Technical Notes
The quality of a coating depends on several factors: chemical preparation, raw material quality, surface roughness, zinc temperature, immersion time, extraction and cooling rate, and steel composition.
The duration of a galvanized coating is directly proportional to its thickness. For example, for thicknesses between 70 and 100 microns, obtained in hot dip galvanization, the estimated duration is:
- In rural environments: over 30 years
- In urban environments: more than 20 years
- In marine environments: over 15 years
- In industrial environments: 12 to 15 years
Average value in the set of pieces that constitute the test sample
Material
Thickness micrometers (um)
Mass g/m2
Allowable deviation in the individual pieces that constitute the test sample
Steel thickness: <1mm
50
360
-15%
Steel thickness: >=1mm hasta <3mm
50
400
-15%
Steel thickness: >=3mm hasta <6mm
50
500
-15%
Steel thickness: >=6mm
50
610
-10%
Casting parts
50
500
-10%
