Basic Corrosion Exam Solved Correctly To Score A+

Basic Corrosion Exam Solved Correctly
To Score A+
Process of iron corrosion CORRECT ANSWERS a chemical change and an electrical
process

Chemical Change CORRECT ANSWERS iron into iron oxide

Three ingredients for corrosion battery CORRECT ANSWERS Oxygen, Water, Salt
(Ions)

Ions CORRECT ANSWERS Smog, salt spray, marine locales, industrial soot, splash
and spillage

Anode CORRECT ANSWERS Where rust forms during corrosion battery

Cathode CORRECT ANSWERS where oxygen turns into caustic ion, is not attacked by
rust

Steel corrosion CORRECT ANSWERS edges and other areas of mechanical work
(drilled, sheared, etc.) are prone to anodes.

Acid corrosion battery CORRECT ANSWERS does not form rust on anode, cathode
makes hydrogen ion into hydrogen gas bubbles

Galvanic corrosion CORRECT ANSWERS Two metals connected electrical, one
corrodes faster and preferentially than other

Galvanic Scale CORRECT ANSWERS system of ranking tendency of corrosion, higher
on scale more likely to corrode and protect metal lower on scale

Severe Galvanic Corrosion CORRECT ANSWERS Anode metal area smaller than
cathode metal area, copper plates and steel rivets

Mild Galvanic Corrosion CORRECT ANSWERS Anode metal area larger than cathode
metal area, steel plates and copper rivets

Crevice corrosion CORRECT ANSWERS oxygen starved area becomes anode, outside
area becomes cathode, coating over area not good

Pitting corrosion CORRECT ANSWERS Protective film breaks down, anode formed on
unprotected area, surrounding metal is cathode, smaller the area the worse the rust