what is nature of oxide film formed on the aluminium and copper metal due to reaction with atmosphere

Related MCQs

• what is the nature of oxide film, formed on the ferrous metal due to reaction with atmosphere?
•                        is the phenomenon in which a metal or an alloy exibits higher corrosion resistabce than expected from its position in the electrochemical series by forming protective, thin, nonporous oxide film on the surface
• an Aluminium plate of thickness 10 mm is subjected to a force 'F' . If yield strength of aluminium is 150 N/mm2 and width of plate is 60 mm, force F is kN
• an aluminium specimen is subjected to a stress of 160 /mm2 and corressponding modulus of resilience is 0.128 Mpa. Youngs modulus for aluminium is             
• corrosion inhibitors are the chemicals that react with the metal surface, gets absorb and form a thin film on metal . This statement is
• Recrystallization temperature of aluminium is 150˚ C and that of copper is:
• mild steel, gold, silver, copper, aluminium, etc. shows type of fracture
• the corrosion which occurs due to chemical reaction between metal and atmospheric gases is known as               
• a copper of thickness 10 mm is subjected to a lod of 10000 N. if yield strength of copper is 150 then, the width of plate is                
• destruction of metal through unwanted or unintentional chemical or electrochemical reaction is known as