Metal Flashcards
Alloy
A sustance composed of two or more metals or of a metal and a n non-metallic constituent.
Annealing
A process in which the metal is reheated and slowly cooled to obtain a more ductile metal, which will have improved its machinability and cold-forming characters.
Anodizing
An electrolytic process that forms a permanent, protective oxide coating on aluminum, with or without added color.
Brass
Alloy of copper and zinc.
Resist corrosion and easily worked.
Bronze
Alloy of copper and tin with small amounts of other metals.
Similar to Brass.
Cast Iron
Iron with high carbon content.
Carbon content: above 2%
Very hard but brittle.
Used in the early 19th century during the Cast Iron Age.
- strong in compression
- weak in tension
Cast Iron Age
A period in the United States from 1850 to the late 1880s where there was a widespread use of cast iron in New York, Chicago, Saint Louis and all over the country.
Casting
Pouring a liquid material or slurry into a mold whose form it will take as it solidifies.
Chicago Construction
Most of the early and innovated cast iron work occured in Chcago, the use of iron skeleton came to be called “Chicago Construction”
Corrosion Scale
Electropositive, Active, Anodic
Likely to corrode
Protective from corrosion
Electronegative, Passive, Cathodic
Electrolysis
A mild electric current is set up between two metals during galvanic action, gradually corroding one while the other remians intact.
Fabrication
The process of forming and shaping refined metal into the desired condition.
- Casting
- Rolling
- Extruding
- Drawing
- Bending
- Brake forming
- Spinning
- Embossing
- Annealing
- Quenching
- Tempering
- Case Hardening
Ferrous Metals
Metals that contain a substantial amount of iron.
All ferrous metails contain a majority of iron, some carbon and other elements in the form of impurities or components mixed with the iron to form an alloy.
The amount of carbon and other elements determines the strength, ductility.
Galvanic Action
The corrosion resulting when dissimilar metals come together in contact with each other in the presence of an electrolyte such as moisture.
