Corrosion Prevention

Definition - What does Corrosion Prevention mean?

Corrosion prevention refers to the measures that are put in place to prevent the occurrence of corrosion. Prevention measures are designed to protect materials, substrates and metallic structures from the deterioration that results from a substance's chemical or electrochemical interaction with its immediate surroundings. Corrosion prevention refers to the solutions used in industries to prevent the depletion of the physical, mechanical and chemical properties of a material that is normally caused by corrosion. Corrosion prevention is used in industries to maintain the safety, reliability and effectiveness of materials. It also helps in reducing the expensive replacement processes required when corrosion occurs.

Corrosionpedia explains Corrosion Prevention

Corrosion is most commonly experienced in plants, building and construction when materials are exposed to atmospheric conditions. The types of uniform or localized corrosion caused by chemical and electrochemical reactions include:

  • Pitting
  • Galvanic corrosion
  • Crevice corrosion
  • Inter-granular corrosion
  • Concentration cell corrosion
  • Selective leaching
  • Erosion corrosion
  • Stress corrosion
  • Microbiologically induced corrosion

The type of corrosion present is normally indicated by the reduction in material thickness, structure failure, contamination and reduced value of goods, leakages and loss of mechanical strength, and the deterioration of other properties essential to sustain the stability of material structures.

For a new material to survive these types of corrosion, preventive measures have to be put in place. This means that the following preventive measures have to be considered:

  • Determining the galvanic effect of the material by studying its position in the galvanic series
  • Analyzing and identifying the surrounding environmental conditions that accelerate corrosion

From this information, one can condition the material in the following manner to prevent corrosion:

  • Protective Coating: Isolation of the substrate by application of layers: galvanizing, electro-plating, powder coating and painting
  • Metal Alloying: Selection of corrosion resistant materials
  • Use of corrosion inhibitors
  • Electrochemical control measures such as the use of a sacrificial anode

A study of the type of corrosion likely to be experienced in a certain environment is conducted before making a decision on the method to use to avert the occurrence of corrosion.

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