4 Questions
Define corrosion.
The deterioration of metal, and its properties because of reaction with its environment.
What is another common term for corrosion?
Rust
Which are examples of metal types affected by corrosion? (Select all that apply)
Ferrous
What are the primary phases found in steel? (List all that apply)
Ferrite, Cementite, Pearlite
Study Notes
Chapter Objectives
- Define corrosion
- Explain how and why corrosion occurs
- Describe the economic, environmental, and safety significance of corrosion
Material Degradation
- Corrosion is a form of material degradation
- Other types of material degradation include leaching, decay, and degradation
Definition of Corrosion
- Corrosion is the deterioration of metal and its properties due to reaction with its environment (NACE)
- Corrosion destroys the luster and beauty of objects and shortens their life
Types of Metals
- Ferrous metals:
- Cast Iron
- Steel
- Alloy Steel
- Stainless Steel
- Carbon Steel
- Low Alloy Steel
- Ni-Based Alloy
- High CS
- Med CS
- Low CS
- Non-Ferrous metals:
- Al and alloys
- Zn and alloys
- Cu and alloys
- Mg and alloys
- Ni and alloys
- Inconel
- Incoloy
- Monel
Steel Phases
- Ferrite (α-Fe): soft mechanical properties, low C content
- Cementite (Fe3C): hard mechanical properties, high C content, composition 6.67 wt% C
- Pearlite: alternating layers of ferrite and cementite phases, medium mechanical properties
This quiz covers the basics of corrosion, its definition, causes, and significance in terms of economics, environment, and safety.
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