Preparation process of corrosion-resistant and high-temperature-resistant PTFE (Polytetrafluoroethylene) coating for aluminum alloy impeller of expansion machine

The invention discloses a preparation process of a corrosion-resistant and high-temperature-resistant PTFE (Polytetrafluoroethylene) coating for an aluminum alloy impeller of an expansion machine, belongs to the technical field of surface treatment, and solves the problem of poor corrosion resistance of an expansion machine impeller in an existing hydrogen energy automobile in a high-temperature water mist environment. The coating disclosed by the invention is safe and environment-friendly, has excellent hydrophobic performance and excellent corrosion-resistant effect, the processing method is stable and easy to operate, the surface of the prepared coating can continuously work at high temperature, liquid is not easy to adhere to the coating, an impeller base body can be effectively protected, and the service life of the impeller of the expansion machine is prolonged. 本发明公开了一种膨胀机铝合金叶轮耐腐蚀耐高温PTFE涂层的制备工艺，所述涂料的主要组成成分为聚四氟乙烯，属于表面处理技术领域，它解决了现有氢能源汽车中膨胀机叶轮在高温水雾环境下耐腐蚀性能差的问题。本发明的涂料安全环保，具有优异的疏水性能，耐腐蚀效果优异，加工方法稳定易操作，所制备涂层表