Materials And Electricity

Question 0

Factors in galvanic corrosion

Answer 0

Humidity, anode to cathode surface area ratio, metal types, temperature, salinity

Question 1

Galvanic corrosion

Answer 1

Corrosion that occurs when two metals are in electrical contact with one another

Question 2

Galvanic serries

Answer 2

An ordered list of materials that describe (from noble to active) metals that resist galvanic corrosion

Question 3

Passivicity

Answer 3

The ability of a material to react with the atmosphere to produce a coating that protects it from corrosion
(ie: aluminum oxide)

Question 4

Electrical properties of materials

Answer 4

Dielectric constant, dielectric strength, electrical conductivity, permiability, permativity, piezoelectric constants, seebeck coefficient

Question 5

Dielectric constant (relative permativity)

Answer 5

Value that describes the extent to which the material concentrates electrostatic lines of flux
Ratio of electrical energy stored in the material to the electrical energy stored in a vaccuum

Question 6

Dielectric strength

Answer 6

The maximum electromagnetic field the material can withstand without breaking down

Question 7

Electrical conductivity

Answer 7

How strongly a material resists the flow of electrical current
Given in Ohm-meters

Question 8

Permiability

Answer 8

The ability of a substance to support the formation of an electromagnetic field within itself

Question 9

Permativity

Answer 9

The ability of a substance to resist the formation of an electromagnetic field within itself