Oxidation limits should be studied carefully due to their effects on the bonding mechanism between polymer and metal

Abstract

The project investigates an important and uninhabitable subject, which is bonding dissimilar materials such as - metal and making a joining between them, so the making a join between these materials. The samples from different materials were prepared to make a joint between them. The dissimilar materials used are the stainless steel alloy of grade 440; these alloys join with the polymer high-density polyethylene(M300054). After the preparation, the alloy samples were put in an atmospheric tube face; many experiments were performed to determine the conditions ( temperature and holding time ) that under it, the sample's surface would oxidize, and a layer of oxide would grow on the surface of the sample. The powdered polymer was then placed on the oxidized surface of the samples. Then, many experiments were performed to determine the conditions of the powder wetting the sample's surface. AFM uses the selected alloys to determine the best oxidation condition, and t weight gain is measured to determine that the best oxidation U condition is at a temperature of 500 C and a holding time of 60 minutes. The wetted filler is used to verify the bonding between the sample stainless steel and the polymer. The polymer was bonded at a temperature of 500 ° C and a holding time of 1 hour; the joining strength equals approximately 2 MPa. Keywords: Oxidation limit, polymer, metal