Tel: 0151 495 1939 widnesgalv@btconnect.com

Galvanising Process

Initial Inspection

  • Work is inspected for suitability.
  • Contaminated surfaces through paint, grease, sand etc. and wrongly positioned or missing holes will be communicated to the customer.

Pickle

  • Once the work has been wired onto jigs, they are transferred to our pickling tanks.
  • These contain hydrochloric acid to remove surface rust and mill scale.


Rinse

  • Jigs are immersed in rinse water to clean off the acid.

Flux

  • The final step before the galvanising bath is flux.
  • Work is placed in the flux tank to clean any remaining oxides to allow the zinc to wet the steel.


Hot Dip Galvanise

  • Work is left to dry in the enclosure around the galvanising bath.
  • Once it is dried sufficiently, it is immersed into the bath of molten zinc at 453°.
  • This is when the reaction between the steel and the zinc takes place.
  • The amount of time steel is left immersed in the bath is dependent on the fabrication and its thickness.


Final Inspection

  • Once the steel-work has cooled sufficiently, it is cut down and packed.
  • It is inspected at this point to ensure that it meets the British Standard of BS EN ISO:1461.
  • Finally, it is weighed and ready for dispatch.
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