Which of the following ion/ions that result in the blue-green color of the active head in a corrosion filament?(a) Ferrous ions(b) Ferric oxide ions(c) Hydrated ferric oxide ions(d) Ferric oxide and hydrated ferric oxide ionsThis question was addressed to me in exam.My doubt stems from Eight Forms topic in portion Eight Forms of Corrosion of Corrosion Engineering

Which of the following ion/ions that result in the blue-green color of

1.	Which of the following ion/ions that result in the blue-green color of the active head in a corrosion filament?(a) Ferrous ions(b) Ferric oxide ions(c) Hydrated ferric oxide ions(d) Ferric oxide and hydrated ferric oxide ionsThis question was addressed to me in exam.My doubt stems from Eight Forms topic in portion Eight Forms of Corrosion of Corrosion Engineering
Answer» Correct CHOICE is (a) FERROUS ions Best explanation: A under film corrosion filament consists of an active head and INACTIVE tail. The active head CONTAINS ferrous ions, that have a characteristic COLOR of blue-green. Whereas inactive tail contains ferric oxide and hydrated ferric oxide ions, that has a characteristic color of red-brown.

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