Metal Corrosion

Question 1

when oxygen is added . . .

Answer 1

mass increase, gain of electrons

Question 2

when oxygen is removed . . .

Answer 2

mass decrease, loss of electrons

Question 3

corrosion

Answer 3

metal converts to an oxide via moist air

Question 4

how to prevent corrosion

Answer 4

physical protection via coating of plastic/paint, sacrificial protection via plating with a more reactive metal