The alloy ZnAl is composed of 55% aluminum, 43.5 percent zinc, and 1.5 percent silicon. Blue-scope introduced zinccalume steel in 1976, and it swiftly displaced galvanized steel due to its greater corrosion resistance. Zinc-aluminum Tanks have a longer lifespan, require less care, have a higher visual appeal, and are less expensive than traditional tanks (MS, RCC, etc). Our tanks have a corrugated profile for added strength. Please contact us for additional information! 9873505621.