Hot-dip galvanized steel coils are widely used in the manufacturing of white appliances (such as refrigerators, washing machines, air conditioners, etc.) due to their excellent corrosion resistance, formability and cost-effectiveness.
Hot dip galvanized steel coils for white goods selection
Coating type:
Pure zinc (GI): Commonly used in home appliances, such as SGCC (Japanese standard), DX51D+Z (European standard).
Zinc-iron alloy (GA): Better weldability, used for parts that need to be welded.
Coating thickness:
Conventional home appliances: 60-120g/m² (double-sided), outdoor units or high-demand parts may be higher.
Substrate material:
Low carbon steel (such as SPCC) balances strength and formability.
Surface treatment:
Passivation (chromate or chromium-free) or oiling to enhance rust prevention and spray adhesion.
How is hot-dip galvanized steel different from other materials?
|
Materials |
Advantages |
Disadvantages |
Applicable scenarios |
|
Hot-dip galvanized steel |
Low cost, corrosion resistance, easy to shape |
Appearance needs to be sprayed for decoration |
Most home appliance housings/structural parts |
|
Stainless steel |
High corrosion resistance, beautiful |
High cost, difficult to process |
High-end home appliances or local parts |
|
Aluminum plate |
Lightweight, corrosion resistance |
Low strength, high price |
Air conditioning radiators, etc. |
|
Color-coated plate |
No spraying, strong decorative effect |
Slightly high cost |
Directly exposed exterior parts |
Typical Applications of Galvanized Steel Coil-Gl in White Appliances
Refrigerator
Outer shell and internal structural parts: galvanized steel coils are used for side panels, back panels, doors, etc. to provide rust protection, especially in humid environments (such as kitchens).
Compressor bracket: Need to withstand vibration and mechanical stress, the galvanized layer can extend the life.
Washing machine
Outer box: prevent corrosion from detergents and water vapor, galvanized sheet (such as DX51D+Z) is often used.
Inner drum support structure: Some models use galvanized steel to enhance durability.
Air conditioner
Outdoor unit shell: Weather resistance is required, galvanized sheet (may be sprayed later) to resist rain and salt spray.
Internal sheet metal parts: such as brackets, chassis, etc.
Microwave oven
Cavity and shell: galvanized sheet is resistant to high temperature and grease corrosion.
