This study created ceramic preforms with a 3D network structure (TAD3D) by using treated aluminum dross (TAD) and kaolin slurry, with 30 ppi polyurethane foam as a template via the sacrificial template method. TAD3D/5A05Al composites were then produced via pressureless infiltration of 5A05Al aluminum alloy into TAD3D. The corrosion behavior and resistance of TAD3D/5A05Al in salt spray were assessed via neutral salt spray corrosion (NSS), scanning electron microscopy (SEM), potentiodynamic polarization (PDP), and electrochemical impedance spectroscopy (EIS) tests. The results showed that after 24 to 360 h of NSS corrosion, the corrosion of the 5A05 matrix was primarily pitting, with pits expanding and deepening over time, and showing a tendency to interconnect. The main corrosion products were MgAl2O4, Al(OH)3, and Al2O3. As corrosion progressed, these products increased and filled cracks, pits, and grooves at the composite interface on the material’s surface. Corrosion products transferred to the grooves at the composite interface and grew on the ceramic surface. Corrosion products on the ceramic framework and the Al matrix can form a continuous passivation film covering the composite surface. PDP and EIS results indicated that the composite’s corrosion resistance decreased by 240 h but increased after that time. After 240 h, the surface passivation film can weaken corrosion effects and enhance the composite’s resistance, although it remained weaker than that of the uncorroded samples. Additionally, grooves at the composite interface deepened over time, with loosely structured corrosion products inside, potentially leading to severe localized corrosion.

中文翻译：

---

30 ppi TAD3D/5A05Al 复合材料在中性盐雾腐蚀中的腐蚀行为

本研究利用处理过的铝渣（TAD）和高岭土浆料，以30 ppi的聚氨酯泡沫为模板，通过牺牲模板法制备了具有3D网络结构（TAD3D）的陶瓷预成型件。然后通过将 5A05Al 铝合金无压浸渗到 TAD3D 中来生产 TAD3D/5A05Al 复合材料。通过中性盐雾腐蚀（NSS）、扫描电子显微镜（SEM）、动电位极化（PDP）和电化学阻抗谱（EIS）测试评估了TAD3D/5A05Al在盐雾中的腐蚀行为和耐腐蚀性能。结果表明，NSS腐蚀24~360 h后，5A05基体的腐蚀以点蚀为主，点蚀随时间推移不断扩大、加深，并呈现互连趋势。主要腐蚀产物为MgAl2O4、Al(OH)3、Al2O3。随着腐蚀的进行，这些产物增加并填充了材料表面复合界面处的裂纹、凹坑和凹槽。腐蚀产物转移到复合材料界面的凹槽并在陶瓷表面生长。陶瓷骨架和铝基体上的腐蚀产物可以形成覆盖复合材料表面的连续钝化膜。 PDP 和 EIS 结果表明，复合材料的耐腐蚀性在 240 小时内下降，但此后又有所增加。 240小时后，表面钝化膜可以减弱腐蚀作用并增强复合材料的抵抗力，尽管其仍然弱于未腐蚀的样品。此外，复合材料界面处的凹槽随着时间的推移而加深，内部结构松散的腐蚀产物，可能导致严重的局部腐蚀。