Induction Heating Etching

Main Goal:

To remove or modify conductive surface layer created during machining operations for better electrical resistance and electrical strength to applied voltage

Additional Possible Benefits:

  • To prevent rusting
  • To improve glue or coating adhesion


  • Etching is always useful but in majority of applications not required
  • Etching with Nitric or Chloric acids does not provide good results; it can damage material and is not safe
  • Phosphoric acid may be used with success for etching and rust prevention
  • Special iron-phosphoric agent CrysCoat 187, produced by Chemetall Oakite ( provides the bests results according to Fluxtrol Inc. experience
  • Use stainless steel or plastic container for etching solution
  • Always use proper safety precautions – clothing, eye protection – when using chemicals
  • Use a water solution with 10% concentration of CrysCoat 187
  • Immerse Fluxtrol for 15 minutes at a temperature of 150°F
  • After etching remove Fluxtrol material and rinse with clean water to remove all solution and completely dry Fluxtrol
  • Used etching solution should be neutralized and disposed in accordance with local, state and federal guidelines.