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Simulating Porous Magnetite Layer Deposited on Alloy 690TT Steam Generator Tubes

机译:模拟沉积在690TT合金蒸汽发生管上的多孔磁铁矿层

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摘要

In nuclear power plants, the main corrosion product that is deposited on the outside of steam generator tubes is porous magnetite. The objective of this study was to simulate porous magnetite that is deposited on thermally treated (TT) Alloy 690 steam generator tubes. A magnetite layer was electrodeposited on an Alloy 690TT substrate in an Fe(III)-triethanolamine solution. After electrodeposition, the dense magnetite layer was immersed to simulate porous magnetite deposits in alkaline solution for 50 days at room temperature. The dense morphology of the magnetite layer was changed to a porous structure by reductive dissolution reaction. The simulated porous magnetite layer was compared with flakes of steam generator tubes, which were collected from the secondary water system of a real nuclear power plant during sludge lancing. Possible nuclear research applications using simulated porous magnetite specimens are also proposed.
机译:在核电站中,沉积在蒸汽发生器管道外部的主要腐蚀产物是多孔磁铁矿。这项研究的目的是模拟沉积在热处理(TT)合金690蒸汽发生器管上的多孔磁铁矿。在Fe(III)-三乙醇胺溶液中将磁铁矿层电沉积在Alloy 690TT基底上。电沉积之后,将致密磁铁矿层浸入以在室温下模拟多孔磁铁矿在碱性溶液中的沉积50天。通过还原溶解反应将磁铁矿层的致密形态改变为多孔结构。将模拟的多孔磁铁矿层与蒸汽发生器管的薄片进行了比较,这些薄片是在污泥喷枪过程中从真实核电厂的二次水系统收集的。还提出了使用模拟多孔磁铁矿样品的可能的核研究应用。

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