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This post was last edited by Wang Genrong on 2019-9-1 08:03. Introduction to the corrosion resistance of the enamel coating in enamel-lined reaction vessels. The quality of a high-quality enamel-lined reaction vessel is directly determined by the corrosion resistance of the enamel coating on its inner wall. Below, the author provides users of glass-lined equipment with a brief overview of the corrosion resistance of glass lining glazes against common acid and alkali solutions. Medium 1: Hydrochloric acid: When the medium in the glass-lined reactor is hydrochloric acid at a concentration of 5%, the corrosion rate at 100°C is less than 0.125 mm/year, with no changes to the porcelain surface ； At a concentration of 10% hydrochloric acid, at 100°C, the corrosion rate is less than 0.125 mm/year, with no changes to the porcelain surface ； At a concentration of 20% hydrochloric acid, at 100°C, the corrosion rate is less than 0.125 mm/year, with only a slight loss of luster on the porcelain surface ； At a concentration of 36% hydrochloric acid, at 100°C, the corrosion rate is less than 0.125 mm/year, with only a slight loss of luster on the porcelain surface ； Medium 2: Sulfuric acid: When the medium in the glass-lined reactor is sulfuric acid at a concentration of 20%, the corrosion rate at 100°C is less than 0.125 mm/year, with no changes to the porcelain surface ； At a concentration of 50% sulfuric acid, at 100°C, the corrosion rate is less than 0.125 mm/year, with only a slight loss of luster on the porcelain surface ； Medium 3: Nitric acid: When the medium in the glass-lined reactor is nitric acid, at a concentration of 20%, the corrosion rate at 100°C is less than 0.125 mm/year, with only a slight loss of luster on the porcelain surface ； Medium: 4-bromohydric acid: When the medium in the glass-lined reactor is 4-bromohydric acid at a concentration of 20%, the corrosion rate at 100°C is less than 0.125 mm/year, with only a slight loss of luster on the porcelain surface ； file:///C:\Users\JOHN\AppData\Local\Temp\ksohtml192\wps1.jpghttp://www.jiangsuyangyang.com.cn/ Medium 5: If the medium used in the glass-lined reactor is phosphoric acid, with a concentration of 98%, the corrosion rate at 100°C is greater than 1.25 mm/year; the ceramic surface suffers severe corrosion ； At a concentration of 20% phosphoric acid, at 100°C, the corrosion rate is less than 0.125 mm/year, with only slight loss of luster on the porcelain surface ； file:///C:\Users\JOHN\AppData\Local\Temp\ksohtml192\wps2.jpghttps://shop557671810.taobao.com/shop/view_shop.htm?tracelog=twddp&user_number_id=2279744554&user_id=2279744554 Medium 6: Sodium carbonate – If the medium used in the glass-lined reactor is sodium carbonate, at a concentration of 20%, the corrosion rate at 75°C is 0.125–0.5 mm/year; the ceramic surface loses its luster but can still be used ； Medium 7: Sodium hydroxide: When the medium in the glass-lined reactor is sodium hydroxide, at a concentration of 4%, the corrosion rate at 75°C is greater than 1.25 mm/year; the ceramic surface suffers severe corrosion ； Medium 8: Sodium phosphate – In glass-lined reactors, when the medium is sodium phosphate at a concentration of 20%, the corrosion rate at 100°C is 0.125–0.5 mm/year; the ceramic surface loses its luster but can still be used ；