通过对比5083和5059合金剥落腐蚀和晶间腐蚀试验结果，并采用金相显微镜观察合金显微组织在厚度方向上的不同，分析组织与耐腐蚀性能之间的关系。结果表明，5059合金的耐蚀性能优于5083合金。5083合金表面组织为部分再结晶组织和变形的纤维状组织，且析出相在晶界连续分布，不利于合金的耐腐蚀性能。5059合金Zn含量较高，表面组织为完全再结晶组织，且析出相均匀弥散断续分布，有利于合金的耐腐蚀性能。
By comparing of exfoliation corrosion and intergranular corrosion for 5083 and 5059 alloys, and using optical microscope to observe the microstructure in the different thickness direction, analyzes the relationship between microstructure and corrosion resistance of alloy. The results showed that the corrosion resistance of the 5059 alloy is better than 5083 alloy. The surface tissue of 5083 alloy is fibrous and recrystallization mix microstructure, precipitates continuously distributed in the grain boundary, is detrimental to the corrosion resistance. 5059 alloy content high Zn, surface tissue is completely recrystallized structure and precipitates discontinuous, which contribute to corrosion resistance.
2021,43(7): 1-4 收稿日期：2020-07-16
DOI：10.3404/j.issn.1672-7649.2021.07.001
分类号：TG146.2+1
作者简介：刘蒙(1984-),男,硕士,高级工程师,主要研究方向为材料学
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