15 - Mangetic and Chemical Properties

0.0(0)
studied byStudied by 0 people
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
Card Sorting

1/7

encourage image

There's no tags or description

Looks like no tags are added yet.

Study Analytics
Name
Mastery
Learn
Test
Matching
Spaced

No study sessions yet.

8 Terms

1
New cards

Magnetic field strength

  • measure of strength of magnetic field in free space

  • independent of a medium

  • units are amperes per meter (A/m)

<ul><li><p>measure of strength of magnetic field in free space</p></li><li><p>independent of a medium</p></li><li><p>units are amperes per meter (A/m)</p></li></ul><p></p>
2
New cards

Magnetic Flux density

  • Included magnetic response of material that field passes through

  • dependent on medium

  • units are teslas (T) or weber/m2

<ul><li><p>Included magnetic response of material that field passes through</p></li><li><p>dependent on medium</p></li><li><p>units are teslas (T) or weber/m<sup>2</sup></p></li></ul><p></p>
3
New cards

permeability, µ

  • units are henrys per meter (H/m)

  • µr is relative permeability

  • µ0 is the permeability of free space =

    4π x 10-7 H/m

4
New cards

corrosion

  • degredation of a material by chemical reactions with its enviorment

5
New cards

galvanic action

  • caused when metallic ions differ in oxidation potenial

  • if metals are similar in oxidation potention corrosion can be slow or negligible

  • if metals are very dissimilar, corrosion is much faster

6
New cards

anode reaction

metal with higher potential acts as anode and will corrode

7
New cards

cathode reaction

metal with lower potential acts as cathode and is unchanged

8
New cards

fretting corrosion

  • when metals rub and slide

  • combination of wear and chemical corrosion

  • happens on metals that depend on film of surface oxide for protection