Projects / Mechanical / Project 48

Corrosion Study with a DIY Salt-Spray Chamber

Approx. component budget: Rs. 6,000 - 10,000

Objective

Compare corrosion on bare, painted, zinc-plated and primer-coated steel plates over several days of salt spray.

What you will build

A closed plastic chamber with a salt-solution reservoir, air pump and spray nozzle, specimen racks, a drain, and coated and uncoated steel plates.

Results you can expect

• Mass loss and rust area vs time for each coating
• Corrosion rate
• Photos at intervals
• Ranking of coating performance

What you will learn

Corrosion mechanisms, protective coatings, accelerated testing, and why products need coating tests.

Tools and notes

Precision balance, camera, Excel. A simplified test, not a certified one. Use gloves and ventilation, and a leak-proof tray under the chamber.

Resume points from this project

• Built and tested Corrosion Study with a DIY Salt-Spray Chamber; objective: compare corrosion on bare, painted, zinc-plated and primer-coated steel plates over several days of salt spray.
• Measured and analysed mass loss and rust area vs time for each coating and corrosion rate; wrote the report and presented the results in a viva. Add your own numbers: [x].

Replace [x] with your own measured results. Write only what you really did.

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