Tinplate (tin-plated steel) is primarily used in food and beverage packaging, such as cans, milk powder tins, and beverage bottle caps. It is also widely used in industrial containers for chemicals, paints, and aerosols, as well as in hardware and electronic products such as battery casings and electronic components. In addition, it is commonly used in gift boxes, tea tins, toys, and other daily necessities.

The corrosion resistance of hot-dip galvanized pipes mainly depends on the zinc layer thickness and process quality. Internationally accepted grading standards are based on the zinc layer's unit area weight (g/m²) and microstructure:
Level 1 (Standard): Zinc layer thickness 85-120μm (600-900g/m²), using pure zinc coating, suitable for ordinary inland atmospheric environments, with an expected lifespan of 15-20 years.
Level 2 (Reinforced): Zinc layer 120-200μm (900-1500g/m²), with the addition of 0.3%-0.6% aluminum to form a Zn-Al alloy layer, improving weather resistance by 30%, suitable for high-humidity coastal areas.
Level 3 (Heavy-Duty): Zinc layer ≥200μm (above 1500g/m²), using a hot-spray zinc coating + sealed coating composite process, with salt spray resistance exceeding 5000 hours, suitable for C5-level corrosive environments such as chemical plants and offshore platforms.
Level 4 corrosion protection (special grade): Based on Level 3, an epoxy coal tar pitch or PE coating is added to form a dual protection system of "zinc layer + organic coating", and the service life of buried pipelines can reach 50 years.