Basics
The slow degradation of materials by chemical reactions in the environment
What is Corrosion
The paint on a car helps prevent the car from
rusting
When metal is exposed to air it can_______
corrode
In the the Tin-Bismuth Lab combining the metals caused the temperature to _____
lower
What is the most common material to corrode?
metal
Name two ways to slow the corrosion of metals
Protective coating and combining it with another metal that reacts faster
When a metal is exposed to water it can______
corrode
Lowering the melting point of an eutetic alloy makes the metal
more workable example able to soder
Chemical Corrosion can occur faster at ______ temperatures
higher
After a snow storm you should do what to your car to prevent corrosion
wash the car
Is corrosion a physical or chemical change?
chemical
What environments did the cups represent to the hardware
Air (oxidation), Lake/rain water, Increased oxidation (showing rapid corrosion), acidic
When does chemical corrosion stop
When the material is consumed or the liquid is a saturated
Rusting is the _____ of iron and steel
rusting
When metals corrode they form a ____substance
new
Why is the corrosion rate different in each cup?
Metal was exposed to different environments
What Materials can corrode?
metals, polymers and cermics all
What is the protective coat that contains zinc
galanized
What is the galvanic series?
Metals arranged in less reactive (top) to most reactive (bottom)
Why did the hardware that rusted increase in mass
The oxygen attaches to the metal