Nearby steel formwork manufacturers: What is the maintenance cycle for stainless steel formwork?

1、 Basic maintenance cycle division
Maintenance type, operation content, cycle standard, applicable scenarios
Daily maintenance: Rinse surface impurities with clean water, wipe off moisture, and maintain regular construction environment after each use
Quarterly maintenance of neutral cleaning agents for deep cleaning, checking the integrity of welds every 3-6 months in high humidity/coastal areas
Annual maintenance, passivation solution treatment, repair of oxide film, and application of anti rust coating once a year for industrial corrosion/salt spray environment
2、 Special scenario correction factor
Highly corrosive environments (chemical plants, coastlines)
The maintenance frequency needs to be increased by 50%, and quarterly maintenance should be changed to once a month for passivation treatment
The surface coating repair cycle has been shortened to 6 months (usually 1 year)
High frequency usage scenarios (bridge prefabrication yard, prefabricated buildings)
Add ultrasonic cleaning process and perform mandatory maintenance 10 times a week
The cutting surface of the template edge needs to be coated with epoxy resin, and it should be reapplied every 2 turns
3、 Key maintenance technical indicators
Cleaning agent selection
Neutral cleaner with a pH value of 6-8 (strong acid/alkali can damage the oxide film)
Prohibit the use of cleaning agents containing chloride ions (Cl ⁻), as concentrations exceeding 25ppm can induce pitting corrosion
Passivation process parameters
Principle of Standard Values for Parameter Items
Nitric acid concentration of 20% -30% promotes chromium oxide regeneration
Processing temperature 40-60 ℃ 7 Accelerated passivation reaction rate
Soak for 30-60 minutes to ensure even coverage of the oxide film
4、 Typical Maintenance Process Example
Maintenance plan for 304 stainless steel formwork in coastal bridge engineering:
Daily: Rinse salt spray crystals with high-pressure water gun (pressure ≤ 3MPa)
Monthly: Neutral detergent+soft bristled brush to clean weld deposits
Quarterly: 10% citric acid solution to remove calcium deposits, rinse with pure water
Every year: Professional passivation treatment restores Cr ₂ O ∝ oxide layer with a thickness of ≥ 2nm
5、 Cost optimization suggestions
Using composite stainless steel templates (such as 5+1 structure) can reduce maintenance frequency by 40%
For templates with a turnover of more than 50 times, it is recommended to upgrade to 316L material to reduce maintenance costs