Impregnation history

• Impregnation began in the 1930s, and was based on inorganic extract containing mainly simple impregnation, and laterevolved to include internal pressure.Immersion-style gradually improved the impregnation processing of the work piece. The internal air chamber is pressurized with compressed gas to penetrate the work piece with extract forcibly.
  
  

• Since the 40’s, impregnation is the result of pressure and vacuum evolution and the development of equipment for impregnating the pores on the work piece.
  
  

• There was extensive use of a systematic process to achieve steady development. In the early 50’s impregnation was enacted according to military specifications, and this set the stage for a better impregnation processing system.
  
  

• Along with the development in the 60's the usage of the extract also created a lot of inconveniences to deal with. The commercialization of the process after greatly improving occurred back in the 70s.
  
  

• There was a major breakthrough in the 80's with extract containing a comprehensive environmental protection.
  
  

• The impregnation process in general deals with iron, copper, zinc, aluminum and its alloy castings or powder metallurgy parts. In recent years this has included many industries such as the aerospace industry and electronics industry.
  
  

• Several other relevant industries have begun using impregnation with advanced technology and new special features.