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利用强流脉冲离子束(C+、H+)对变形镁合金AZ31的挤压态靶材分别进行0、1、30和50次辐照试验,分析辐照前后物相组成,检测随辐照次数增加靶材表面的显微硬度,并通过阳极氧化和盐雾试验检测耐蚀性能。结果表明,随HIPIB辐照次数增加,靶材表面显微硬度呈提高趋势,50次辐照表面显微硬度270 HV0.01,较原始靶材的63.7 HV0.01提高了3倍多;极化曲线显示自腐蚀电位和击穿电位提高,自腐蚀电流减小,30次辐照的自腐蚀电位达到-1363 mV,钝化区间为1065 mV;辐照处理后在盐雾试验中形成钝化膜使靶材腐蚀速率显著降低了65%,耐蚀性能得到较大改善。
The impacted target of AZ31 magnesium alloy was subjected to 0, 1, 30, and 50 irradiations with a pulsed ion beam (C +, H +). The phase composition of the AZ31 magnesium alloy before and after irradiation was analyzed. The microhardness of the target surface was measured and the corrosion resistance was tested by anodic oxidation and salt spray tests. The results showed that the microhardness of the target surface increased with the increase of HIPIB irradiation number. The microhardness of 50 irradiated surface was 270 HV0.01, which was three times higher than that of the original target of 63.7 HV0.01. The curves show that the self-corrosion potential and the breakdown voltage increase, the self-corrosion current decreases, the self-corrosion potential of 30 cycles reaches -1363 mV and the passivation interval is 1065 mV. After passivation treatment, a passivation film is formed in the salt spray test The target corrosion rate was significantly reduced 65%, corrosion resistance can be greatly improved.