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Brush Chemical Conversion

Hi,
We have a chemical conversion line in place, but the tanks are small and we were looking to do brush alkaline on larger parts.
I ran some practice parts by brushing on the chemicals and sent them out for salt spray test and they passed.
My question is does anyone have a formal procedure for brush chemical conversion. I have looked but could only find bits and pieces.

Thanks,

Micheline Forth
metal works - Savannah, Georgia, USA
2007

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Chemical Conversion on what: Aluminum, zinc, cadmium or copper? All you have to do is prepare the surface, and keep the chromate wet on the surface until the desired color (coating weight, thickness, etc) is obtained: immersion,spray or swabbing. Higher concentration than normally used in the tank will help speed the process.

Robert H Probert
Robert H Probert Technical Services

Garner, North Carolina

2007

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2007

Hi,
Thanks for your response. It's Aluminum. My point is that the parts are too large for the tanks and I was just looking to see if anyone had a procedure to follow for brush Alodine. The way we ran our practice pieces left a lot to be desired. I have some ideas, but we do work for the aerospace industry and need to make sure that we follow any formal procedures.

Thanks,

Micheline Forth
metal works - Savannah, GA, USA