A tank wall required a 5 mm ...

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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.

 

1 Comment

What you report is a very empirical calculation and not applicable when it concerns the compliance with safety standards.
In fact, the corrosion rate is not linear because it cannot consider the variables that will take place during the lifetime of the structure itself.

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