You have implied a few times that the chain I had was not HDG. I've told you that I bought it from Defender in a sealed barrel from Acco. It may very well not have been HDG, but that would require either Acco selling something under false pretenses, or Defender intercepting the barrel in their warehouse, removing the chain and substituting it with something lesser, and sending it on as being what I paid them for.They thought they had HDG chain and it sucked. But it is highly unlikely that in fact they had HDG chain. Now, I can't say that with absolute certainty as I've never been asked to examine a case of this nature, but until someone can actually supply a correctly done metallurgical report that shows me the contrary, I'm not even remotely convinced. There are far too many other methods used on chain.
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The fundamental problem is that there are many other methods of galvanizing chain that are widely distributed/sold.
Occum's razor suggests neither of those is likely, and the real issue was poor quality HDG.
I can't argue about "proof" because I have none that would be acceptable to you. When one is out cruising in small Caribe countries and their chain is failing, they don't have the time or resources to get a full metallurgical study performed. When 14 other boats in the same anchorage are also experiencing severe chain corrosion within a year, and they too bought the same chain from the same manufacturer from a credible reseller, this isn't a coincidence, nor do I think Acco is cheating people, nor that several resellers are in cahoots to switch out chain to their customers.
As for "blasting a manufacturer" without data to support it, all of the examples I've given have been a specific manufacturer, while I have not had this issue with two different manufacturers (one of them twice). As a consumer, I feel this is enough data.
If you bought two computers several years apart from manufacturer X and their power supplies all failed within a few months, then bought two computers several years apart from manufacturer Y, and another from manufacturer Z, and they all lasted many years without issue, would you feel restrained in writing a review stating that computers from manufacturer X failed, even though you did not do a forensic examination of the reason or cause beyond the power supplies failed? Or feel restrained from discussing it on a computer forum?
Would it change your mind if you met 14 other people with manufacturer X's computers that had also failed within a few months?
Mark