Year1
- 规格：
- 齐全
- 厚度：
- 齐全
) Shanghai electro-galvanized steel plate + Baosteel electro-galvanized steel plate
, including the price, model, picture, manufacturer and other information of Shanghai electro-galvanized steel plate + Baosteel electro-galvanized steel plate
. ) Product Specifications
+
) Product Quantity
) Packaging Description
Customer Requirements
) Price Description
Same Day Quotation
)
Concept of galvanized coil
Galvanized coil is a thin steel plate that is immersed in a molten zinc bath so that a layer of zinc adheres to the surface. At present, the continuous galvanizing process is mainly used for production, that is, the rolled steel plate is continuously immersed in a plating bath containing molten zinc to make galvanized steel plate and alloyed galvanized steel plate. This kind of steel plate is also made by the hot dip method, but it is heated to about ℃ immediately after coming out of the tank, so that it can form an alloy film of zinc and iron. This kind of galvanized coil has good paint adhesion and weldability.
Classification and code of galvanized coil
Classification and code of performance level according to regulations
Classification and code of performance
Scope of application of level performance level code
General purpose
The weight code of the mechanically engaged zinc layer shall not exceed
The stamping thickness range is. The weight of the zinc layer shall not exceed
Deep drawing
Special killed steel deep drawing
No aging super deep drawing
Steel plates with structure, , , , , , and thickness are not suitable for , , and Rolled Coils
Hot-rolled Pickled Coils
The classification and code of double-sided equal-thickness galvanized coating types and coating weights are as specified in the table. Upon agreement between the supply and demand parties, steel plates and steel strips with listed coating weights can also be provided
Classification and generation of zinc layer types and coating weights
Galvanized layer zinc-iron alloy plating
Coating weight/(/㎡ )(double-sided) code coating weight/ (/㎡) (double-sided) code
() () () (
() (
() (
() (
() (
() (
() (
( (
( (
( (
Note the weight of the zinc layer in brackets It needs to be agreed upon by both the supplier and the buyer. Different thickness coatings can be represented by half of the coating weight listed in the table to represent different coating weights on the upper and lower surfaces, such as / or /. The surface appearance of the low zinc layer weight may be different from that of the high zinc layer. Weight and surface appearance
The classification and code of the surface structure of the zinc layer are as specified Flat to avoid slip lines. Finished or graded non-aging finish steel plates and steel strips can avoid slip lines within a month
Classification and representation of layer surface structure and smooth surface
Surface structure code
Non-glossy
Normal zinc
Small zinc
No zinc
Zinc-ferro
Surface quality classification and code are in accordance with regulations
Surface quality classification and code
Surface quality representative
Ordinary surface
Higher level surface
Advanced surface
Surface treatment classification and code are in accordance with regulations
Surface Classification and code of treatment
Surface treatment symbol
Passivated
Coated
Painted
Phosphorus
Not treated
. Passivated
Galvanized The passivation treatment of the layer can reduce the occurrence of fold rust (white rust) under humid temperature storage and transportation conditions. However, the anti-corrosion performance of this chemical treatment is limited, and it hinders the adhesion of most coatings. This treatment is generally not used In the zinc-iron alloy coating, except for the smooth surface, as a routine, the manufacturer performs passivation treatment on other types of zinc coating
. Coating
Oiling can reduce the corrosion of steel plates under humid storage and transportation conditions. , coating the passivated steel plates and steel strips with oil will further reduce corrosion under humid storage conditions. The oil layer should be able to be removed with a degreasing agent that does not damage the zinc layer
. Paint
By coating An extremely thin transparent organic coating film that provides an additional protection against corrosion and, in particular, fingerprint resistance. It improves lubricity during molding and serves as an adhesive base for subsequent coatings
. Phosphorus
Through phosphating treatment, galvanized steel sheets with various coating types can be coated without further treatment except normal cleaning. This treatment can improve the adhesion and anti-corrosion properties of the coating and reduce storage and transportation Risk of corrosion during the process. After phosphating, it can be used with suitable lubricants to improve the formability
. Not processed
Steel plates supplied according to this standard can only be used if the orderer makes a request not to handle it and is responsible for it. Only steel strips need not be passivated, oiled, painted, sealed or phosphated.
