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Old 29-10-2012, 18:45   #1
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G4 chain galvanization?

I've got 300+ feet of G4 hi tensile chain on board. The galvanization on the chain is quickly flaking off(sure makes a mess on the deck). I'm concerned that the loss of it is going to weaken the chain.
Do I need to be concerned about the loss or just start worrying about it rusting out?
I'm in American Samoa so getting replacement chain isn't that easy.
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Old 30-10-2012, 03:07   #2
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Re: G4 chain galvanization?

Hi,if the gal is flaking off, the strength is still there so I would not worry. You can get chain regalvanized very cheap very good with shaker etc. A good place in Penang Malaysia on mainland actually but only over bridge about 5 Ringit a kilo . Good luck
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Old 30-10-2012, 05:01   #3
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Re: G4 chain galvanization?

Have I not read that regalvanizing reduces the strength of chain by about 10%? Just a thought.
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Old 30-10-2012, 05:19   #4
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Thumbs up Re: G4 chain galvanization?

I read that G4 is not affected do to the lower temp used to melt the zinc but thr cleaning bath may be. I have met many who have had their chain regalvanized with no problem. Multiple regalvanizing I think is a no no though. However I did come across a guy in Thailand who sent his chain for regalvanizing and it came back as a lump of of zinc. It had not gone on a shaker and was jammed together. Six feet at a time of solid chain. They replaced it free of charge. Good luck
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Old 30-10-2012, 06:28   #5
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Re: G4 chain galvanization?

Loss of galvanizing will not result in loss of strength. Over time the rusting will lead to loss of strength as the section of the chain link is reduce. In the short term, 4-12mo, there should be no significant loss of strength.

G4 chain depends on the steel formulation for its extra strength relative to G3/BBB so the heat of regalvanizing will not affect strength unless the zinc bath is serious over-heated. Higher grades of chain are heat treated and will lose strength when regalvanized.
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Old 30-10-2012, 13:36   #6
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Re: G4 chain galvanization?

As we're headed toward Indonesia and Thailand, I'll have it done there. Thanks everyone for the info.
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