Chromium Coating of Wollastonite Filled Polyamide 6 and Evaluation of Thermal Cycle Strength

Authors : Ramiz AKAY, Hakan YAZICI
Pages : 107-122
Doi:10.58692/jotcsb.1345824
View : 80 | Download : 20
Publication Date : 2023-10-01
Article Type : Research Paper
Abstract :The chromium coating of plastic/polymer materials through electrolysis method has attracted attention for improving material properties. The most common material used to be coated is the Acrylonitrile Butadiene Styrene insert ignore into journalissuearticles values(ABS);, but has disadvantages compared to polyamides insert ignore into journalissuearticles values(PA);, such as low thermal resistance. PA’s high water retention disadvantage can be substituted by using fillers such as clay, etc; so in this study, 40% Wollastonite filled PA has been used for chromium plating to increase the thermal resistance of the PA. The plates used were produced by injection molding method. The research is focused on the effect of time and concentration on coating performance in etching, activation insert ignore into journalissuearticles values(by palladium); and accelerator processes. SEM and EDX were used to characterize samples for surface morphologies and the microstructures of etching, activation and accelerator in the PA sub-plates. Additionally, cross-cut adhesion test has been applied to analyze the adhesion power of the interfaces. It was found that the thermal resistance of the metal plate on the polymer surface decreased as the time increased, in relation with the increasing wearing time of the metal plate mentioned above. The thermal resistance decreased as the polymer deformed in relation with the increase in etching solution’s concentration. It is also seen that the thermal resistance improved as the activation time increased. The adhesion and the thermal resistance did not improve as the time in accelerator process increased. Furthermore, the cross – cut adhesion tests on the same samples concluded that the results are in agreement with the other thermal resistance results.
Keywords : Adhesion, electrolysis, chrome plating, plating on plastics, thermal cycle resistance

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