Galvanizing Process Chart
STEP 1. Receive Customer's Articles, QC Check
Check for quantity, size, free from paint & etc.
STEP 2. Preparation
Articles are tied to jigs
STEP 3. Degreasing
Article's are put degreased with Caustic Soda
STEP 4. Water Rinsing
Rinsing away excess Caustic Soda
STEP 5. Acid Pickling
Scale Removal or Pickling: To remove surface rust and light mill scale using Hydro Chloride Acid.
STEP 6. Water Rinsing
Rinsing to remove excess acid and iron salt.
STEP 7. Pre-Fluxes
Immersion of articles in Hot Flux Solution, Flux Tank (Zinc Ammonium Chloride) to prevent oxidation.
STEP 8. Galvanizing
Chemically clean articles are fully immersed in the galvanizing bath. The galvanizing bath is maintained at a constant temperature (440C-450C).
STEP 9. Quenching
Quenching in cold water / sodium dichromate.
STEP 10. Finishing
Inspection and touching up; removal of sharp edges.