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Concept idea. metal shop custom duplicating the nh-d15s in pure nickle plated copper - Page 3

post #21 of 38
Quote:
Originally Posted by doyll View Post

Really? Please show us some data about nickel plating being only for looks.

Here are some of the reasons I know of for nickel plate something besides decorative; to provide corrosion resistance, wear resistance, or used to build up worn or undersized parts for salvage purposes.

Very well, allow me to be restate in an overly specific manner for any pedantic readers.

Nickel plating on coolers for typical home computer systems is predominantly done for looks, and to a lesser degree done out of sheer ignorance. Looks, in this case, can refer to the prevention of unsightly but otherwise irrelevant oxidation, to changing the color of a functional copper piece from orange to silver, to nonsense (thus cosmetic) marketing claims that replacing an incredibly thin layer of slightly less conductive copper oxide with a significantly thicker layer of similarly less conductive nickel will somehow improve thermal properties, or to equally nonsense (thus still cosmetic) marketing claims that a harder heat transfer surface is somehow an inherently superior at heat transfer (which, in fact, is quite the opposite).
Quote:
Originally Posted by Echoa View Post

But a heatsink isn't just copper or one type of metal unless it's a block. Heat pipes contain a fluid and I do believe that over time as copper corrodes it becomes more porous and pits. Nickel plating would reduce this and help strengthen the material and increase longevity. You could use a nickel plated sink for a long time as long as you have a mount for the socket without any worries

Oxidation only occurs on a tiny surface layer. It has no effect on heat pipes.

While you are correct that the oxidation layer will create microscopic pitting, those pits are far smaller than the machining marks and other imperfections already present on the contact surfaces, which already require a TIM anyway. Perhaps if we could machine surfaces to such exceptionally tiny tolerances that bare metal on metal contacts with no TIM become practical, THEN a corrosion resistant plating would actually have a function.

At any rate my point is that you plate coolers for looks. You can break that down into making it a shiny silver color that blends in with typical components and household items better than orange copper, or preventing unsightly brown/black/green splotches, but either way that is still just appearance.

Switching out the nickel for silver as some people have suggested could improve thermal performance by an extremely negligible amount, but then it would oxidize just like plain copper (which would also perform better than any sort of plating, since the plating process itself is seldom perfect) and defeat the purpose of the plating to begin with.
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post #22 of 38
It's only for looks. No other reason. You can look at every angle and asee @Zero4549 pointed out, every one of them comes back to appearance, nothing more.

Though, I will say that Cooler Master's copper formula seems to turn some TIMs into super glue.....
post #23 of 38
Quote:
Originally Posted by Zero4549 View Post

Oxidation only occurs on a tiny surface layer. It has no effect on heat pipes.

While you are correct that the oxidation layer will create microscopic pitting, those pits are far smaller than the machining marks and other imperfections already present on the contact surfaces, which already require a TIM anyway. Perhaps if we could machine surfaces to such exceptionally tiny tolerances that bare metal on metal contacts with no TIM become practical, THEN a corrosion resistant plating would actually have a function.

At any rate my point is that you plate coolers for looks. You can break that down into making it a shiny silver color that blends in with typical components and household items better than orange copper, or preventing unsightly brown/black/green splotches, but either way that is still just appearance.

Switching out the nickel for silver as some people have suggested could improve thermal performance by an extremely negligible amount, but then it would oxidize just like plain copper (which would also perform better than any sort of plating, since the plating process itself is seldom perfect) and defeat the purpose of the plating to begin with.

So the nickel plating wouldn't help keep the copper from sweating over time and decreasing heat pipes effectiveness? The way in seeing it is beyond cosmetic reasons, while the copper itself would be fine over time thermal conductivity wise, as it ages it would sweat and the vapor in the heart pipes would go away. You add the nickel plating to help with that as well. Would it not also improve structural integrity especially in harsher environments like Salty air?
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post #24 of 38
When it turns green it starts becoming corrosion, not just tarnish.

Unprotected copper corrosion in water block. Shiny penny along side a green corroded and brown tarnished one and real bad copper corrosion.
post #25 of 38
Quote:
Originally Posted by Echoa View Post

So the nickel plating wouldn't help keep the copper from sweating over time and decreasing heat pipes effectiveness? The way in seeing it is beyond cosmetic reasons, while the copper itself would be fine over time thermal conductivity wise, as it ages it would sweat and the vapor in the heart pipes would go away. You add the nickel plating to help with that as well. Would it not also improve structural integrity especially in harsher environments like Salty air?

On the better coolers, the fins are supposed to be soldered onto the heat-pipes. I don't know if that solder is in just one spot or circling the whole hole. If it's everywhere around the hole, this should mean that everywhere the heat-pipe's surface and the fin touch is protected and not exposed to air. The heat-pipe's surface turning ugly wouldn't influence how heat gets distributed through the different parts and into the fins.
post #26 of 38
Quote:
Originally Posted by Echoa View Post

So the nickel plating wouldn't help keep the copper from sweating over time and decreasing heat pipes effectiveness? The way in seeing it is beyond cosmetic reasons, while the copper itself would be fine over time thermal conductivity wise, as it ages it would sweat and the vapor in the heart pipes would go away. You add the nickel plating to help with that as well. Would it not also improve structural integrity especially in harsher environments like Salty air?
The coolant in the heatpipes is chemically neutral, so no corrosion should occur. Generally the heat in system will keep the oxidation to a minimum in the outside environment, but yes, with no plating in humid enviroments copper will corrode.
Tarnish is mild oxidation. rusting away is serious oxidation. wink.gif

The Statue of Liberty is copper and is oxidized to a green color. Generally a light coat of oxidation protects by creating a barrier keeping more oxidation from occurring, but not always.
Edited by doyll - 10/8/16 at 1:58pm
post #27 of 38
Quote:
Originally Posted by doyll View Post

When it turns green it starts becoming corrosion, not just tarnish.

Unprotected copper corrosion in water block. Shiny penny along side a green corroded and brown tarnished one and real bad copper corrosion.

What you see occurring here would occur with a nickel plating as well, and is a result if improper coolant or improperly mixed metals (or in the case of the pennies, contact with any number of substances that acted as catalysts).
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post #28 of 38
Quote:
Originally Posted by Zero4549 View Post

What you see occurring here would occur with a nickel plating as well, and is a result if improper coolant or improperly mixed metals (or in the case of the pennies, contact with any number of substances that acted as catalysts).
Can you supply supporting data?
Granted, nickel can oxidize (tarnish), but not near as easily as copper does.
post #29 of 38
Quote:
Originally Posted by doyll View Post

Can you supply supporting data?
Granted, nickel can oxidize (tarnish), but not near as easily as copper does.

I know at one point ek had issues on waterblocks with the nickel plating not adhering properly and would flake exposing the copper to corrosion (the nickel itself was fine). They would get zinc deposits caught on the block along with bits of silver
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post #30 of 38
Quote:
Originally Posted by doyll View Post

Can you supply supporting data?
Granted, nickel can oxidize (tarnish), but not near as easily as copper does.

What you see is galvanic corrosion. The liquid in the loop acts as an electrolyte, allowing one metal in the loop to sacrifice itself to another. In this case we see corroded copper, and thus we can assume there was also steel, tin, or aluminum in the loop. Copper and nickel have a very similar anodic index, so if one of them is susceptible, so is the other.
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