Chain Galvanizing Question

[Dockhead]

It's time for my anchor chain to be regalvanized, and due to environmental regulations there are fewer and fewer places willing to do it.


I did find a place here in Denmark, but they said something peculiar -- they said they don't recommend regalvanizing chain altogether, because the links stick together afterward, and you have to break them apart, and that leaves holes in the galvanizing for rust to start.


I never heard this before -- is this a problem? Is there some technique to avoid this effect?

[Sardean]

When I had my chain regalvanised they said they "spin it"? and that stops it sticking together. Mine came out better than new. Can't help as to where to get it done as I did mine in Brisbane

[GordMay]

The problem of links welding together is overcome, in part, by centrifuging, or ‘spinning’, to remove excess zinc (as Sardean noted). However, the final zinc thickness* will be less than with a continuous process. Another method is shoogling (a small rocking movement).

You might check out:
B.E. Wedge Ltd
Stafford Street,
Willenhall, West Midlands WV13 1RZ
Tel: 01902 630311
Fax: 01902 366353
Email: wedge@wedge-galv.co.uk


* Excerpted from Practical Sailor’s “Galvanized Coatings Test” (of new chain):
“... Looking at a rough correlation of our coating thickness measurements and abrasion performance, we can conclude that a coating thickness in excess of 100 microns is adequate; anything less, and you can count on a short life before corrosion sets in. If you can find chain with a well-adhered 150-micron coating, then your links are surely well protected. Based on our findings, about twice the coating weight seems to approximate to twice the abrasion resistance. Coatings that are too thick can be brittle and prone to flaking. However, some of the thickest coatings in our test were well adhered...”
➥ https://www.practical-sailor.com/iss...t_11599-1.html

[Rumpi]

Just choose a location you like to sail into.
https://www.zinkpower.com/en/locations.aspx