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Re: Chain and Anchor

Matt Salatino
 

Keep in mind, galvanized, steel chain is more ductile than stainless (a good thing) and has higher tensile strength. Those are positives. Oh, also costs less.
Negative is, when the galvanizing wears, it begins to rust.

Typically, a 33 kg Rocna will perform better than most 25 kg anchors......

~~~⛵️~~~Matt

On Sep 1, 2019, at 10:20 AM, Herbert Lackner <herbert@...> wrote:

Hi Amelians,

an excellent topic to discuss - anchor and chain :-) 

just booked the flights back to Mexico and "in preparation" for the next season... and therefore questions...

KALI MERA has 90 Meters of 10mm stainless steel chain (316), unfortunately the chain is ~ 13 years old and "end of life" and we have to replace it (galvanic corrosion).

We carry two anchors:
1. Rocna 33 (kg) galvanized main anchor, very satisfied with it. worked perfect in all conditions the last 15.000 miles, maybe a little bit oversized for the Santorin
2. the original Amel stainless steel anchor (25kg) as spare anchor, never used it up to now (I do not know what the manufacturer is, it looks very similar to a Spade, have seen it on many other Amels already, I believe it has been the Amel standard Anchor)

This has been the setup of the boat when we purchased her, and now, as we have to replace the chain, I am thinking what the best option would be

a) I could buy a Wälder stainless steel chain, certified for tropic climate,  made of 1.4462 steel, expensive but very reliable and no problems with galvanic corrosion in warm water
b)  could buy standard galvanized steel chain

We prefer to have the stainless steel chain again because it stays so clean and no problems "in operation"...
argument against stainless steel chain is (beside the price): the Rocna 33 is not stainless, so there might be some "galvanic problems" when connecting the chain to the anchor. To avoid that we could use the Amel factory supplied stainless anchor as a main anchor and use the Rocna as spare, but we do not know if it works as good as the Rocna and it is only 25kg and not 33kg.

So, questions:
* How is the Original stainless Anchor 25 compared to the Rocna 33 ? Any experiences? (we are currently in Mexico and will head to the south pacific in one or two years)
* Is there a problem when connecting the new 1.446 Cromox chain to the galvanized Rocna? Wälder told me that these might cause rust on the chain.

thank you very much for your advise and experiences

fair winds,

herbert
SN120 KALI MERA, Mazatlan

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