Name the metal oxide film which is more protective. Explain.

Name the metal oxide film which is more protective. Explain.
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1 Answer

Answer :

Stable -non – porous oxide film. 

Explanation: Metals like Al forms Al2O3 whose volume is greater than the volume of metal (Al). An extremely tightly adhering, non- porous oxide layers is formed. Due to absence of any pores in the oxide film it forms a barrier for further action and hence the rate of oxidation of metal rapidly decreases. 

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