Protective layer formed during surface treatment of workpiece such as bodywork parts of motor vehicle in automotive industry, has electrically insulating layer made of alumina or zirconium oxide, which is formed under rejection layer

摘要

The protective layer comprises a rejection layer (28) made of PTFE, formed on a base material (24). An electrically insulating layer (26) is formed under the rejection layer. The electrically insulating layer is made up of alumina or zirconium oxide. Independent claims are included for the following: (1) workpiece conveyor; (2) surface treatment plant; and (3) method for producing protective layer.