Chlorine and Jewelry Porosity: Causes & Solutions

Question
My wife's wedding ring recently had the center diamond break off, with all the mounts still attached. The jeweler we brought the ring to for repair was able to remount the diamond and create a stronger plate for it to sit on. We were then told the ring was in a severe state of decay due to porosity and that he couldn't guarantee anything on the ring except the new plate. If chlorine was discovered on the ring, then he wouldn't cover anything. My question is does chlorine cause porosity? What I've seen so far says porosity is a problem related to the casting of the ring, not due to environmental issues over 15 years of wear. Her ring is 14K gold. What do you suggest we do?

Answer
Porosity are air bubbles in the casting process which leave tiny holes or larger cavities under the ring, its possible that over the years as the gold wears, more tiny air pockets appear which were under the metal...Chlorine has nothing to do with this, it can only discolor metal and can be polished off. Sounds like a bad casting..take it back to the person who originally made it and have them either cast a new ring or fix the old one.
all the best
LEs