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"Stripping to determine Chromic Acid Anodizing thickness"





January 13, 2010

Is there any method to check chromic acid anodizing thickness by stripping in laboratory? If yes, how can it be done?

Thanks for the help.

Biren Desai
Plating shop employee - Bangalore, India
^


First of two simultaneous responses -- January 14, 2010

chromic-phosphoric acid at 200 F 5 minutes

Terry Tomt
- Auburn, Washington, USA
^


Second of two simultaneous responses -- January 15, 2010

Hi Beren
This can be done by weighing your test panel to decimal places of a gram. then stripping in 20 m/v^2.0% m/v chromic acid, 3.5% v/v phosphoric acid at >97 deg C for 30 mins. Then rinsing and drying the panels before reweighing as before.
divide the change in weight by the surface area in the chosen units.
Hope this helps, good luck

Mark Lees
- Isle of Man, Great Britain
^

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