Tytuł pozycji:
Ocena przyczepności powłok regeneracyjnych metodą ultradźwiękową.
W pracy przeanalizowano rodzaje granic połączenia powłok regeneracyjnych z podłożem, podzielonych z uwzględnieniem kryterium akustycznego. Przedstawiono zasadę oceny przyczepności powłok regeneracyjnych metodą ultradźwiękową. Wyniki przeanalizowanych badań ultradźwiękowych i mechanicznych pozwoliły wskazać na rezerwę przyczepności.
The paper deals with an analysis of the results of evaluation of adherence of renovative coatings by ultrasonic method. The introduction consists of a reason and a goal of the work. Next, a classification and a discussion of the boundary between renovative coatings and substrate are contained. The length of the ultrasonic wave in a tested element was a criterion of the classification. According to this criterion, the boundaries can be divided into remelted, diffusive, with interlayers, adhesive and mixed. After that, an ultrasonic method of adhesion evaluation with the aid of longitudinal wave is presented. An ultrasonic measure of the adherence - a modulus of reflection coefficient of the ultrasonic wave on the boundary between coating and substrate, for the digital apparatus case, is presented and next described. The principle of measurement of the modulus and an interpretation of the pictures on the screen of the ultrasonic apparatus is also presented. For some particular cases of the bonds investigated, the adequate relationships between the adhesion and the modulus are comprised. The mechanical measure of the adherence was considered as a tearing strength of the coatings tested, and the mechanical tests acted as the duty of verifying method. As a result of the joint acoustic-mechanical method used, a reserve of the adherence was found. The reserve is shown in the work for general as well as for particular cases. On the reserve influence, most of all, technological conditions of forming of adhesive bonds between renovative coatings and steel substrate. In recapitulation, some of the most important conclusions of the investigations are inserted.
