Electro Galvanized Steel

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Electro-galvanized steel

Product Description

Electro-galvanized steel is achieved through precise electro-deposition technology, where a 5-30μm ultra-thin zinc layer is formed on the surface of steel at room temperature. The nano-level surface control (Ra≤0.8μm) perfectly retains the smoothness of the substrate, and it combines both anti-corrosion and decorative functions, providing a "invisible protective shield" for precision components.

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Product Details

Core process

Pre-treatment: Electrolytic degreasing → Ultrasonic cleaning → Micro-etching activation (surface active layer ≤ 10nm)

Electroplating deposition:

- Acidic process: Zinc sulfate system, current density 30A/dm² (high-speed plating)

- Alkaline process: zincate system, current density 10A/dm² (high uniformity)

- Post-treatment: Chrome-free (corrosion resistance 120h) + Sealant (improves resistance to fingerprints)

Product features

Material grade and application

Coating types and surface treatment methods

Available range

Chemical composition

Mechanical property

Product features

Features	Technical advantage	User value
Micron-level precision	The coating thickness tolerance is ±1μm	Meet the protection requirements of micro-sized components such as automotive sensors and micro connectors
Micron-level precision	Customizable single-sided galvanizing (mask accuracy 0.1mm)
Outstanding surface integrity	Surface roughness Ra 0.2-0.8μm (mirror grade)	It can be directly used for visible components of high-end household appliances (such as coffee machine panels), eliminating the polishing process
Outstanding surface integrity	No zinc dross or flow marks defects
Environmental protection and technology	Trivalent chromium passivation has been certified by RoHS/REACH standards.	It meets the environmental protection requirements for electronic products exported to the European Union
Environmental protection and technology	The recovery rate of zinc ions in wastewater is ≥99.8%
Multifunctional surface	It offers multiple surface post-treatments such as conductivity and heat dissipation	Self-lubrication and phosphating enhance the visual premium of surface quality (such as audio enclosures)
Zero thermal deformation	The process temperature is ≤50℃, and the Vickers hardness fluctuation is ≤5 HV	An ideal choice for heat-sensitive components such as precision bearings and chip brackets

Material grade and application

Grade	Material grade	Feature	Application
SECC, BLCE+Z, DC01E+Z	bending and forming grade （general commercial use）	low carbon steel	for general shaping and processing
SECD, BLDE+Z, DC03E+Z	used for drawing	low carbon steel or interstitial free steel	for drawing and shaping process
SECE, BUSDE+Z, DC04E+Z	used for deep drawing	low carbon steel or interstitial free steel	for deep drawing and shaping process
SECF, BUFDE+Z, DC05E+Z	used for special deep drawing	interstitial free steel	for specail deep drawing and shaping process
BSUFDE+Z, DC06E+Z	used for extra deep drawing		for extra deep drawing and shaping process
DC07E+Z	used for special extra-deep drawing		for particularly good deep drawing property

Coating types and surface treatment methods

Classification	Category	Code
Coating type	pure zinc coating	Z
Surface structure	zero spangle	M
Surface treatment	unprocessed	U
	oiling	O
	chrome-free passivation	C5
	chrome-free passivation + oiling	CO5
	single-sided chrome-free passivation + oiling	SCO5
	phosphating	P
	phosphating + oiling	PO
	phosphating (including chrome-free sealing）	PC5
	phosphating (including chrome-free sealing）+ oiling	PCO5
	chrome-free and fingerprint-resistant	N5
	high electrical conductivity, high corrosion resistance, chrome-free and fingerprint-resistant	NE
	excellent electrical conductivity, chrome-free and fingerprint-resistant	NE1
	high corrosion resistance, chromium-free and fingerprint-resistant	NC
	high-temperature resistant, dry, chromium-free and fingerprint-resistant	N8
	high heat dissipation type chromium-free fingerprint resistant	NR
	special chrome-free passivation for fuel tanks	CSG
	organic self-lubrication	SL
	inorganic self-lubrication	SW

Available range

Classification	Status	Nominal dimension
Thickness	cold rolled base metal	0.40～2.00mm
Thickness	hot-rolled pickling base metal	1.50～4.00mm
Width	steel strip, steel coil	800～1830mm
Length	steel plate	1000～6000mm
Inside diameter	steel strip, steel coil	610 or 508mm
Coating(double-sided )	uniform thickness	20～180g/㎡
	different thickness	40～150g/㎡，the maximum difference between the two sides is 40g/㎡
	single side	10～110g/㎡
Delivery time	for stock	10days
Delivery time	for custom	45～60days

Chemical composition

Grade	Chemical composition (heat analysis) % (mass fraction) no more than
Grade	C	Mn	P	S	Tia
SECC, BLCE+Z, DC01E+Z	0.100	0.60	0.045	0.045	—
SECD, BLDE+Z, DC03E+Z	0.080	0.45	0.035	0.035	—
SECE, BUSDE+Z, DC04E+Z	0.010	0.40	0.030	0.030	—
SECF, BUFDE+Z, DC05E+Z	0.008	0.30	0.020	0.020	0.20
BSUFDE+Z, DC06E+Z	0.006	0.30	0.020	0.020	0.20
DC07E+Z	0.006	0.25	0.020	0.020	0.20

Mechanical property

Grade	Tensile test
	Yield strength MPa	Tensile strength MPa	Elongation A80mm% no less than						r90 no less than	n90 no less than
	Yield strength MPa	Tensile strength MPa	＜0.3mm	0.3～＜0.5mm	0.5～＜0.7mm	0.7～＜1.0mm	1.0～＜1.6mm	≥1.6mm
SECC, BLCE+Z, DC01E+Z	140～260	270～410	24	26	28	30	32	34	—	—
SECD, BLDE+Z, DC03E+Z	140～220	270～370	—	30	32	34	35	36	1.3	—
SECE, BUSDE+Z, DC04E+Z	130～200	270～350	—	34	36	38	39	40	1.6	0.18
SECF, BUFDE+Z, DC05E+Z	120～180	270～330	—	35	38	40	40	41	1.9	0.20
BSUFDE+Z, DC06E+Z	110～170	260～330	—	37	39	41	42	43	2.1	0.22
DC07E+Z	100～150	250～310	—	40	42	44			2.5	0.23

Typical applications

Precision electromechanical

Automotive electronics

High-end home appliances

Medical equipment