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利用磁致伸缩空蚀试验饥研究了ZQMn12-8-3-2高锰铝青铜在2.44%NaCl溶液中的空蚀行为.结果表明:空蚀作用致使ZQMn12-8-3-2高锰铝青铜的自腐蚀电位正移.在腐蚀与空蚀的交互作用中,力学因素起了至关重要的作用,腐蚀因素作用相对较小、腐蚀因素作用相对较小.微裂纹首先在a/k相界的a相部分形成;随着空蚀的进行,这些微裂纹在a相内合并展导致a相失重,K相也随之剥离基体.空蚀微裂纹易于横向扩展而向深度方向受阻.试样表面均匀剥落,未出现大的海绵状的空蚀坑.
The cavitation erosion behavior of ZQMn12-8-3-2 high manganese aluminum bronze in 2.44% NaCl solution was studied by using magnetostrictive cavitation erosion test.The results show that the cavitation erosion causes ZQMn12-8-3-2 high manganese aluminum bronze Of corrosion potential positive shift in the interaction between corrosion and cavitation, mechanical factors play a crucial role, the role of corrosion is relatively small, the role of relatively small corrosion.Microcracks first in the a / k phase boundary Of the a-phase part of the formation; With the cavitation erosion, these micro-cracks in the a-phase merger exhibition led to a phase loss of weight, K phase also will be stripped from the matrix. Cavitation micro-cracks easily lateral expansion to the depth direction. Even surface spalling, there is no large sponge-like pits.