1.How does coating quality affect lifespan?
Hot-dip galvanized steel pipe (coating thickness 85-150μm) has a much longer lifespan than electrogalvanized steel pipe (coating thickness 10-30μm), as the former provides a superior corrosion resistance foundation.
Coating uniformity (no missing plating or pinholes) and adhesion (cross-cut test ≥ Level 3) directly impact corrosion resistance. Poor-quality coatings can cause premature rusting due to localized detachment.
2.How does the usage environment affect the lifespan?
Humidity, pH, salinity (such as coastal areas), and pollutants (such as industrial waste gas) in the environment are the core factors that accelerate corrosion (following the "three elements of corrosion: water + oxygen + electrolyte").
3.How does maintenance affect service life?
Regular cleaning and application of protective paint can significantly extend the lifespan; long-term exposure to harsh environments without maintenance will significantly shorten the lifespan.
4.What are the differences in service life in different scenarios?
Indoor dry environment (such as factory): low humidity, no acid or alkali, few pollutants 10-15 years
Outdoor atmospheric environment (non-coastal): natural wind and rain, a small amount of dust, pH close to neutral 5-10 years
Coastal/high humidity areas: high salinity, high humidity (containing chloride ions), 3-8 years
5.What are your suggestions for extending your lifespan?
For use in locations subject to high corrosion, such as coastal areas or industrial areas, it is recommended to choose thick-coated hot-dip galvanized steel pipe (zinc layer thickness ≥ 100μm) and apply a weather-resistant coating (such as epoxy primer and polyurethane topcoat) after installation.
Regularly inspect the steel pipe surface. If white rust (a corrosion product of the zinc layer) or localized rust is found, promptly clean and reapply anti-rust paint to prevent the rust from spreading to the base material.