Edit this paragraph to define the coating of galvanized coils
During the normal solidification process of the normal zinc-sprayed galvanized layer, the zinc grains grow freely to form a coating with obvious spangle morphology
Small zinc During the solidification process of the flower coating, the zinc grains are artificially restricted to form a zinc flower coating as small as possible
Zinc-free plating is obtained by adjusting the chemical composition of the plating solution and does not have a visually visible zinc flower morphology. , a coating with a uniform surface
Zinc-iron alloy plating heat-treats the steel strip after passing through the galvanizing bath, so that the entire coating forms an alloy layer of zinc and iron. This coating has a dark gray appearance and no metallic luster. It is easy to powder during the violent forming process and is suitable for coatings that can be directly painted without further processing except for general cleaning
Differential thickness plating requires coatings with different zinc layer weights on both sides of the galvanized steel sheet
Smooth finishing is a cold rolling process with a slight deformation of galvanized steel sheets for one or more of the following purposes to improve the surface appearance of galvanized steel sheets or to be suitable for decorative coatings to make the finished product invisible. The phenomenon of slip lines (Lüders lines) or creases is temporarily reduced to a minimum.
Galvanized coil defects
Mainly include peeling, scratches, passivation spots, zinc particles, thick edges, air knife streaks, air knife scratches, exposed steel, inclusions, mechanical damage, and steel base properties Defects, wavy edges, curvature, inappropriate size, embossing, inconsistent zinc layer thickness, roller marks, etc.
The main reasons for the zinc layer to fall off are surface oxidation, silicon compounds, too dirty cold-rolled emulsion, and oxidizing atmosphere. And the dew point of the protective gas is too high, the air-fuel ratio is unreasonable, the hydrogen flow rate is low, the furnace has oxygen penetration, the temperature of the strip steel entering the pot is low, the section furnace pressure is low, the furnace door sucks air, the section furnace temperature is low, and the grease cannot evaporate. The aluminum content of the zinc pot is too low, the unit speed is too fast, the reduction is insufficient, the residence time in the zinc liquid is too short, and the coating is too thick
The causes of white rust and black spots are: black spots are formed by further oxidation of white rust The main causes of white rust are: poor passivation, insufficient or uneven passivation film thickness, lack of oil on the surface or residual water on the surface of the strip, surface of the strip during coiling Contains waterbr/> Passivation is not completely bakedbr/> Get wet or exposed to rain during transportation or storagebr/> The finished product has been stored for too longbr/> The galvanized sheet is in contact with or stored together with other corrosive media such as acids and alkalis
/> Finished products are allowed to be stored in the warehouse for a maximum of three months to avoid oxidation caused by prolonged storage.
Product Name Specifications Material Origin Price Quantity Warehouse Resource Number
Hot-dip galvanizing.** + Baosteel Electric Co., Ltd. Baoshan
Hot-dip galvanizing.** + Baosteel Electric Co., Ltd. Baoshan
Hot-dip galvanizing .** + Baosteel Telecom Baoshan
Hot-dip galvanizing.** + Baosteel Telecom Baoshan
Hot-dip galvanizing.** + Baosteel Telecom Baoshan
Hot-dip galvanizing.** + Baosteel Telegraph for Baoshan
Hot-dip galvanizing.** + Baosteel for Baoshan
Hot-dip galvanizing.** + Baosteel for Baoshan
Hot-dip galvanizing.** + Baosteel for Baoshan
Hot-dip galvanizing.* Steel electrical consultation in Baoshan
Hot-dip galvanizing.** + Baosteel electrical consultation in Baoshan
Hot-dip galvanizing.** + Baosteel electrical consultation in Baoshan
WhatsApp
