Corrosion behavior and mechanism of laser additive manufactured Ni-based alloy in CO2 environment at different temperatures and pressures
Materials Today Communications(2023)
摘要
This paper reports the effect of temperature and CO2 partial pressure on the corrosion behavior and mechanism of LAM Ni-based alloy in oilfield produced water. The passive current density and critical current density of LAM Ni-based alloy increased, while pitting potential and thickness of passive film decreased as the increase of temperature and CO2 partial pressure. Pitting corrosion was found at the interface between γ-Ni and inclusions, while the occluded cell corrosion (OCC) was formed by the deposited layer of CaCO3. The OCC worsened pitting corrosion was the main degradation mechanism of LAM Ni-based alloy. The findings provided theoretical guidance for understanding CO2 behavior and mechanism in LAM alloys.
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关键词
corrosion behavior,alloy,laser,co2,ni-based
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