Question: A tank wall required a 5 mm wall thickness for mechanical considerations. The designer has determined that the corrosion rate will be 0 . 4

A tank wall required a 5 mm wall thickness for mechanical considerations. The designer has determined that the corrosion rate will be 0.4 mm/yr and the expected life of the tank will be 10yr. The total corrosion allowance is the corrosion rate per year (0.4 mm x 10 yr =4 mm).
The corrosion allowance is doubled to 8 mm as a safety consideration.

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