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Why you shouldn't mix Alu+Copper. Another Horror History. - Page 3

post #21 of 51
any feedback from Zalmans support? been loking at that **** thas happened to your block...really poor - thas what'll happen to corsairs H50/70 setup. Its an Alu rad and copper block.
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post #22 of 51
Its called proper coolant.
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post #23 of 51
is all I have to say.
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post #24 of 51
Quote:
Originally Posted by Rangerscott View Post
Its called proper coolant.
what's wrong with distilled water?
post #25 of 51
Zalman recommend that you use their coolant, which contains a corrosion inhibitor. Unfortunately that has it's own problems, not only does it not prevent corrosion in the long term, it also breaks down and gunks things up.

Here is my Zalman ZM-WB5 after only a few months:



And here is a shot of the top of the block after partial cleaning, major corrosion points highlighted in red. Notice how close the one in the square came to the edge of the o-ring... potential leak in the making there.



All I can say is, Zalman, stick to air cooling. You are quite good at that.

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post #26 of 51
This doesn't look like corrosion,this looks like electrolisis.Common problem with today's aluminum auto radiators.Especially if the metal is not grounded.High flow rates and bi-metal designs make it worse.The salts are silicates from the anti-freeze.
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post #27 of 51
Quote:
Originally Posted by Redwoodz View Post
This doesn't look like corrosion,this looks like electrolisis.
It is Galvanic corrosion, kind of a mix between electrolysis and corrosion.
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post #28 of 51
It is definitely galvanic corrosion. When two different metals(types) are used together, one becomes an anode and one becomes a cathode.
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post #29 of 51
distilled water isn't a corrosion inhibitor like ethylene glycol is. . .
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post #30 of 51
Quote:
Originally Posted by GingerJohn View Post
It is Galvanic corrosion, kind of a mix between electrolysis and corrosion.
Quote:
Originally Posted by Sonic-Boom View Post
It is definitely galvanic corrosion. When two different metals(types) are used together, one becomes an anode and one becomes a cathode.
Cant believe i read through the whole thread and this wasnt mentioned till the 3rd page. Are the rest of you guys seriously noobs and dont know you cant mix those two types of metals REGARDLESS of coolant mixture? Why you think they went to AL rads and heater cores in cars? Cause you cant mix a copper rad and AL head...
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