一种简单的表面处理,以提高AlMg合金的粘合性能和耐久性
Changfeng Fan1, Bo Yang2, Xue Wang3,4
1College of Intelligent Manufacturing and Control Engineering, Shandong Institute of Petrochemical and Chemical Technology, Dongying 257061, China.
Molecules (Basel, Switzerland)
|January 8, 2025
概括
用过氧化 (H2O2) 优化表面处理显著提高了结构粘合剂的粘合强度. 这种简单的方法确保了耐用的接头,这对于航空航天和汽车应用至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 表面工程是什么?表面工程是什么?
- 粘附科学 粘附科学 粘附科学
背景情况:
- 的结构粘合在飞机和汽车行业至关重要.
- 有效的表面准备对于在中实现高粘合强度至关重要.
- 表面的特性,如清洁度,粗度和化学成分,是受处理方法影响的关键因素.
研究的目的:
- 为了研究不同化学处理时间对的粘合粘合特性的影响.
- 在原始和退化的条件下使用环氧粘合剂评估粘合强度.
- 分析化学处理后的表面形态,化学和耐腐蚀性.
主要方法:
- 表面在不同的时间段被化学处理.
- 使用环氧粘合剂将处理过的表面粘合在一起.
- 进行了单 Lap-shear (SLS) 测试,以评估结合强度.
- 表面分析包括扫描电子显微镜/能量分散光谱 (SEM/EDX) 和电化学方法.
主要成果:
- 过氧化 (H2O2) 处理导致了很好的粘合力,粘合剂的凝聚力失败.
- 经过H2O2处理的样本实现了最高的初始键强度22.5 ± 0.5 MPa.
- 这些关节具有很高的耐用性,在老化后 (70°C,100%RH4周) 强度降低仅10%.
结论:
- 化学处理,特别是使用H2O2,是一种高效和简单的方法,可以增强粘合剂的粘合.
- 优化处理导致持久的结构连接,在恶劣的环境条件下具有出色的性能.
- 这种方法提供了一条简单的途径,可以在苛刻的行业中提高粘合结构的可靠性.
相关概念视频
01:09Colloidal precipitates
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
01:06Coagulation
Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...