Zinc Coated Hot Dipped Galvanized Steel Strip/sheet Electro Galvanized Steel Slit Coils Factory

Zinc Coated Hot Dipped Galvanized Steel Strip/sheet Electro Galvanized Steel Slit Coils Factory

Item No.: 00094
Product Name: Electro Galvanized Steel Coil/Sheet/Strip; SECC
Standard: ISI, ASTM, BS, DIN, GB, JIS
Description Specifications Manufacturing Process Products Display Review
Description

Product Name: Electro Galvanized Steel Coil/Sheet/Strip; SECC

Standard: ISI, ASTM, BS, DIN, GB, JIS

Thickness: 0.3 -3.0 mm

Width: 600-1800 mm

Zinc Coating: 20-40g/m2

Surface Treatment: Oiling, chemical passivation, phosphating, fingerprint resistant, self-lubricating fingerprint resistant.

Steel Grade: SECC(common), SECD(stamping), SECE(Deep stamping).

Product Introduction

Electro galvanized steel is a process in which a layer of zinc is bonded to steel in order to protect against corrosion. EGI steel sheet is manufactured by electroplating a pure zinc coating on one or two sides of carbon steel sheet. This continuous electrolytic coating process can be used to apply the coating onto the surface of the steel sheet with an exceptionally uniform thickness.

Main Features

1.Good corrosion resistance, fine and uniform combination, not easy to be corrosive gas or liquid into the interior.

2.Because zinc layer is relatively pure, it is not easy to be corroded in acid or alkali environment. Protect the steel body effectively for a long time.

3.After chromic acid passivation, it can be used in various colors. It can be selected according to customers’ preference. The galvanizing is beautiful and decorative.

4.The zinc coating has good ductility and will not easily fall during various bending, handling and impact.


Specifications
Coil Weight 3-20 ton/coil
Certification ISO, SGS
Monthly production 3000-10000 tons
MOQ(Minimum order quantity) 20 tons
Delivery time Stock: 7 days
Futures: 15-35 days
Packaging Water proof paper is inner packing,galvanized steel or coated steel sheet is outer packing , side guard plate,then wrapped by seven steel belt.or according to customer’s requirement
Port Shanghai
Ningbo
Qingdao
Qinhuangdao
Export market Europe
Africa
Central Asia
Southeast Asia
Middle East
South America
North America, etc
Manufacturing Process

Manufacturing Process

Electrogalvanization is the use of electrolytic equipment to degrease and pickle the workpiece into a solution containing a zinc salt, and connect the negative electrode of the electrolytic equipment; place a zinc plate on the opposite side of the workpiece to connect the positive electrode of the electrolytic equipment, and turn on the power With the directional movement of the current from the positive electrode to the negative electrode, a layer of zinc will be deposited on the workpiece.

Electro-galvanizing Methods

1.Cyanide galvanizing
Because cyanide is highly toxic, environmental protection puts forward strict restrictions on the use of cyanide in electroplating zinc, and continuously promotes the development of reducing and replacing cyanide electroplating baths, requiring the use of low-cyanide (or micro-cyanide) plating baths. But after electroplating with this process, the product quality is good.

2.Zincate galvanizing
This process is evolved from cyanide zinc plating. Zincate zinc plating, which is an alkaline additive, has a pH of 12.5~13. Using this process, the coating lattice structure is columnar, with good corrosion resistance.

3.Chloride galvanizing
This process is widely used in the electroplating industry, and zinc can be substituted for chromium after passivation.

4.Sulfate galvanizing
This process is suitable for continuous galvanizing and has low cost.

The difference between electro galvanizing and hot galvanizing

1.There is a big difference in the amount of galvanizing between hot-dip galvanized sheet and electro-galvanized sheet. The amount of hot-dip galvanized sheet cannot be too small. Generally, the minimum is 50-60g / m2 on both sides, and the maximum is 600g / m2. The galvanized layer of the electro galvanized sheet can be very thin, the minimum is 15g / m2.

2. Hot-dip galvanized sheet and electro-galvanized sheet are fundamentally different in the coating structure. There is a slightly brittle compound layer between the pure zinc coating of the hot-dip galvanized sheet and the steel strip substrate. When the pure zinc coating crystallizes, zinc flowers are mostly formed, and the coating is uniform and free of pores. The zinc atoms of the electro galvanized sheet layer are only deposited on the surface of the steel strip, and they are attached to the surface of the steel strip by physical action.

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