Adhesive bonding of stainless steels and their component metals

The purpose of the current study was to evaluate the bond strength of a met al adhesive system bonded to stainless steels and their component metals. T wo sizes of disk specimens (10 and 8 mm in diameter x 2.5 mm thickness) wer e machined from two stainless steels designed for magnetic attachment (AUM2 0 and SUS 316L), as well as from high-purity chromium (Cr) and nickel (Ni) metals for reference. The specimens were air-abraded with alumina, either p rimed with a metal conditioner (Cesead II Opaque Primer) or left unprimed, and bonded with an adhesive resin (Super-Bond Opaque). Shear bond strengths were determined before and after thermocycling, and the results were analy sed by analysis of variance (ANOVA). Post-thermocycling bond strengths of t he unprimed groups were 16.3 MPa for the AUM20 ahoy, 7.5 MPa for the SUS 31 6L, alloy, 31.1 MPa for Cr and 3.1 MPa for Ni. Those of the conditioned gro ups were 30.3 MPa for the AUM20 alloy, 32.9 MPa for the SUS 316L alloy, 39. 3 MPa for Cr and 13.1 MPa for Ni. Application of the conditioner elevated t he bond strengths of all groups (P < 0.05). It can be concluded that combin ed use of the conditioner and the Super-Bond adhesive is effective for bond ing the stainless steels examined, and that Cr is a suitable component for the bonding system in question.