Galvanize Steel Sheet and Coil classification and standards
Galvanized Coil,Put stainless sheet in melting Zinc,adhere a layer of Zinc.Currently,the manufacture technique is conti
nuous process.Put stainless sheet in melting Zinc to make galvanized steel sheet;Alloying of galvanized steel.This kind
of steel plate is made by hot dip method, but after the slot, immediately heated to a temperature of about 500 ℃, gener
ate zinc and iron alloy membrane.This kind of galvanized volumes with good coating of the adhersive and weldability.J
awaysteel co.,ltd has been specialized in Galvanized steel sheet and coil, anything need, advise freely.
1.Texture: Steel, zinc alloy;
2.Manufacturing technique: Continuous zinc plating production
3.Performance Advantage:Good in adhensive and weldability.
4.Classification:
4.1 Cyanide Zinc: Plating the use of this technology, the quality of the goods, especially for the color coating, the pigments remain good after p
assivation.
4.2 Zincate Zinc plating: Are attributed to the acidic additives zincate zinc; PH value of 12.5 to 13. With this proces
s, the lattice structure of columnar coating, good corrosion resistance, suitable for Stern, galvanized.
4.3 Zinc Sulfide: This process is observed widely used in electroplating industry, the proportion of up to 40%. Passivated (blue) on behalf of d
ecent zinc chrome (with chrome comparable), especially in water-
soluble enamel paint applied after the plating is very difficult to lay out is the identification of zinc or chrome.
4.4 Zinc Sulphate: This process continues for plating (wire, strip, simple, thick large parts and components), and low cost.
5.Standard:
5.1 Galvanized sheet size: Product standards are set out on the recommended standard galvanized sheet thickness, length and width and tolera
nce. Thickness deviation is generally 0.05mm, length and width deviation generally 5mm, the thickness of the plate between 0.4-
3.2, the product can be found in this standard.
5.2 Apperance:
5.2.1 Surface state: galvanized steel plating process as a different approach, different surface states, such as the common spangle, small spangl
e, flat spangle, spangle-free and phosphate treated surfaces. German standard also provides a surface level.
5.2.2 Galvanized sheet should have good appearance, without the use of harmful product defects, such as non-
plated, hole, rupture, and scum, more than thick plating, scratches, dirt chromate, white rust, etc. Foreign standard requirements for specific cos
metic defects are not very clear. When ordering a number of specific defects shall be specified in the contract.
5.3 The mechanical properties
5.3.1 Tensile test: In general, only the structural, stretching and deep drawing with a tensile galvanized sheet performance requirements. Galvani
zed sheet structure which requires a yield point, tensile strength and elongation, etc.; tensile elongation with the only requirement.
5.3.2 Bending test: Bending test is a measure of process performance of the main project sheet, but national standards for a variety of galvanize
d sheet does not require the same, other than the U.S. standard in addition to structural level, the rest do not require bending and tensile tests. A
nd Japan in addition to structural level, building corrugated board and corrugated board than the rest are general requirements for the bending test.
High-quality, high-grade galvanized plate, particularly in the automotive, appliance use galvanized sheet, requires a very high surface qua
lity, excellent plate, different alloy coating, a good deep drawing properties, high strength. Therefore, the production of
high quality hot dip galvanized sheet production is a systematic project, the smelting, continuous casting, hot-
rolled, cold rolled, galvanized and other production processes have put forward a series of consistent quality system re
quirements, production difficult.
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