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Ted Mooney, P.E. RET
Pine Beach, NJ

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Specific gravity of anodize solution and how to measure it

2003

Could you please tell me what the specific gravity of the sulfuric acid solution is in a type II anodizing tank?. That is one with a mixture of 165.3 grams of 66 degree baumé sulfuric acid per litre of water. Is a hydrometer an accurate way to measure specific gravity.

Thank you

Kind regards,

Steve Power
Engineer Aircraft - Nelson, Nelson, New Zealand

A hydrometer is not a good way to test your anodizing or hardcoat solutions and most other other plating solutions as contaminates such as aluminum [change the specific gravity].

Chris Snyder
plater - Charlotte, North Carolina
2003

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