Cleaning materials for used chips, other tools and help...

[pnunes]

Hello every one here, i am a starter in collection CPUs and have a small collection of 68 !!!
I need some help with some tips of good materials and tools to clean and recover the shape of the used scrap cpus...

Now i use:
- 2 pencil pens 0,5mm and 0,7mm points to strained the bend pins, one by one...
- isopropolic alcohol to clean the gold contact pins.
- sometimes acetone / Paint diluent to remove stickers and thermic paste.
- For ceramic i use Thin Pain Car Polish make great results, but in some gold caps its bad because remove the logos and the rest of the specs...i learn the bad way...

There is any internet guidelines with more help for this?, any tips from the pro collectors here? like to make the gold caps and pins shinning again ??

Thanks and great great forum.... congratulations to everyone with the effort to make this possible.

Pedro

[amstrad84]

Hallo to portugal,
very good cleaning system but for gold capes i am using butter on the finger, no more. Tooth-paste ?? maybe.

[pnunes]

butter ??? fully vegetal ???
For the gold parts, its not easy, maybe a jewelry cleaning solution ?
Best Regards,
Pedro

[CPUShack]

Turpentine works good on stickers, as it wont hurt the print, and it wont hurt shrink wrap on boxed CPUs
For general cleaning i use a acetone/xylene mix

You can use HCl for removing metal scratches on ceramic (be careful)

I use a conditioning glass cleaner (for stoves) for white ceramic)

[wepwawet]

There are rubber pencils available - I use them to clean ceramic.

[pnunes]

[mister_rf]

I will present to your consideration my ceramic chips cleaning experiments.

List of Materials:

-Axion dishwashing paste (a cleaning agent found in most major stores, any brand should work - primary ingredients: calcium carbonate, sodium dodecylbenzenesulfonates, and sodium carbonate)

-Orthophosphoric acid (acid in 20% - 30% solution), also known as "rust remover" or "rust killer". The benefit of orthophosphoric acid is that it's readily available, inexpensive and safer than other types of chemical agents for rust.

-Iron (III) chloride, also called ferric chloride (used to make printed circuit boards)

-Soft cloths

-Water

Wear rubber gloves when working to clean the chips to protect you from chemicals.


Steps to remove the metal scratches:

-Apply a small amount of orthophosphoric acid to the area. Keep it for some time. (half an hour)

-Make a loose paste from the dishwashing paste and water. Apply it directly to the area rubbing gently. The acid and base react during neutralization, forming water and a salt.

-Wipe with a clean cloth dampened with water. Dry with the second cloth.

-Apply a small amount of ferric chloride to the area. Try to avoid marking/printing area. Keep it for one-two hours. Wash it with clean water to remove the ferric chloride.

-Again you need to apply a small amount of orthophosphoric acid to the ceramic surface.

-At the end of the procedure we need to neutralize the acid by adding the dishwashing paste.

Rinse off the paste and dry. Wipe clean.
If the scratch remains, repeat as necessary.
If the scratch is not removed, it may either be too deep or made of a material incompatible with this solution.

Though it may be tempting to keep scrubbing, avoid over scrubbing as this can damage the surface worse and cause a dull spot.

[mister_rf]

Some few examples to compare:

[pnunes]

Amazing results!!!!
Thanks

[Neon]

Thanks for this.

Good results.

[Kev Vader]

Great advice!

[mister_rf]

These are the chemicals I have used to clean the metal scratches.

[pnunes]

Great info ! Great post.
I use a credit card and a pen/pencil 0,5mm and 0,7mm end point to put the pins in order. Sometimes one by one

[snuci]

Is it bad to use one of these to straighten pins? I use it all the time so that even new ICs will fit better in sockets as the legs are usually spread out a little too far.

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