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.
The average homeowner usually selects corrosion-resistant metal priced between $700 and $1,000 per square. A natural slate tile roof can cost between $800 and $1,600 per square. But pros say the final tab for a slate roof can exceed $4,000 per square if the slate is high end and the installation pattern is intricate.