Study of vibration-damping properties of zinc electroplating deposited on a substrate of Cr18 gray cast iron
The presence of vibration loads in any node or unit almost always leads to negative consequences in one way or another. Vibrations affect both biological objects and materials. High level of vibrations, under certain conditions can even lead to the destruction of the surfaces of parts and node as a whole. The purpose of these studies was to study the vibration-absorbing ability of zinc electroplating, used to restore the seating holes of the housing parts of machines. The main task was to determine the presence and the level of vibration-absorbing ability of zinc in relation to grey cast iron SCh18. The research was carried out on a laboratory prototype of a gearbox (gear reducer) with the use of vibration sensors and an oscilloscope. As a result, the vibration damping ability of galvanic zinc was proved and the comparative level of vibration damping in comparison with Cr18 cast iron was determined. For this study, zinc was electroplated from sulfuric acid electrolyte on the inner surface of the cast iron shells. First, readings were taken without zinc plating, then a 0.1 mm zinc layer was applied and readings were taken. After obtaining the data, the zinc layer was removed mechanically, the next 0.2 mm coating layer was applied and the readings were taken. The process was repeated with a coating interval of 0.1 mm until the zinc electroplating thickness of 0.6 mm was reached.