Hot-Dip Galvanizing Performance in Extreme Temperature
The temperature of the air can have a significant effect on the corrosion rate of some materials, but hot-dip galvanized steel does not show significant differences at very low temperatures, below -40 F, or very high temperatures, above 150 F.
However, very high temperature environments can have an affect on galvanized steel. These effects depend on the time exposed and the severity of the environment. When considering long-term exposure, the recommended maximum service temperature is approximately 390°F (200°C). Problems that could occur from long-term exposure to temperatures above this level include peeling. Peeling is caused by closely spaced voids that expand and form a gap, it causes the outer free zinc layer to split-off from the underlying zinc-iron alloy layers. However, the remaining zinc-iron alloy layers will still provide a high level of corrosion protection for many years.
At temperatures ranging between 390°F (200°C) and 480°F (250°C), the zinc-iron alloy layers will continue to protect the steel from corrosion. High temperatures above 480 F (250°C) will accelerate peeling and continued exposure can result in the zinc-iron alloy layers cracking and separating from the steel. Temperature applications of hot-dip galvanized steel above 480°F (250°C) are not recommended. When considering short-term usage, that is, periods of less than two hours at onetime temperature excursions for less than twenty-four hour, the recommended maximum service temperature for galvanized steel is approximately 660°F (350°C).
Studies done on the effect of low temperature environments on hot-dip galvanized steel indicate minimal change in the behavior of the galvanized coating. Some polar installations have used hot-dip galvanized steel for corrosion protection and have been in service for many years. As with any steel at very low temperatures, the material becomes brittle with extended use. Low temperature climates are an appropriate use for hot-dip galvanized steel.
Related References:
1. About Zinc
2. About Hot-Dip Galvanizing
3. HDG Hot-Dip Galvanizing Last Time
4. Cost of Galvanized Steel
5. Selection of Zinc Coatings
6. Zinc Coatings-Galvanized|Electrogalvanized|Galvanneal|Galfan
7. Physical Properties of HDG Hot-Dip Galvanized
8. HDG Hot-Dip Galvanized Abrasion Resistance Resistance to Mechanical Damage
9. Hot-Dip Galvanized Corrosion Protection and the Zinc Patina
10. HDG Hot-Dip Galvanized High Temperature Exposure
11. HDG Hot-Dip Galvanized Surface Reflectivity
12. HDG Hot Dip Galvanized Coating Structure
13. HDG Hot Dip Galvanized Bond Strength
14. HDG Hot Dip Galvanized Coating Uniformity
15. HDG Hot Dip Galvanized Coating Thickness
16. Powder Coating Hot Dipped Galvanized Steel
17. Painting Hot-Dippped Galvanized Steel
18. Painting Hot-Dipped Galvanized Steel Surface Preparation
19. Surface Coatings for Corrosion
20. Hot-Dip Galvanizing Surface Preparation
21. Hot-Dip Galvanizing Galvanizing
22. Hot-Dip Galvanizing Inspection
23. Characteristics of Zinc
24. Hot-Dip Galvanizing Performance in Atmosphere
25. Hot-Dip Galvanizing in Atmosphere Time to First Maintenance
26. Hot-Dip Galvanizing Performance in Soil
27. Soil Corrosion Data for Corrugated Steel Pipe
28. Hot-Dip Galvanizing Performance in Water
29. Cause of Zinc Corrosion
30. Corrosion of Zinc Coated Steel in Selected Natural Fresh Water
31. Corrosion of Zinc and Zinc Coated Steel in Sea Water
32. Corrosion of Zinc Coating in Industrial and Domestic Water
33. Concrete Corrosion of Hot Dip Galvanizing
34. Concrete corrosion resistance of hot dip galvanized reinforcing
35. Removal of Forms Concrete Corrosion
36. Zinc Reaction in Concrete Corrosion
37. Concrete Corrosion References
38. Hot-Dip Galvanizing Performance in Chemical Solutions
39.Hot-Dip Galvanizing Performance in Contact with Other Metals
40. Hot-Dip Galvanizing Performance in contact with Treated Wood
41. Hot-Dip Galvanizing Performance in contact with Food
42. Hot-Dip Galvanizing Performance in Extreme Temperature
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