Method for protecting film layer of motorcycle exhaust gas purification catalytic converter during electroplating process

The present invention discloses a method for preparing a protective film layer of a motorcycle purification catalytic converter, which is composed of an iron-chromium-aluminum honeycomb body and a catalyst coating coated on the surface of the iron-chromium-aluminum honeycomb body during electroplating. The steps include: impregnating at least one layer of composite organic non-metallic heat-resistant protective film layer on the surface of the catalytic converter. The present invention adopts a composite organic non-metallic heat-resistant protective film layer to solve the problem of erosion, rust, corrosion and shedding of the catalytic converter by the electroplating liquid during the electroplating process of the muffler, which leads to the degradation of the performance of the catalytic converter; during the initial use of the engine, the composite organic non-metallic heat-resistant protective film layer immediately burns and disappears under the action of the exhaust gas temperature, thereby ensuring that the catalyst layer normally participates in the catalytic reaction when the engine is working.