Process of chroming a car bonnet trim (continued)

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  1. The trim is electro-cleaned in a cold cyanide 12 volts anodic solution for 2 minutes and rinsed again.  Click for WMV video



  1. In the acid etching bath (cold 10% sulphuric) for 2 minutes.



  1. The trim is rinsed in the acid rinsing tank.



  1. Next is a cyanide copper plating bath (hot cyanide 45°C) 12 volts cathodic for 5 minutes.  Click for WMV video



  1. Another rinse.



  1. 26. An acid etch (cold 10% sulphuric) for 10 seconds.



  1. Rinse again.



  1. The trim has an acid copper plate (copper sulphate at ambient temperature), 6 volts cathodic for 45 minutes.



  1. Rinse again.



  1. The second polishing stage begins, with the copper plating burnished to a high finish to remove defects using 800 and 1200 grit compounds, taking a total of 15 minutes.

     Click for WMV video




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