Corrosion investigation of the 18Ni 300 grade maraging steel in aqueous chloride medium containing H2S and CO2
| Autor: | Adriana N. Correia, Archimedes F. Avelino, Walney Silva Araújo, Pedro de Lima-Neto, Diego Felix Dias, Luis P.M. dos Santos |
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| Rok vydání: | 2018 |
| Předmět: |
Austenite
Materials science Aqueous solution 020209 energy General Chemical Engineering Metallurgy 02 engineering and technology Thermal treatment engineering.material 021001 nanoscience & nanotechnology Chloride Corrosion Dielectric spectroscopy X-ray photoelectron spectroscopy 0202 electrical engineering electronic engineering information engineering Electrochemistry engineering medicine 0210 nano-technology Maraging steel medicine.drug |
| Zdroj: | Electrochimica Acta. 286:339-349 |
| ISSN: | 0013-4686 |
| Popis: | The corrosion behavior of the 18Ni 300-grade maraging steel in 0.6 mol L−1 NaCl solution, containing 1 mmol L−1 H2S, and saturated with CO2, was investigated by measurement of the open circuit potential, potentiodynamic polarization and electrochemical impedance spectroscopy techniques. The maraging steel was solution-treated at 840 °C for 1 h and aged at 650 °C for 3 h. All corrosion electrochemical tests proved that the austenitic phase formed during the aging thermal treatment was detrimental to corrosion resistance of the 18Ni 300-grade maraging steel. The analysis of the XPS spectra suggested that FeCO3, Fe2O3, FeS2, FeSO4, NiO, Ni(OH)2, NiS, NiSO4, MoO2, MoO3 and MoS2 were the corrosion products deposited on the surface of both maraging steel samples after 29 days of immersion in the testing solution. Lastly, for industrial application requiring the corrosion resistance property of the 18Ni 300 grade maraging steel, it is recommended that it be thermal solution-treated before its use. |
| Databáze: | OpenAIRE |
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