Which of the following statements is false?   a. Stainless steel contains chromium and nickel, which form protective oxide coatings.   b. Galvanized steel is coated with zinc to form an oxide coating.   c. Cathodic protection is a method used to protect steel in buried tanks and pipelines.   d. Chromium and tin are often used to plate steel by forming a durable oxide coating.   e. All of these are true.

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