Oxygen Absorber by Tianhua Oxygen Absorber by Tianhua

Technical Report · Mining & Precision Equipment

Precision Equipment Anti-Corrosion Solution

A four-component OxyFree® system protecting mining equipment for 2+ years at the CODELCO Chuquicamata copper mine, Chile.

Client: Cerrojo SpAEnd User: CODELCO Chuquicamata copper mine (Chile)Products: 504C Oxygen Absorber + Desiccant + Oxygen Indicator + Aluminum Barrier Film
Precision Equipment Anti-Corrosion Solution

Program Overview

For long-term storage of bearings, motors, and gearbox components at one of the world's largest copper mines — 80–95% RH, acidic atmosphere, and coastal salt spray — Tianhua engineered a complete anti-corrosion system: the 504C oxygen absorber creates the oxygen-free environment, silica gel desiccant keeps it dry, an oxygen indicator makes the protection status visible, and aluminum barrier film seals the package.

Challenge & Protection Requirements

Underground mines and coastal storage combine extreme humidity, acidic atmospheres from sulfide mineral oxidation, high chloride salt spray, and 20 °C+ daily temperature swings. Rolling bearings, motors, and gearbox components must survive 6–36 months of storage without corrosion.

Solution

504C deliberately uses a 7-day slow deoxygenation profile: a faster reaction would generate heat and moisture condensation inside the sealed package. It reduces O2 from 21% to below 0.1% within 7 days and maintains that level for more than 2 years. For applications that need speed, the 504BZ showcase model reaches 0.1% within 12 hours.

Products Used

  • 504C Oxygen Absorber

    Creates the documented slow-deoxygenation environment for long-term industrial storage.

  • Silica Gel Desiccant

    Controls moisture inside the sealed anti-corrosion package.

  • Oxygen Indicator

    Provides visual monitoring of the protected package condition.

  • Aluminum Barrier Film

    Forms the documented external gas barrier and sealed protection envelope.

504C Room Temperature Deoxygenation Test (20–25 °C, 1000 ml air)

0%5%10%15%20%21.00%Day 012.80%Day 16.93%Day 22.13%Day 40.56%Day 60.10%Day 7
Measured O2 concentration in the 504C room-temperature deoxygenation test.
Time (Days)O2 ConcentrationDescription
021.00%Initial state
112.80%40% of oxygen removed within 1 day
26.93%Steady absorption
42.13%Steady absorption
60.56%Approaching target
70.10%Deoxygenation endpoint reached

Additional Validation Data

Corrosion Factors at the Storage Site

FactorTypical ParameterImpact
High Humidity80–95% RHExtremely high humidity in underground mines and coastal areas
Acidic AtmospherepH 3–5Sulfide mineral oxidation produces acidic substances
Salt SprayHigh chloride ion concentrationNorthern Chile coastal mining area
Temperature Variation20 °C+ daily rangeAtacama Desert climate characteristics

Four Core Components

ComponentFunctionSpecificationRole
504C Oxygen AbsorberAbsorb oxygen in package80 ml O2/gCreate oxygen-free environment
Silica Gel DesiccantAbsorb moisture in package100 ml H2O/gMaintain dry environment
Oxygen IndicatorReal-time O2 monitoringColor changeVisual monitoring
Aluminum Barrier FilmBlock external gasesOTR ≈ 0Sealed protection

Model Comparison: 504C and 504BZ

Comparison504C (Recommended)504BZ (Showcase)
Deoxygenation Speed7 days to 0.1%12 hours to 0.1%
Design PhilosophyStable & long-termUltra-fast
Application ScenarioLong-term storageSpecial requirements
Recommended UsePrecision equipment anti-corrosionSpecial applications

Key Advantages

  • All-in-One Protection — Oxygen removal + drying + monitoring + sealing in one system.
  • 2+ Years Protection — Long protection period reduces maintenance costs.
  • Easy Operation — Ready to use; no professional training required.
  • Safe & Eco-friendly — Non-toxic certified; transported as ordinary goods.
  • Visual Monitoring — Real-time status check via the oxygen indicator.
Contact UsRequest a Free Sample

Start a conversation

Get a Free Preservation Consultation