Well ill put my 2cents in on this. Ive been useing Home Depot chain on my boat since i got it. Ive still got the 30' of 3/8 high test chain that i bought when i got the boat. I got the zinc plated stuff, not galvanized since they only have high test in zinc plated. Yes it is rusty now, but its pretty much still there. Ive since retired that chunk and bought some new chain last week when i bought new anchors.
On that note, i will be replacing this chain soon with some better high quality chain since my boat is riding 100% of the time on the anchors. My 2cents worth is if your just using your anchor for weekend trips, go with it, if you boat is on this chain all the time, get good stuff.
This shows how rusty that 2 year old peice of chain is.