Steel formwork manufacturer: How long is the lifespan of stainless steel formwork?

The lifespan of stainless steel formwork is influenced by multiple factors such as material composition, usage environment, and maintenance measures. The lifespan calculation under comprehensive application scenarios is as follows:
1、 Basic lifespan range
Material type, theoretical lifespan range, key influencing factors, applicable scenarios, and case studies
304 stainless steel with 20-50 year chromium nickel content (Cr ≥ 18%, Ni ≥ 8%) for bridge and coastal engineering templates
201 stainless steel 5-15 years, low nickel content (~4.5%), temporary support, low corrosion environment
Composite stainless steel 25-40 year surface treatment process (galvanizing, coating) high-frequency turnover template
2、 Environmental impact coefficient
Corrosive environment
The lifespan decay rate in coastal areas with high salt spray is as high as 40% -60%
Industrial pollution areas (including sulfides and chlorides) require an additional 0.2mm thickness compensation
Mechanical load
When subjected to a load of 300kN/m ² or more for a long time, the fatigue life is shortened by 30% -50%
3、 Life extension measures
Surface treatment technology
The thickness of hot-dip galvanized layer is ≥ 85 μ m, which can extend the service life by 10-15 years
The electroplating nickel plating process increases the resistance to pitting corrosion and is suitable for acidic environments with a pH value of ≤ 3
Maintenance cycle
Improving the effectiveness of maintaining project operation standards
Surface cleaning: quarterly high-pressure water gun flushing slows down corrosion rate by 30%
Annual passivation solution treatment for oxide film repair restores rust prevention ability by 90%
4、 Economic comparison
Taking the full lifecycle cost of a 10 ton template as an example:
304 stainless steel template: initial cost of 180000 yuan, maintenance fee of about 20000 yuan/year, total cost of 30 years ≈ 780000 yuan
Q235 carbon steel template: The initial cost is 38000 yuan, but it will take 3-5 years to replace. The total cost over 30 years is approximately 500000 yuan (including anti-corrosion treatment)
Note: It is recommended to use 304 stainless steel composite formwork for important projects, taking into account both strength and economy.