Abstract

Herein, the friction stir processing (FSP) method was adopted to modify the microstructure of as-cast nickel aluminum bronze (NAB). The microhardness, cavitation erosion-corrosion mass loss, morphological damage and electrochemical tests were extensively examined. The results show that FSP can refine and uniform the microstructure of as-cast NAB alloy. FSP NAB alloy displays enhanced cavitation erosion resistance in distilled water and artificial seawater, as well as heightened sensitive to corrosive media in artificial seawater. Quantitative analysis of the synergistic effect between cavitation erosion and corrosion shows that pure cavitation erosion components contributions largest for as-cast NAB. In contrast, FSP NAB is greatly influenced by the synergistic effect component. The damaged surface shows that cavitation erosion mechanisms of as-cast NAB in distilled water and artificial seawater are similar, which is not the case for FSP NAB due to the synergistic effect between cavitation erosion and corrosion.

Graphic Abstract

中文翻译：

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人工海水中搅拌摩擦处理的镍铝青铜的空化腐蚀与腐蚀的协同效应

摘要

在本文中，采用摩擦搅拌处理（FSP）方法对铸态镍铝青铜（NAB）的组织进行改性。广泛检查了显微硬度，空化腐蚀-腐蚀质量损失，形态破坏和电化学测试。结果表明，FSP可以细化和均匀化铸态NAB合金的组织。FSP NAB合金在蒸馏水和人造海水中显示出增强的抗气蚀性能，并且对人造海水中的腐蚀性介质具有更高的敏感性。对空化侵蚀与腐蚀之间协同效应的定量分析表明，纯空化侵蚀组分对铸态NAB的贡献最大。相反，FSP NAB受协同效应成分的影响很大。

图形摘要