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Massive Oxidation

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At first I thought I had an algae issue as my res appeared to have a lot of black stuff stuck to the sides. I figured it was time to disassemble everything, scrub things down, replace my tubes, and change fluids. Well once I started opening up my water blocks I realized that it wasn't algae, rather it was oxidation on a massive scale. The inside of all my blocks and fittings were completely covered with a black, somewhat powdery substance.

I believe I may have ran into the same issue this guy had: http://www.overclock.net/t/1205823/silver-kill-coil-not-working. My blocks look exactly the same as his and I was running a similar set up; copper CPU block, nickel GPU and mobo blocks, brass radiators, and a silver kill coil w/distilled water.

At first I soaked my copper CPU block in a water/vinegar solution for a couple of hours which cleaned up most of the oxidation after a lot of scrubbing with a toothbrush. I then decided to try an overnight soak with lemon juice which cleaned things up even better although there are still a couple of extremely small black spots in the water channels. Next I soaked my nickel plated mobo blocks in a water/vinegar solution for a couple of hours and scrubbed them. While they look "ok" they still appear a darker than they did brand new. I then did a test soak overnight with one of my nickel barbs with lemon juice, after which had it looking brand new with no scrubbing; a couple of quick passes with a cotton swap confirmed it was clean. This morning I let one of my nickel plated GPU blocks soak in lemon juice for about 2 hours and it pretty much looks brand new with the exception of a few black spots inside the thin "main" water channels. At the moment I have some of my nickel Bitspower fittings soaking in lemon juice in hopes they will turn out as good as the barb did over night.

So here are my questions:
  1. Is it safe to soak the nickel plated blocks with lemon juice for an extended period of time or will that eat away at the plating?
  2. Is it safe to use lemon juice on radiators or should I stick with a mild water/vinegar solution?
  3. How long should I let the radiators sit with the solution of choice?
  4. What can I do, if anything, about build up or deposits in my pump?
  5. Will oxidation continue if using the proper additives?
  6. Will future oxidation be impacted by any remaining oxidation deposits that I may have missed?

Right now I'm most concerned about my pump as I really do not look forward to disassembling it. My next concern are the mobo blocks, even though these are already assembled and back on my motherboard, I may pull them and let them soak in lemon juice. I thought there may have been a very small bit of corrosion on one of the blocks because when I scrubbed a particular spot it appeared like I was brushing rust. After continued scrubbing and going over it with a cotton swab it appeared to be gone. Once I get everything cleaned out and put back together I will be removing the silver kill coil and more than likely replacing pure distilled water with one of Mayhem's dye concentrates.
Fusion Reactor
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel 3930K @ 4.8GHz Asus Rampage IV Extreme 2 X EVGA GTX 670 FTW 32GB Mushkin Redline 2133 
Hard DriveCoolingCoolingCooling
Plextor M3 XSPC Raystorm Koolance Motherboard Blocks 2 X HEATKILLER GTX 680 Hole Edition Water Block... 
CoolingCoolingCoolingMonitor
Swiftech MCP35X2 Water Pump 2 X Alphacool NexXxoS Monsta Quad 120mm Radiators 32 X Gentle Typhoon AP-15 1850 RPM  HP w2408 
Case
Caselabs TH10 
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Fusion Reactor
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel 3930K @ 4.8GHz Asus Rampage IV Extreme 2 X EVGA GTX 670 FTW 32GB Mushkin Redline 2133 
Hard DriveCoolingCoolingCooling
Plextor M3 XSPC Raystorm Koolance Motherboard Blocks 2 X HEATKILLER GTX 680 Hole Edition Water Block... 
CoolingCoolingCoolingMonitor
Swiftech MCP35X2 Water Pump 2 X Alphacool NexXxoS Monsta Quad 120mm Radiators 32 X Gentle Typhoon AP-15 1850 RPM  HP w2408 
Case
Caselabs TH10 
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post #2 of 2
If you soak it in vinegar solution it will clean the oxides rapidly but you need something equally basic to stop the re-occurrence of oxidation once you remove it from vinegar solution. You need to pasivate it using chemical bath.

Untreated copper will always tarnish, there is nothing you can do to stop apart from using ethylene glycol premixes. Mayhems is a good choice, so is EK-Ekoolant. If you want translucent version to mimic the visuals of water - there's that as well.
    
CPUMotherboardGraphicsRAM
Ci7 5930K @ 4.3GHz ASRock X99E-ITX ASUS GTX 980 Ti Strix 16GB DDR4-3200 
Hard DriveHard DriveOptical DriveCooling
2x 256GB SSD RAID0 Adata SP550 960GB (storage) Samsung SE-506 EK-Supremacy MX 
OSMonitorKeyboardPower
Win10 Pro Dell P4317Q Cherry MX-Board 3.0 (MX Blue) EVGA 650W GS 
CaseMouseMouse Pad
In Win D-Frame Mini HP VoodooDNA Roccat Adrenaline 
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CPUMotherboardGraphicsRAM
Ci7 5930K @ 4.3GHz ASRock X99E-ITX ASUS GTX 980 Ti Strix 16GB DDR4-3200 
Hard DriveHard DriveOptical DriveCooling
2x 256GB SSD RAID0 Adata SP550 960GB (storage) Samsung SE-506 EK-Supremacy MX 
OSMonitorKeyboardPower
Win10 Pro Dell P4317Q Cherry MX-Board 3.0 (MX Blue) EVGA 650W GS 
CaseMouseMouse Pad
In Win D-Frame Mini HP VoodooDNA Roccat Adrenaline 
  hide details  
Reply
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