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The DX51D+Z zinc free flower galvanized sheet refers to the DX51D+Z Zero Spangle hot-dip galvanized steel sheet/coil, which is a cold-formed hot-dip galvanized steel material that complies with the European standard EN 10346. The surface is specially controlled to give the galvanized layer a zinc free or extremely fine zinc flower appearance, with a smoother and more beautiful surface, suitable for spraying, home appliances, and high-end construction purposes.

The meaning of DX51D+Z

D=Flat steel product for cold forming

X=No specific strength requirement

51=Forming grade

D=Hot dip galvanized

+Z=Zinc coating (pure zinc coating)

What is “Zinc Free Flower” ?

Free Flower “usually refers to Zero Spangle in the galvanizing industry.

Spangle is a pattern formed by zinc crystals during the cooling process of hot-dip galvanizing, while zinc free galvanized sheets have almost no visible crystal patterns on the surface by controlling the composition of the zinc solution and cooling process.

Excellent corrosion resistance

DX51D+Z adopts hot-dip galvanizing process, and the zinc layer forms metallurgical bonding with the steel base, with strong adhesion. The zinc layer serves as a physical barrier to isolate moisture and oxygen, as well as a sacrificial anode that preferentially corrodes in the event of scratches or damage to the coating, protecting the underlying steel. Under the same weight of zinc layer, the corrosion resistance of zinc free galvanized sheet is better than that of zinc coated sheet, because the zinc layer of zinc free galvanized sheet is more uniform and less prone to grain boundary corrosion.

Good formability and processing performance

The low-carbon design and moderate strength range of DX51D+Z give it good plasticity and ductility (elongation ≥ 22%), making it suitable for conventional cold forming processes such as bending, stamping, and flanging.

Excellent welding and coating performance

DX51D+Z can perform common welding operations such as resistance welding and MAG/MIG welding. Attention should be paid to controlling parameters during welding to reduce zinc burning and prevent the formation of pores. The surface treated with passivation after plating is clean and has excellent adhesion to electrophoresis, powder spraying, and color coating. Therefore, DX51D+Z zinc free flower galvanized sheet is very suitable for use as a color coating substrate.

Smooth and aesthetically pleasing surface

The surface of the zinc free flower is smooth and flat, without any zinc flower protrusions, and the visual effect is uniform and consistent. It is suitable for high-end home appliance shells, electronic product panels, and other applications that require high appearance. It is also easy for subsequent powder coating or color coating processing.

Construction industry

Roofing, Wall cladding, Keel and light steel structure

Home appliance industry

Refrigerator backboard, Washing machine casing, air conditioner housing

Automotive industry

Internal structural components, Stamping parts

Color coated substrate (PPGI/PPGL)

Due to its smoother surface, the absence of zinc flowers makes it particularly suitable as a pre coated steel plate substrate.

Companies with high trade rankings in the steel industry.

Customized steel processing one-stop procurement.

Steel exports have exceeded 200 million for five consecutive years.

Customized products can be produced in 5 days.

We have a complete set of testing equipment, such as UV aging chamber, salt spray testing machine, universal testing machine, Rockwell hardness tester, electroplating thickness tester, T-bending testing machine, etc., and have passed IOS, SGS, TUV certification.

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