Prepainted Galvanized Steel Coil

Prepainted Galvanized Steel Coil

2025-05-08 10:50:06 1

1. Galvanizing Methods: Hot-Dip vs. Electro-GalvanizingFeatureHot-Dip Galvanizing (HDG)Electro-Galvanizing (EG)ProcessSteel is dipped in molten zinc (~450°C).Zinc is electroplated onto steel via an electrical current.Coating ThicknessThicker (typically 50-150 µm).Thinner (typically 3-15 µm).Durab

: 8618963591776 : reide1925@hotmail.com

leave a message

1. Galvanizing Methods: Hot-Dip vs. Electro-Galvanizing

Feature	Hot-Dip Galvanizing (HDG)	Electro-Galvanizing (EG)
Process	Steel is dipped in molten zinc (~450°C).	Zinc is electroplated onto steel via an electrical current.
Coating Thickness	Thicker (typically 50-150 µm).	Thinner (typically 3-15 µm).
Durability	More robust, suitable for harsh environments.	Less durable, mainly for indoor/mild conditions.
Appearance	Matte gray with spangled finish.	Smooth, shiny, and uniform.
Cost	Higher due to zinc consumption.	Lower, uses less zinc.
Applications	Construction, fencing, pipelines.	Automotive panels, appliances, electronics

A. Building Materials Field

Hot-Dip Galvanizing (HDG) is more common here.

Structural Steel: Beams, columns, and rebars for corrosion resistance.
Roofing & Cladding: Corrugated sheets, gutters, and downspouts.
Fencing & Guardrails: Long-lasting outdoor protection.

Electro-Galvanizing (EG) is used for:

Decorative Finishes (e.g., shiny metal panels).
Lightweight Fixtures (e.g., nails, screws, and mesh).

B. Automotive Manufacturing

Electro-Galvanizing (EG) dominates (for thinner, paintable surfaces):

Car Bodies: Panels, doors, hoods (EG + paint for rust prevention).
Chassis Parts: Some components may use HDG for extra durability.

HDG is used for:

Exhaust systems, bolts, and underbody parts (high corrosion resistance needed).

C. Home Appliance Manufacturing

Mostly Electro-Galvanizing (EG):

Refrigerators, Washing Machines: Inner linings, outer shells (smooth finish).
Air Conditioners & Electronics: Metal casings (lightweight, corrosion-resistant).

HDG is used for:

Support Frames & Outdoor Units (if exposed to moisture).

Product Parameters

Product Name	Prepainted Galvanized Steel Coil
Thickness	0.12mm-3.5mm
Width	600mm-1500mm
Length	508mm/610mm, Support Customization
Standard	AISI, ASTM, DIN, JIS, GB, JIS, SUS, EN, etc.
Zinc Layer	Hot Galvanizing: 60-275g/m²
Zinc Layer	Pre-galvanized: 80-275g/m²

Mechanical Properties

Grade	Yield Strength MPa≥	Tensile Strength MPa≥	Elongation A%≥
DX51D Z/ZM/AZ/AM	240-380	270-500	22
DX52D Z/ZM/AZ/AM	140-300	270-420	26
DX53D Z/ZM/AZ/AM	140-260	270-380	30
DX54D Z/ZM/AZ/AM	120-220	260-350	36
S220GD Z/ZM/AM	220	300	20
S250GD Z/ZM/AZ/AM	250	330	19
S280GD Z/ZM/AM	280	360	18
S300GD A/AM	300	380	18
S320GD Z/ZM/AM	320	390	17
S350GD Z/ZM/AZ/AM	350	420	16
S450GD A/AM	450	480	15
S550GD Z/ZM/AZ/AM	550	550	-

Products Regular Question

Could you provide the samples?

Yes, we could provide the free samples on conditions it is available in stocks, however, the transportation fee is borne by buyer.

How could you guarantee your products?

Each piece of products is manufactured by certified workshops, inspected piece by piece according to national QA/QC standard. We also could issue the warranty to customer to guarantee the quality.