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Questions and Answers
What is rust?
What is rust?
- A green oxide formed by the reaction of iron and oxygen in the presence of water or air moisture
- A blue oxide formed by the reaction of iron and oxygen in the presence of water or air moisture
- A black oxide formed by the reaction of iron and oxygen in the presence of water or air moisture
- An iron oxide formed by the reaction of iron and oxygen in the presence of water or air moisture (correct)
What is the common term for corrosion of elemental iron and its alloys such as steel?
What is the common term for corrosion of elemental iron and its alloys such as steel?
- Rusting (correct)
- Corroding
- Oxidizing
- Degrading
What does rust consist of?
What does rust consist of?
- Hydrous iron(II) oxides and iron(III) oxide-hydroxide
- Anhydrous iron(II) oxides and iron(III) oxide-hydroxide
- Anhydrous iron(III) oxides and iron(III) oxide-hydroxide
- Hydrous iron(III) oxides and iron(III) oxide-hydroxide (correct)
What does surface rust look like?
What does surface rust look like?
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What provides passivational protection to the underlying iron, unlike rust?
What provides passivational protection to the underlying iron, unlike rust?
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Study Notes
Rust
- Rust is a common term for corrosion of elemental iron and its alloys, such as steel.
- Rust consists of iron oxide, an flaky, reddish-brown substance.
Characteristics of Rust
- Surface rust appears as a flaky, reddish-brown substance.
Protection against Corrosion
- Unlike rust, a passive layer provides protection to the underlying iron, preventing corrosion.
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