Page 1 of 4 aluminum radiator leak causes alumina, often called "oxy", is a white amorphous powder, commonly known as Alumina white solid insoluble in water. Odorless. Tasteless. Quality extremely hard. Easy to absorb moisture without deliquescence. Amphoteric oxide Matter, soluble Inorganic acids and alkaline solution, almost insoluble in water and non-polar Organic solvents. Relatively Density (d204) 4.0. Melting point is about 2000 ℃. Since corrosion of material different principles, the aluminum radiator corrosion oxidation ability, but prone to alkali corrosion and chloride ion etching, so that when a water heating system alkaline (PH value above 7), or chlorine ion content is high (salt volume), the radiator there is corrosion leakage risk. Also remind consumers: Because aluminum than other commonly used metal active, prone to electrochemical corrosion, you should avoid mixing with other materials, aluminum radiator installation.