Question

Consider the following statements regarding corrosion of ceramic material:

1. Ceramic materials are much better suited to withstand most of these environments for reasonable time periods than are metals.

2. Corrosion of ceramic materials generally involves simple chemical dissolution, in contrast to the electrochemical processes found in metals.

3. Ceramic materials are not frequently used because of their non-resistance to corrosion.

Which of the above statements is/are correct?

1. 1 and 3 only
2. 2 and 3 only
3. 3 only
4. 1 and 2 only
5.

Answer 1

Correct Answer - Option 4 : 1 and 2 only

Statement 3 is wrong because ceramic materials have excellent resistance to corrosin therefore they have wide range of application.

Statement 1 is correct - because almost all Ceramic materials are unreactive and have high resistance to environmental changes.

Statement 2 is correct - since ceramics are poor conductor of heat & electricity therefore are not susceptible to electrochemical corrosion as metals.

Ceromics corrode but not readity, and the corrosion occurs when unstable molecules in the environment react chemically with the molecules making up these non-metal materials.