High Quality Hot Dip Galvanized Steel Coating | Anti-Corrosion Steel For Construction Automotive Appliances

Hot Dip Galvanized Steel (commonly referred to as GI) is one of the most widely used anti-corrosion steel materials in the world. Our GI products are manufactured from high-quality cold-rolled low-carbon steel substrate, through fully automatic processes including degreasing, pickling activation, hot-dip galvanizing, passivation and oiling. By immersing the steel strip in molten zinc bath at approximately 460°C, a uniform and dense zinc-iron alloy layer and pure zinc layer are formed on the steel surface. Through the dual protection mechanism of sacrificial anode protection and physical barrier, it effectively isolates water vapor, oxygen and corrosive media from the substrate, significantly extending the service life of steel by 3-5 times.

With smooth surface, uniform spangle, flat shape, excellent formability, weldability and corrosion resistance, our GI products are widely used in construction, automotive, home appliances, furniture and many other fields, making them the preferred anti-corrosion material for industrial manufacturing and engineering construction.

Construction Industry

Roofing panels, wall panels, ceiling panels, rolling shutters

Steel structure workshops, warehouses, enclosure systems

Ventilation ducts, gutters, rainwater channels

Guardrails, fences, window and door frames

Automotive Industry

Body panels, chassis components, reinforcements

Doors, trunks, hood inner panels

Automotive filters, exhaust pipes, cooling systems

Commercial vehicle compartments, frame structures

Home Appliances

Washing machines, refrigerators, air conditioner casings

Water heaters, microwave ovens, oven liners

Appliance back panels, bases, structural brackets

Kitchen equipment, ventilation systems

Other Applications

Office furniture, metal furniture, storage racks

Electrical control cabinets, distribution box enclosures

Agricultural greenhouses, livestock equipment

Solar photovoltaic brackets, pipeline corrosion protection

ISO  Quality Management System Certification

CE Certification EU Construction Products Regulation

SGS Testing Certification Material Performance & Environmental Testing

BV Certification Bureau Veritas Certification

Compliant with ROHS Environmental Standards

Compliant with REACH Regulations

Q1: What is the difference between hot-dip galvanized steel and electro-galvanized steel?

A: Hot-dip galvanized (GI) has thicker zinc coating (30-275g/m²) with excellent corrosion resistance, suitable for outdoor and high-corrosion environments; electro-galvanized (EG) has thinner zinc coating (10-40g/m²) with smoother surface, mainly used for home appliance interiors and mild corrosion environments. Hot-dip galvanized has lower cost and 3-5 times longer corrosion protection life than electro-galvanized.

Q2: How to choose the appropriate zinc coating thickness?

A: General recommendation: Z60-Z90 for indoor dry environments; Z120-Z180 for normal outdoor environments; Z200-Z275 for high-corrosion/coastal areas. Thicker zinc coating provides longer corrosion protection life.

Q3: Can GI steel be painted directly?

A: Yes. We recommend surface preparation first (remove oil, light sanding), use special galvanized paint or epoxy primer for good adhesion. We also provide pre-painted color coated products (PPGI).

Q4: What is white rust and how to prevent it?

A: White rust is zinc oxide corrosion product formed on galvanized layer in humid environments. Prevention measures: 1) Keep dry and ventilated during transportation and storage; 2) Use our passivation + oiling surface treatment; 3) Avoid water ingress when stacked.

Q5: What payment methods and trade terms are supported?

A: We support multiple payment methods including T/T, L/C; trade terms including FOB, CIF, EXW; small trial orders are accepted, mixed container loading is supported.