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首页> 外文会议>Corrosion conference and expo >Comparison of Corrosion and Cavitation Erosion Behaviors between the As-cast and Friction-stir Processed Nickel Aluminum Bronze
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Comparison of Corrosion and Cavitation Erosion Behaviors between the As-cast and Friction-stir Processed Nickel Aluminum Bronze

机译：铸造摩擦加工镍铝青铜腐蚀和空化腐蚀行为的比较

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An as-cast nickel aluminum bronze (NAB) was treated by friction-stir processing (FSP). Immersion test up to 82 days was carried out to investigate the long term corrosion behavior of the as-cast and as-FSP NAB. The polarization curves and electrochemical impedance spectroscopy (EIS) were also measured to investigate the corrosion behavior of short term under cavitation conditions. Mass loss measurements and surface morphology observations were conducted to investigate the cavitation erosion behavior for the as-cast and as-FSP NAB in both distilled water and 3.5 wt. % NaCl solution. The immersion test indicated that the impedance of the as-FSP NAB was much higher than that of the as-cast one. In distilled water under cavitation condition the cumulative mass loss of the as-cast NAB were about 1.5 times as large as that of the as-FSP one. In 3.5 wt. % NaCl solution the mass loss increased greatly for the as-cast NAB while slightly for the as-FSP one. The higher corrosion and cavitation erosion resistance for the as-FSP NAB was attributed to its modified microstructure. Under cavitation condition, the coarse-grain and inhomogeneous microstructure of the as-cast NAB caused severe phase boundaries damage and the great mass loss resulted in large and deep cavities.
机译：通过摩擦搅拌加工（FSP）处理铸造镍铝青铜（NAB）。浸渍试验高达82天，以研究铸型和FSP NAB的长期腐蚀行为。还测量偏振曲线和电化学阻抗光谱（EIS）以研究空化条件下短期的腐蚀行为。进行质量损失测量和表面形态观察，以研究蒸馏水和3.5重量％的蒸馏水和AS-FSP Nab的空化腐蚀行为。 ％NaCl溶液。浸渍试验表明，AS-FSP nab的阻抗远高于AS-铸造的阻抗。在空化条件下蒸馏水，铸造NAB的累积质量损失约为AS-FSP一体的1.5倍。在3.5 wt。对于AS-FSP One的略微施放，大量NaCl溶液大大增加的质量损失大大增加。 AS-FSP nab的较高腐蚀和空化抗蚀性归因于其改进的微观结构。在空化条件下，AS浇铸Nab的粗晶和不均匀的微观结构导致严重的相界损伤，大量损失导致大而深。

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