Process of chroming a car bonnet trim (continued)

<< Prev Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 >> Next

  1. Old nickel is removed in a concentrated sulphuric (98%) 12 volt anodic bath for 35 minutes.


  2. The trim is rinsed again



  1. Any rust is now removed in a 38% hydrochloric acid bath for 2 hours.



  1. The trim is then rinsed and the acid neutralised.



  1. The manual polishing stage starts using coarse through to fine linishing belts (60 grit through to 400 grit), with 4 changes of coarseness during this stage.

     Click for WMV video



  1. Polishing compound is applied to the buffing wheel.



  1. Three grades of polishing compound are used during this stage (600, 800 and 1200 grit) to achieve a mirror finish. Total polishing time is 45 minutes.



  1. The trim has conductive copper wires re-attached, and non-conductive weights added.



  1. The first electroplating stage is a pre-soak to remove any remaining polishing compounds in a hot caustic bath (75°C) for 30 minutes.



  1. The trim is then rinsed and scrubbed.




<< Prev Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 >> Next