Silver plated copper

Many textbooks on electrical engineering have the word "theory" in their title and I consider skin effect to be one.

Silver is the "best" electrical conductor of electricity, marginally better than copper regarding conductivity. Silver will oxidize just as copper will, but silver will not corrode like copper. Unless I could have silver wire throughout my system (including internal wiring of components and speakers) I would not bother with just interconnects or speaker cable in silver.

What is the difference between oxidizing and corroding?

I am no chemical engineer but I think oxidation is primarily a result of being in contact with the atmosphere over an extended time period. Corrosion, to my way of thinking, is the actual destruction of the material due to any number of factors. Consider a penny before 1984 (mostly copper instead of copper plated zinc now). A penny will eventually actually disintegrate if left fo lie outside in the dirt.....it may take years but it will happen. With a silver coin (90% silver, 10% copper) the coin will turn black in color but won't decay as much as purer copper. I believe also that copper loses its conductivity over time whereas I read somewhere that silver will not.

I did not say that a copper cable, or any other, will corrode. My analogy was about a penny left out in the elements, especially if exposed to anything having salt content. An insulated cable in a home environment is not likely to experience oxidation or corrosion unless damaged somehow. The connectors on the end of the cable is where this will happen. My comment about oxidation / corrosion in the post prior to the other one was just about the inherent characteristics of silver vs copper as elements. Sorry for the confusion.

As a long time coin enthusiast, I can say without doubt that copper oxidizes much quicker and to a greater degree than silver. Coin grading services even designate pristine examples of uncirculated pennies as a mint state condition with the additional designation of "RD" which means red. A penny so designated will command a price several times higher than one designated "BN" which means brown. On the other hand, bags of uncirculated silver dollars (90% silver, 10% copper, minted from 1878 to 1934) that have sat in bags of one thousand coins in bank vaults and never seen circulation will still have the original mint luster just like the day they were made, even over a century later. In fact, any oxidation that does occur on those dollars many times results in a multi colored rainbow sort of hue, and those coins command a premium over the mint luster shiny ones. Ironic that oxidation on silver coins commands a premium price while oxidation on copper coins degrades the value.