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Cleaning Copper Surface

Cleaning Copper Surface

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Hi, I have a copper plate that we received from supplier ... - Jan 26, 2010 by smt_guy

Interesting selection for a cleaner (floor stripper). I'm cu... - Jan 26, 2010 by isd.jww

what made us to try it? after testing most general degrea... - Jan 26, 2010 by smt_guy

Standard Prep for waxes and oil includes Acetone wash/rinse/... - Jan 26, 2010 by Kraig

You can try a 5% solution of sulfuric acid. It's used to cl... - Jan 26, 2010 by blnorman

how about a light sanding ? ... - Jan 28, 2010 by Phil

We tried light sanding but we still have to find out the pro... - Jan 28, 2010 by smt_guy

can anyone share how copper is being cleaned a a PCB Fab Hou... - Feb 01, 2010 by smt_guy

How about sanding then plating fresh copper? ... - Feb 02, 2010 by Stephen

smt_guy: In removing passivation coats and handling oil, boa... - Feb 02, 2010 by davef

Like Dave said, you need to use an acid solution. This is wh... - Feb 02, 2010 by Flipit

We do this sort of thing for a living, provide cleaning mate... - Feb 06, 2010 by Tom Forsythe

Will this work for Tin Immersion plating or does anyone have... - Apr 15, 2010 by Baildl632

I normally use a particularly aggressive Hand Cleaner for cl... - Apr 15, 2010 by sarason

"BiRAL SC" is a water displacing cleaner. - effective for c... - Apr 15, 2010 by RICH FITZGERALD

Cleaning Copper Surface | 26 January, 2010

Hi,

I have a copper plate that we received from supplier with oils and some sort of stains. We tried most of the general type of degreasers by soaking but didn't work until we tried a Floor Stripper from Ace and it does make the copper clean and shiny and we just use our Aqueous Cleaner to wash and clean them.

I am not happy still with this as I believe that there must be some chemicals out there or solutions for proper application in cleaning copper or removing copper stains.

Please help provide info in case anyone knows anything.

Thanks in advance!

Cleaning Copper Surface | 26 January, 2010

Interesting selection for a cleaner (floor stripper). I'm curious as to what made you try it?

Cleaning Copper Surface | 26 January, 2010

what made us to try it?

after testing most general degreases including some electronic degreasers in spray can from reputable manufacturers without having success in achieving a clean and shiny (no stain) surface. we do not want to re-etch or use etching solution to clean it so that's out from the picture.

anything you can recommend sir isd.jwww ?

cheers!

Cleaning Copper Surface | 26 January, 2010

Standard Prep for waxes and oil includes Acetone wash/rinse/dry.

Cleaning Copper Surface | 26 January, 2010

You can try a 5% solution of sulfuric acid. It's used to clean copper foils to IPC-TM-650 method 2.3.15 prior to testing for purity.

Cleaning Copper Surface | 28 January, 2010

how about a light sanding ?

Cleaning Copper Surface | 28 January, 2010

We tried light sanding but we still have to find out the proper way not to sacrifice the evenness (surface level) of the surface. The flatness of the surface is a requirement.

Cleaning Copper Surface | 1 February, 2010

can anyone share how copper is being cleaned a a PCB Fab House prior to applying HASL?

thanks

Cleaning Copper Surface | 2 February, 2010

How about sanding then plating fresh copper?

Cleaning Copper Surface | 2 February, 2010

smt_guy: In removing passivation coats and handling oil, board fabs do light washes with: * Sulfuric acid * Alkaline * Water ... and then blow dry.

They do not see "oil" like you seem to be talking about. Their "oil" is the assumption that someone in-house has touched the copper and left finger oils on it.

Why haven't you rejected this product?

Cleaning Copper Surface | 2 February, 2010

Like Dave said, you need to use an acid solution. This is what is used prior to HASL. You will think I am crazy but you can use vinegar or even catsup/ketchup. The acetic acid will clean the oxidation. Just rinse the board off before using.

Cleaning Copper Surface | 6 February, 2010

We do this sort of thing for a living, provide cleaning materials to clean things such as copper. If you'd like we can chat off line.

Cleaning Copper Surface | 15 April, 2010

Will this work for Tin Immersion plating or does anyone have suggestions on what will work?

Cleaning Copper Surface | 15 April, 2010

I normally use a particularly aggressive Hand Cleaner for cleaning oil off your hands at garages/ workshops and then Benzotriazole. The Hand cleaner comes from an industrial chemical supplier. It usually contains some NaOH while most Hand-cleaners don't as it is too hard on the skin. An alternative would be a little NaOH dissolved in water. Secondly the Benzotriazole which strips the oxide and leaves the copper shinier for at least one day. An alternative is 4% Acetic acid i.e. that clean vinegar on the bottom of the supermarket shelf but it will quickly re-oxidise the copper, Benzotriazole can be bought from many chemical suppliers McDermid are a big supplier to the PCB industry.

regards Andrew

RICH FITZGERALD

Cleaning Copper Surface | 15 April, 2010

"BiRAL SC" is a water displacing cleaner. - effective for cleaning most metals including carbon- and stainless steel, copper, aluminium etc. - cleans electrical motors, brush holders, bearings, armatures etc, - cleans and treats most types of plastics including polyester, polyethylene and polypropulene - also PTFE-based materials, - removes oil, grease and dirt, evaporates quickly without leaving any oil film, - will not cause corrosion on metals, BIRAL USA=WWW.ADVANTAGELUBES.COM

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