The protection of steel by chrome plating is due to

Options

A. Cathodic protection
B. Anodic protection
C. Covering of steel surface
D. Formation of alloy with iron

Answer

To answer the question regarding the protection of steel by chrome plating, we can break down the reasoning step by step:

### Step 1: Understanding Chrome Plating
Chrome plating involves applying a thin layer of chromium to the surface of steel. This layer serves as a protective barrier against environmental factors.

**Hint:** Consider the properties of chromium and how they relate to corrosion resistance.

### Step 2: Corrosion Mechanism
Steel is prone to oxidation (rusting) when exposed to moisture and oxygen. Oxidation occurs at the cathode in an electrochemical cell, leading to the deterioration of the metal.

**Hint:** Recall the electrochemical processes involved in corrosion.

### Step 3: Role of Chrome
The chromium layer acts as a barrier that prevents moisture and oxygen from reaching the steel surface. This significantly reduces the rate of oxidation.

**Hint:** Think about how barriers can prevent reactions from occurring.

### Step 4: Types of Protection
There are two main types of protection against corrosion:
- **Cathodic Protection:** This method involves making the metal a cathode in an electrochemical cell, which can prevent oxidation.
- **Anodic Protection:** This method involves making the metal an anode, which can also prevent corrosion but through different mechanisms.

**Hint:** Differentiate between cathodic and anodic protection based on their definitions.

### Step 5: Conclusion
Since chrome plating effectively prevents oxidation of steel by acting as a protective barrier, it primarily provides **cathodic protection** to the steel surface.

**Final Answer:** The protection of steel by chrome plating is due to **cathodic protection**.