Percent Volume Definition. Note that volume percent is relative to volume of solution, not volume of solvent. For example, wine is about 12% v/v ethanol. This means there are 12 ml ethanol for every 100 ml of wine. It is important to realize liquid and gas volumes are not necessarily additive.
However, both the material condition and safety of DoD equipment are routinely being undermined by the effects of corrosion. The dollar cost of corrosion to DoD has been estimated by the Government Accountability Office (GAO) to be $10-20 billion per year.
For instance, in the United States the cost of corrosion has been estimated to be equivalent to 2.5% of the GDP in 1949 (Uhlig method), 4.5% of the GDP in 1975 (input/output method), and 3.1%of the GDP in 1998 (Hoar method).