RT Journal Article SR Electronic A1 Guzanová, Anna A1 Draganovská, Dagmar A1 Tomáš, Miroslav A1 Janoško, Erik A1 Moro, Róbert T1 Surface Preparation when Joining Dissimilar Steels by Adhesive Bonding JF Acta Mechanica Slovaca YR 2020 VO 24 IS 4 SP 24 OP 34 DO 10.21496/ams.2020.033 UL https://www.actamechanica.sk/artkey/ams-202004-0004.php AB The paper deals with the application of different types of surface preparation before the formation of glued joints made of the same and different steels. Iron phosphate, chromate-free passivation and an experimental preparation based on organosilane were tested. Deep-drawn uncoated steel DC04 and HSLA galvanized steel HX340LAD+Z were joined by adhesive bonding. When applying all types of surface preparation, the joints´ strength was achieved at least at the level of the yield strength of weaker material (DC04). Surface preparation with organosilane leads to a bond strength that is close to the yield strength of a stronger material (HX340LAD+Z) and, therefore, can be recommended for bonding of steels with higher strength.