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The picture below shows a stainless-steel milk tank used for storing fresh milk in the milking parlour - NSC Agricultural Technology - Question 2 - 2024 - Paper 1
Question 2
The picture below shows a stainless-steel milk tank used for storing fresh milk in the milking parlour. 2.1.1 Explain why chromium is a suitable alloy for the manuf... show full transcript
Worked Solution & Example Answer:The picture below shows a stainless-steel milk tank used for storing fresh milk in the milking parlour - NSC Agricultural Technology - Question 2 - 2024 - Paper 1
Step 1
Explain why chromium is a suitable alloy for the manufacturing of milk tanks.
Answer
Chromium is a suitable alloy for the manufacturing of milk tanks due to its ability to:
- Increase resistance against corrosion: Chromium enhances the corrosion resistance of steel, preventing degradation from the milking process and storage conditions.
- Promote the hardening of steel: The addition of chromium helps in hardening the steel, making it stronger and more durable.
- Improve the overall strength: This alloy contributes to increasing the tensile and yield strength of the tank, ensuring it can withstand external pressures and impacts.
- Enhance resistance to scale formation: Chromium helps inhibit scale build-up, which is crucial in maintaining hygiene and efficiency in milk storage.
- Improve weldability: Most chromium steels can be welded effectively, allowing for better construction techniques.
Step 2
Which alloy element, other than chromium, can be added to stainless steel to ensure resistance to air, water and many acids and alkali?
Answer
Nickel is an alloy element that can be added to stainless steel to enhance its resistance to air, water, and various acids and alkali. It improves the toughness and corrosion resistance of the stainless steel.