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Old 02-04-2019, 10:43   #31
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Re: Anchor and rode: How rusty is too rusty?

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I opened up my wallet for 10mm stainless chain. We anchor a lot and sometimes for days at a time. The chain still looks great after years of use and I consider it one of the best equipment purchases I ever made. So how much rust is too much? I would say any.

Here’s a link to some video

https://youtu.be/zlO8vAowYgE
What grade of stainless is that? I've only read about duplex holding up below the water line.
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Old 02-04-2019, 21:26   #32
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Re: Anchor and rode: How rusty is too rusty?

Stainless has many advantages, it does not rust easily, it stacks better in the chain box and it tends to run smoother through the windlass and is stronger.

The reason we do not use stainless is very simply the failure mode. Stainless breaks without a warning. A small manufacturing fault will have big consequences. Also, stainless does not hold up well under water.
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Old 02-04-2019, 22:35   #33
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Re: Anchor and rode: How rusty is too rusty?

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...The reason we do not use stainless is very simply the failure mode. Stainless breaks without a warning. A small manufacturing fault will have big consequences. Also, stainless does not hold up well under water.
This has always been my understanding.
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Old 03-04-2019, 08:43   #34
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Re: Anchor and rode: How rusty is too rusty?

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The reason we do not use stainless is very simply the failure mode. Stainless breaks without a warning. A small manufacturing fault will have big consequences.
Not all stainless is susceptible to stress corrosion cracking, only austenitic.
Duplex, on the other hand, is incredibly corrosion resistant and most grades have a higher yield strength than BBB/30 or grade 40 galvanized anchor chain.

Cost is the major reason why it is not used.
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Old 05-04-2019, 13:57   #35
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Re: Anchor and rode: How rusty is too rusty?

It's too rusty when it breaks loose in heavy weather-- hope this helps.
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Old 29-04-2019, 09:05   #36
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Re: Anchor and rode: How rusty is too rusty?

I took a good look at the chain and anchor - it's actually in perfectly fine shape. There's some rust, but it doesn't seem to have gotten to the point of flaking off and for the price new chain probably makes more sense than regalvanizing 40 feet of older stuff. The last foot or so of chain is a lot more rusty than the remainder, so I may just remove it as suggested.

Thanks for the advice folks. I appreciate the perspective.
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