This zinc-based phospharizing liquid comes in Formula A (as primary tank liquor), Formula B (as replenishment liquid) and Formula C (as facilitation liquid). Used together with surface conditioning agent, the product is characterized by low cost, fine coating, good anticorrosion performance and strong adhesion to paint. Besides, it makes it easy to stabilize and maintain the tank liquor. The product is among the phosphorizing liquids that have widest and proven applications.