... density corrosion circumstance,such as inorganic acid,alkali,kinds of salts,etc.The long using temperature is -50ºC--52ºC.Isopthalic ... density corrosion circumstance,such as inorganic acid,alkali,kinds of salts,etc.The long using temperature is -50ºC--90ºC.Einyl ... adverse corrosion circumstance such as acid,alkali,salt,dissolvent or acid & alkali in turn,etc. The long using temperature is -50ºC--100ºC ...