The flow-accelerated corrosion (FAC) behavior at different bending angles in bend pipe in simulated secondary circuit water environment of pressurized water reactor (PWR) was investigated. The results indicated that the FAC rates at different bending angles within the bend pipe strongly depended on the ferrite nanocrystallization degree and the mass transfer coefficients. Ferrite nanocrystallization played a dominant effect on FAC, and the mass transfer coefficient played a secondary role on FAC, causing the maximum FAC rate in bend pipe was transferred to the 45° position on the intrados.

中文翻译：

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SA 106B冷弯管微观结构和弯曲角度对模拟压水堆二回路水环境流动加速腐蚀行为的影响

研究了模拟压水堆（PWR）二回路水环境中弯管不同弯曲角度下的流动加速腐蚀（FAC）行为。结果表明，弯管内不同弯曲角度的 FAC 速率强烈依赖于铁素体纳米化程度和传质系数。铁素体纳米晶对FAC起主导作用，传质系数对FAC起次要作用，导致弯管内最大FAC速率转移到内弧线45°位置。