What is the corrosion rate of an AST if the original thickness was 0.875" and the current thickness is 0.631" after 14 years?

What is the corrosion rate of an AST if the original thickness was 0.875" and the current thickness is 0.631" after 14 years?

• A. 0.017 inches per year
• B. 0.002 inches per year
• C. 0.170 inches per year
• D. Corrosion rate cannot be calculated

Answer: (A)

To determine the corrosion rate of an Aboveground Storage Tank (AST), you can use the formula: \[ \text{Corrosion Rate} = \frac{\text{Original Thickness} - \text{Current Thickness}}{\text{Time}} \] In this scenario, the original thickness of the tank is 0.875 inches, and the current thickness is 0.631 inches after 14 years. First, you need to find the amount of thickness that has been lost to corrosion: \[ \text{Thickness Loss} = 0.875 \, \text{inches} - 0.631 \, \text{inches} = 0.244 \, \text{inches} \] Next, you can insert the thickness loss into the corrosion rate formula: \[ \text{Corrosion Rate} = \frac{0.244 \, \text{inches}}{14 \, \text{years}} \approx 0.0174 \, \text{inches per year} \] When rounded to three decimal places, this value is approximately 0.017 inches per year. This calculation illustrates the deterioration of the thickness of the tank over time due

To determine the corrosion rate of an Aboveground Storage Tank (AST), you can use the formula:

[

\text{Corrosion Rate} = \frac{\text{Original Thickness} - \text{Current Thickness}}{\text{Time}}

]

In this scenario, the original thickness of the tank is 0.875 inches, and the current thickness is 0.631 inches after 14 years. First, you need to find the amount of thickness that has been lost to corrosion:

[

\text{Thickness Loss} = 0.875 , \text{inches} - 0.631 , \text{inches} = 0.244 , \text{inches}

]

Next, you can insert the thickness loss into the corrosion rate formula:

[

\text{Corrosion Rate} = \frac{0.244 , \text{inches}}{14 , \text{years}} \approx 0.0174 , \text{inches per year}

]

When rounded to three decimal places, this value is approximately 0.017 inches per year.

This calculation illustrates the deterioration of the thickness of the tank over time due