Surface Pre-Treatment of Batch-Galvanized Components for Adhesively Bonded Assemblies

The strength of adhesively bonded joints depends on the cohesive strength as well as on the adhesion between the adhesive and adherent. In case of batchgalvanized steel, using zinc coating, the composition of the zinc layer and zinc layer phases can have a crucial impact on the compound’s stability. In order to produce reliable and durable bonds the zinc layer surface has to be pretreated. Suitable preparation methods for the terms of the constructive industry must be chosen in respect to the specific surface characteristics of the zinc coating. Compared to the sweep-blasting process, pickling offers an economical surface pre-treatment method for the batch-galvanized components.