pre-oxidized stainless steel and carburized chromium were conducted in the molten fluoride salt, LiF-NaF-KF (46.5-11.5-42 mol %), FLiNaK to simulate the corrosion environment typical of some advanced nuclear reaction concepts.
An adapted electrochemical noise (EN) technique was developed. This research presents the ability to embed “early warning” information within corrosion management strategies. The materials studied included a niobium stabilized stainless steel.
Our laboratory has investigated the causes of degradation of structural components of these gasifiers. In all cases, the likely causes of degradation have been determined and alternate materials identified.