corroded SDRAM contacts - Electronic Circuits Projects Diagrams Free

olcal · 12th April 2003, 04:54 PM

I have a 128 MD SDRAM module (PC133) One of the edge contacts on the module has a bad corrosion on it. Its turned green and rough. The module is still working. I dont want to toss it in the bin. At the same time I do not want to put it into my PC as the corrosion may spread to the memory contact in my PC.
Question: How do I remove the corrosion ? are there any chemical that can be used ? Isopropyl does not work. I tried it.

Chippie · 12th April 2003, 05:18 PM

Clean it with an ink pen rubber......Old computor maintenance trick :lol:

olcal · 12th April 2003, 05:54 PM

I already tried that. Does not work. The surface has turned green and is pitted.

Ricky · 12th April 2003, 06:07 PM

Try using a dab of paint remover or thinner.

bogdanfirst · 13th April 2003, 08:53 AM

the green stuff it is probably copper oxide and it is not that easy to clean and it is toxic too. try, but i dont know if it will work, with cleanink powder and a towl moisted in water, but be careful not to get water all over it. i dont think that it will work but it is very possible.

olcal · 13th April 2003, 08:59 AM

Ok I will try both approaches

bogdanfirst · 13th April 2003, 09:03 AM

just be gentle!

**kinjalgp** · 13th April 2003, 07:33 PM

If that doesn't work try putting some drops of lemon juice mixed with slight detergent washing powder. Let the mixture be in solid form only. Now rub the powder on contacts. I am sure it will remove the green stuff.
We use this method to clean copper utensils when they turn green. Make sure, lemon juice does not fall parts of PCB.

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12th April 2003, 04:54 PM	(permalink)
olcal	corroded SDRAM contacts I have a 128 MD SDRAM module (PC133) One of the edge contacts on the module has a bad corrosion on it. Its turned green and rough. The module is still working. I dont want to toss it in the bin. At the same time I do not want to put it into my PC as the corrosion may spread to the memory contact in my PC. Question: How do I remove the corrosion ? are there any chemical that can be used ? Isopropyl does not work. I tried it.

12th April 2003, 05:18 PM	(permalink)
Chippie	Clean it with an ink pen rubber......Old computor maintenance trick :lol:

12th April 2003, 05:54 PM	(permalink)
olcal	I already tried that. Does not work. The surface has turned green and is pitted.

12th April 2003, 06:07 PM	(permalink)
Ricky	Try using a dab of paint remover or thinner.

13th April 2003, 08:53 AM	(permalink)
bogdanfirst	the green stuff it is probably copper oxide and it is not that easy to clean and it is toxic too. try, but i dont know if it will work, with cleanink powder and a towl moisted in water, but be careful not to get water all over it. i dont think that it will work but it is very possible.

13th April 2003, 08:59 AM	(permalink)
olcal	Ok I will try both approaches

13th April 2003, 09:03 AM	(permalink)
bogdanfirst	just be gentle!

13th April 2003, 07:33 PM	(permalink)
kinjalgp	If that doesn't work try putting some drops of lemon juice mixed with slight detergent washing powder. Let the mixture be in solid form only. Now rub the powder on contacts. I am sure it will remove the green stuff. We use this method to clean copper utensils when they turn green. Make sure, lemon juice does not fall parts of PCB. __________________ "There is no way to peace, peace is the way!"