Surface
Preparation
The Steel product is immersed in a hot alkali solution
which removes organic contaminates such as dirt, paint markings, grease,
and oil from the material surface. The product is then immersed in a
bath of hot sulfuric acid or ambient temperature hydrochloric acid.
This pickling process removes the scale and rust from the materials
surface. The final preparation is done by immersing the steel
product into a bath of ammonium chloride flux. This process removes
oxides from the material and promotes the bonding of zinc to the steel
surface.
Zinc Coating
The steel product is completely immersed in a bath of
pure molten zinc maintained at approximately 850 degrees Fahrenheit.
The zinc metallurgically bonds with the steel providing cathodic corrosion
protection as well as barrier protection. |
