Corrosion in metal conveyor belts is a complex process influenced by multiple factors. Key causes identified through technical analysis include:

1. Chemical Corrosion

Exposure to reactive substances (oxygen, water, acids, alkalis) triggers surface reactions that alter metal structures. Examples:

• Iron oxidation forming rust (Fe₂O₃)

• Copper patina development (Cu₂CO₃(OH)₂) in humid/SO₂-rich environments

2. Electrochemical Corrosion

Galvanic reactions occur when:

• Dissimilar metals contact in electrolyte solutions (e.g., seawater)

• Differential aeration creates anode/cathode zones on same metal
  Accelerating factors: Salt concentration gradients, pH variations

3. Physical Wear-Induced Corrosion

Abrasion mechanisms:

• Protective oxide layers removed by friction

• Exposed fresh metal surfaces react aggressively

• Particulate embedment creates localized corrosion cells

4. High-Temperature Degradation

Thermal effects (>60°C):

• Oxide scale formation accelerates

• Protective coatings decompose

• Grain boundary embrittlement occurs
  Critical threshold: 400°C for carbon steel oxidation

5. Microbial Corrosion (MIC)

Biological agents:

• Sulfate-reducing bacteria produce H₂S

• Acid-producing microbes generate organic acids

• Biofilms create oxygen concentration cells
  Common in: Food processing, marine, wastewater environments

6. Environmental Factors

Stainless steel vulnerability:

• Chloride ions disrupt passivation films

• Acidic/alkaline residues concentrate at stress points

• Solution: Implement CIP (Clean-in-Place) protocols after product contact

7. Material Limitations

Stainless steel performance drivers: