Rocna anchors use high-tensile steel in the shank, which requires special care during re-galvanizing. It’s important to make sure the cleaning process—specifically the pickling stage—doesn’t damage the steel.
Here’s the recommended procedure:
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Remove all labels and glue residue from the anchor.
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Sandblast the entire anchor down to bare steel, removing all old galvanizing. The surface must be completely clean of zinc before re-coating.
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Notify your galvanizer that the anchor has a high-tensile steel shank.
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They must “flash pickle” the anchor (a quick dip) rather than using an extended soak in the pickling solution, which can damage the steel.
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Hang the anchor tip-down before dipping in zinc.
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Re-galvanize to a zinc coating thickness of 100–200 microns.
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Smooth any sharp edges or spikes with a hand file, taking care not to remove too much zinc or expose bare metal.
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If there are small pinholes in the coating that expose steel, cover them with a cold-galvanizing spray. Your galvanizer can recommend a good product.
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Apply new Rocna Anchor labels. (Contact us if you need replacements.)
Following this process ensures your anchor maintains optimal corrosion resistance and structural integrity.