Poorly stripped zinc

The yellow ringed area is where existing zinc has not been completely stripped off the steel surface before the item was hot dipped.  This means the zinc alloy will not grow in that area as there is a barrier over the steel.  The steel in this picture is in the sandelin range and so has developed a thick un-even layer, characteristic of these steels.  The un-stripped area has not developed the thick, uneven layer and so stands out.  This situation will not affect the durability of the item and will protect the steel for many years. It is cause for rejection as it is unsightly and should have been manufactured to a better standard of workmanship.  It is best to contact the galvanizer to discuss what the most practical solution would be.

uneven, thick, patch, uneven, hollow, rough

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