Zirconium sponge ( three: the industrial grade, firearms, external level) product advantages: all zirconia products are suitable for the following medium: any concentration of hydrochloric acid (Fe3+ ), acetic acid, phosphorous acid, phosphoric acid, nitric acid, concentration is less than 20% or more than60% sulfuric acid solution and its corresponding salt solution, various types of concentration of the alkali solution or melt alkali. Nanjing woo metal science and technology limited company