A piece of corroded steel plate was found in submerged ocean vessel. It was estimated that the area of plate to be ~38 inch 2, and weight loss due to corrosion was 1.9 Kg. Assuming a corrosion rate of 120 mpy for this steel in seawater, estimate the of submersion time in years for this steel plate?

3.2 years

Explanation:

The corrosion penetration rate (CPR) is given by:

Given that:

CPR = 120 mpy, W = 1.9 kg = 1900 g, density of steel = 7.9 g/cm³, A = 38 in², K = 534 (for 10⁻³ in per year),

Substituting:

The zeroth law of thermodynamics states that if the two thermodynamic systems are in equilibrium with a third system, then they are also in thermal equilibrium with each other.  

Explanation: The third law of thermodynamics is basically used for the measurement of temperature. It states that if the two objects A and B, are in equilibrium with the third object C, then A and B objects are in equilibrium with each other. Basically, it would mean that all three A, B and C are at the same temperature. It is also used to compare the temperature of multiple objects.