Posted 13 February 2010 - 12:11 PM
Some time back I asked if anyone had knowledge of problems concerning dissimilar metals being in contact with each other in the internal components of a PC that would cause problems IE (electrophoresis). I got some good advice about static discharge - which I took. The problem of electron transfer still bothered me. Yesterday I was cannibalizing a 2006 computer for parts and found evidence of electrophoresis on the motherboard where the screws attach the motherboard to the mounting platform. I had problems with this computer that I could never diagnose. I had finally given up and started using it for parts. I was sure it was a HDD issue but when I pulled it out and tested it it was fine - no viruses, spyware, bad sectors - nothing. The optical drives were the same, no problems. At this point I was POed that I had scrapped a good computer to fix a lesser one. I was pulling cables out when I saw the screws that held the motherboard showed oxidation. There is only one thing I know of that can cause this condition - electrophoresis. On steel this is called rust and is red and easy to see. Oxidation caused by dissimilar metal contact is most often white and can build up under screw heads where it cannot be seen until the damage has been done and it spreads to the outer surfaces. I am not a physicist, so problems arising from differences in electronegativity are beyond my knowledge. To make up for this I have devoloped a high level of suspicion and paranoia. Kind of works - somtimes. Planned obsolescence explains a lot of things and this may be one. I think its a plot to keep us buying more stuff. If it isn't a plot why have I never seen this discussed? It is a real issue, so that leads me to the conclusion that it IS a plot and you are all in on it. Ah HA, I knew it! What do you think?