The Impact of Selected Technological and Material Parameters on the Strength of Adhesive Steel Sheets Joints

Abstract

The following paper analyses selected problems regarding the impact of technological parameters and the type of adherend material on the strength of adhesive-bonded steel sheet joints. The subject of the test was a single-lap adhesive joint of S235JR steel sheet. Joints were formed on two types of substrates: with or without corrosion products on the surface. The surface of steel sheet adherends was pre-treated with three cleaning solutions: acetone, Wiko industrial degreasing agent and Cortanin F anti-corrosion agent, depending on the state of the surface. Adhesive joints were formed with Epidian 53/ET/100:15 epoxy adhesive. The formed joints were subjected to one of three ageing variants: 14 days, two months and 3 months, which were followed by destructive testing to determine the shear strength of joints. The analysis of results obtained in the tests indicates that the strength performance of adhesive joints of corrosion-free adherends was characterised by higher values than in corroded steel sheets, regardless of ageing time.

Strength of Epoxy-Bonded Aluminium Alloy Joints after Sandblasting

“…A proper preparation of the bonded surface includes the operations, thanks to which the surface layer will be characterised by very high activity [17][18][19][20][21][22]. This process enables to remove the dirt from the material, increase wettability, modify the surface's geometry, develop it properly, and increase the surface free energy [20][21][22][23][24][25][26][27][28][29][30]. Selection of the surface treatment method before the bonding process depends on, among others, the used material and its structure [2,5,12,22,27].…”

“…This process enables to remove the dirt from the material, increase wettability, modify the surface's geometry, develop it properly, and increase the surface free energy [20][21][22][23][24][25][26][27][28][29][30]. Selection of the surface treatment method before the bonding process depends on, among others, the used material and its structure [2,5,12,22,27]. Other surface treatment methods are recommended for steel [26,[31][32][33], which is diff erent for metals and metal alloys e.g.…”