Which statement concerning protecting metals against corrosion is false? a)A met

Question

Which statement concerning protecting metals against corrosion is false?

a)A metal protected by a thin layer of a less easily oxidized metal will corrode even more rapidly if the layer is breached because an adverse electrochemical cell is created.

b)A metal may be directly connected to a "sacrificial anode" (another metal that is more active and therefore preferentially oxidized).

c)Some metals naturally form a protective film on their surface, often the metal oxide.

d)Galvanizing (coating iron with the more active metal, zinc) is only protective as long as the coating layer remains intact.If the zinc coating is broken, there is no more protection.

e) Nonmetal coatings such as paint may be used to prevent contact with oxygen.

Explanation / Answer

Among the given options, option (d) is false.

Beause in galvanization, the inside iron is protected even after the zinc coating is broken. When the zinc coating is broken, the rest of the zinc act as sacrificial anode and protects the iron from oxidation.

Hence in galvanization protection is provided even after the zinc layer is broken.

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.