Learn about examples of anti-corrosion measures for steel tanks in the petrochemical industry

Thread Content

Name, Process Conditions, Protection Methods, Service Life: Sulfur acidic water tank (Φ23m×13m): Hydrogen sulfide, ammonia, etc., at 70°C; coated with 7 layers of titanium nanopolymer coating; over 5 years. Hydrochloric acid storage tank (Φ2.7m×11m): 31% synthetic acid, at normal temperature and pressure; lined with 2 layers of rubber; over 8 years. Lined with 2 layers of brick slabs (water glass mortar); 3–5 years. Lined with 3mm fiberglass; over 5 years, in good condition. Mixed acid storage tank (Φ2.7m×11m): 20% nitric acid, 10% hydrofluoric acid, at normal temperature and pressure; lined with butyl nitrile rubber; over 5 years, in good condition. Hydrochloric acid storage tank (Φ2.7m×11m): 31% synthetic acid, at normal temperature and pressure; lined with 1 layer of rubber and 2 layers of brick slabs (phenolic mortar); over 10 years. Nitric acid storage tank (Φ2m×10m): 95% nitric acid, at normal temperature and pressure; lined with 2 layers of brick slabs and water glass mortar; requires maintenance every 2–3 years. Sulfuric acid storage tank (vertical, 200m3): 92.5% sulfuric acid, at normal temperature and pressure; no anti-corrosion treatment; the lid can last over 5 years, while the tank body can last over 10 years. Sulfuric acid horizontal tank (Φ2.7m×11m): 98% sulfuric acid, at 40°C, at normal temperature and pressure; lined with 2 layers of brick slabs and water glass mortar; over 8 years. Benzenesulfonic acid storage tanks (horizontal Φ2.7m×11m and vertical 100m3): 91% benzenesulfonic acid, at normal temperature and pressure; lined with brick slabs and furan mortar; over 8 years. Benzenesulfonic acid storage tank (vertical Φ2m×5m): 90% benzenesulfonic acid, at 90°C, at normal temperature and pressure; made of steel, no anti-corrosion treatment; corrosion depth of 1mm/year. Sodium hydroxide (vertical Φ2.7m×11m): 42% NaOH, at normal temperature and pressure; made of steel, no anti-corrosion treatment; over 10 years. Salt water tank (vertical, 200m3): 40% sodium chloride, pH=6, at 60°C, at normal pressure; lined with 2mm fiberglass; over 8 years. Crude benzene storage tank (horizontal, 30m3): Benzene chloride, hydrogen chloride, at 40°C; lined with 2 layers of brick slabs and water glass mortar; over 5 years