Inspection of galvanized steel is often fraught with pre-conceived ideas born from paint systems.  Hot dip galvanizing is very different.  Hot dip galvanizing is a long term, hardy coating that has the primary function of protection against corrosion.  There are increasing enquiries related to the aesthetics of galvanizing.  If aesthetics are critical, then there needs to be comprehensive communication with the galvanizer to establish design and steel composition parameters.

See the inspection tool for explanations on various galvanized coating scenarios you may encounter.

INSPECTION TOOL

If you have a project that has been galvanized and you have some questions about the finish, why not try our inspection tool. It is a basic image gallery with some commonly seen situations with galvanizing.

Airlock

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Ash Collection

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Caustic blow out

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Slow drain – frozen zinc

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Mig weld slag

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Spider web pattern

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Oxide lines

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Weld spatter

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Pitted steel surface

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Flame cut surfaces

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Void area from touching plates

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Weep stains

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Frozen Zinc Run

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White Rust

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Delamination

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Extreme overcooking

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Poorly mixed Carbon in Steel

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Overcooking

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Tree barking

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Ash marks

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Chain Mark Repair

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Mechanical Damage

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Uneven growth

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Wash Lines

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Zinc splash

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Pipe lacquer

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Oil based markers

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Sticker marks

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Zinc collection

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Pipe Fish boning

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Quench Mud Stain

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Dull Surface

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Weld Slag

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Solidified zinc runs

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Over blasting

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Advanced White Rust

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Poorly stripped zinc

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Over ground galvanizing

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Dissimilar metal corrosion

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Refurbished steel pitted surfa

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Colour variation

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Stop off paint

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Handling black scuff marks

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