Material Guide

Surface Finish Guide for Steel Hardware

Polishing hot dip galvanising zinc plating and anodising compared

Published by Honke (Guangzhou) Hardware Co., Ltd · Longyan City, Fujian Province, China

Finish Is Chosen by Environment Not by Looks

The finish on a piece of rigging hardware is not decoration. It decides how long the part survives where it is installed, and it decides whether the part will stain whatever it is bolted to. Honke offers four finishes across the range and each belongs in a different place.

Polishing on Stainless Steel

Polishing is a mechanical operation. Nothing is added on top of the metal, so there is no coating to chip, flake or peel, and a scratch does not expose a different material underneath. This is the standard finish on the stainless shackle, plate, hook and swivel range and the reason those parts look consistent for years.

Hot Dip Galvanising on Carbon Steel

The part is dipped in molten zinc, which leaves a thick metallurgically bonded layer. It is the longest lasting protection available on carbon steel outdoors. The surface is rough and the coating adds thickness, so threads and close fitting parts need to be planned for it.

Zinc Plating on Carbon Steel

An electroplated layer, much thinner and brighter than hot dip. It suits indoor and dry applications and keeps cost down, but it is not a marine or permanently wet finish.

Anodising on Aluminium

Anodising converts the aluminium surface into a controlled oxide layer and the colour sits inside that layer. That is why an anodised carabiner keeps its colour under abrasion while a painted one does not.

Matching Finishes Inside One Assembly

Where two metals with different finishes sit together in a wet joint, galvanic reaction can start. In permanently wet or salty assemblies, keep the material and finish family the same throughout.

FAQ

Questions on This Guide

Which finish lasts longest outdoors on carbon steel

Hot dip galvanising, by a clear margin over zinc plating.

Does polishing add corrosion protection

Indirectly. A smoother surface holds less dirt and moisture, but the corrosion resistance comes from the stainless steel itself, not the polish.

Next Step

Put This Into a Quotation

Tell us the environment and the load direction and we will point you at the right material grade and body shape.

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