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This work was financed from the funds of the Ministry of Education and Science by Agreement No. DNK/
SP/513880/2021 of 22 December 2021, the project “14th School of Machining and the 43rd Scientific
School of Abrasive Machining”, under the programme “Perfect Science”.
The presented study concerned the comparison of the adhesive joints strengths of 1.0503 carbon steel sheets of
higher quality, which were made using adhesive compounds characterized by different viscosity index of the com-
ponents. Three types of commercial epoxy resins were used: Epidian 5, Epidian 53 and Epidian 57, as well as two
types of curing agents: polyamide (PAC) and amine (Z-1). The surfaces of the test specimens were subjected to
a pre-treatment operation in the process of a mechanical machining with an abrasive coated tool of P320 grada-
tion. The surface roughness measurements were carried out as a control. The single-lap adhesive joints were the
subject of the strength testing. The strength tests carried out on a Zwick/Roell Z150 testing machine concerned the
comparison of the strength of the adhesive joints loaded in shear. Statistical analysis was performed on the results
obtained. It was observed, among others, that the adhesive joints prepared with the epoxy adhesive compounds
containing the polyamide curing agent showed much higher the shear strength than the adhesive joints made with
the epoxy adhesive compounds containing the amine curing agent. Moreover, the use of the polyamide curing
agent in the adhesive compounds with the epoxy resins resulted in formation of a more elastic adhesive layer, for
which higher elongation was observed than in the case of the epoxy compound with the amine curing agent.
