Tree barking

Tree barking

This commonly referred to as tree barking. The horizontal pipe has a high silicon and phosphorus content and so the zinc alloy grows faster than the other steel around it and does not naturally stop. The coating thickness will be greater than the surrounding steel. High silicon steel can develop brittle coatings and so are less resistant to mechanical damage. Discussions with the galvanizer prior to fabrication about steel composition is the best way to avoid this. This is acceptable and no grounds for rejection.

tree bark, orange peel, rough, slag, pimples

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