PROCESS
HOT-DIP
GALVANIZING
HOT-DIP GALVANIZING PROCESS
Why we are
different
001
Racking of the work is the first step in the galvanizing process. This allows the work to be lifted and moved for processing.
Racking
002
A hot caustic bath is used to remove soils, rolling oils, grease and soluble paint. However, it will not remove vinyls, asphalt or welding slag. Mechanical removal of these materials should be done before shipping the work to us.
Degreasing
003
A bath of hot sulfuric acid is used to remove surface rust and mill scale to provide a chemically clean metallic surface
Dilute Acid Cleaning
004
The work is then given a pre-galvanizing inspection.
Pre-Galvanizing Inspection
005
The cleaned work is then slowly lowered through the flux blanket into the bath of 850 degree zinc. The high temperature provides the metallurgical bond.
Flux Blanket
006
The work being withdrawn from the zinc bath.
Galvanizing
007
The work is then cooled in a bath of water and chromate. The chromate provides protection from the formation of wet storage stains. This is a service that few galvanizers provide.
Quenching
008
Time is taken to perform a post galvanizing inspection. Looking specifically for complete coverage.
Post Galvanizing Inspection
009
The post galvanizing inspection also includes a coating thickness test.