The list below showing 25 active volcanoes in the Philippines was based on the PHIVOLCS list with some included from the GVP. The number is not definite and depends on someone's definition of active or historical timeframe. Descriptions under Eruption were based on the GVP website.
PVD: Process flow diagram. Physical vapor deposition (PVD) describes a variety of vacuum deposition methods which can be used to produce thin films. PVD uses physical process (such as heating or sputtering) to produce a vapor of material, which is then deposited on the object which requires coating.PVD is used in the manufacture of items which require thin films for mechanical, chemical or electronic reasons.nside the Plasma Spray-Physical Vapor Deposition, or PS-PVD, ceramic powder is introduced into the plasma flame, which vaporizes it and then condenses it on the (cooler) workpiece to form the ceramic coating.
Elastomeric roof coating is an acrylic latex spray-on product that has several different uses in roofing systems.It is typically white in color to assist in reducing the heat buildup in roof structures. It can last up to 20 to 50 years if properly applied.sed in polyurethane roofing systems, elastomeric coatings provide the continuous water barrier needed for a successful flat roof. This is a spray foam type roof that will add a thermal barrier to structure as well.