A1, according to the thickness classification: (1) thin plate (2) medium plate (3) thick plate (4) extra thick plate
2. Classified according to production methods: (1) hot rolled steel plate (2) cold rolled steel plate
3, according to surface characteristics classification: (1) galvanized sheet (hot-dip galvanized sheet, electro-galvanized sheet) (2) tin plate (3) composite steel plate (4) color coated steel plate

AWelmetal color-coated plate products are mainly made by domestic famous steel mills such as Baosteel, Anshan Iron and Steel, Shougang and Benxi Steel. They adopt the second coating and two baking process to control the precision and uniform color. The products include PE, PVDF, PVC+PET/PET coating series. All substrates are made of home-grade surface galvanized substrate. All products are produced by international famous brand coatings. They are the first choice for household appliances. The products meet the environmental requirements of ROHS, LFGB, REACH, FDA, PAHS, etc., and are widely used in refrigerators and freezers. Washing machine, air conditioner outdoor unit represented by the ice washing appliance industry, kitchen, bathroom and decoration industry represented by microwave oven, water heater, lighting, audio and video industry represented by TV, audio and video; widely used in set-top boxes, DVD, audio, switchgear , microwave oven, electric oven, instrument cabinet shell, TV back panel, refrigerator (freezer) side panel, door panel; washing machine outer panel, enclosure; air conditioner inside and outside enclosure, lighting panel, ballast housing, writing whiteboard; , wallboard, keel board, water heater, purification workshop, industrial plant, sandwich panel, pressure tile, house door, partition, door frame, house light steel knot Member, sliding door, wall, ceiling, bathroom, interior, interior elevator, an elevator lobby, the muffler wall, shutter doors, garage doors and the like.

AWelmetal galvanized sheet products are mainly made by domestic famous steel mills such as Baosteel, Anshan Iron and Steel, Shougang and Benxi Steel. They adopt advanced American-steel joint production technology, complete introduction of German Siemens automatic control system, and quality control of zinc-free galvanized sheet. Management level, fully meet the molding processing requirements of different products; products meet ROHS, LFGB, REACH, FDA, PAHS and other environmental requirements, widely used in refrigerators, freezers, washing machines, air conditioners, outdoor units represented by the ice washing appliance industry, microwave ovens, Water heaters and lightings represent the kitchen and bathroom industry, and the audio-visual industry represented by televisions and audio-visuals. Widely used in ventilation ducts, floor panels, roof structures, balcony panels, balcony railings, roof fans, electric ovens, set-top boxes, computer cases, switch cabinets, instrument cabinets, electric fans, vacuum cleaners, televisions, refrigerators, freezers, washing machines, microwave ovens , air conditioning, etc.

AThe thickness of the galvanized coating determines the corrosion resistance of the plated part. For thin steel sheets with a smooth surface of 3 mm or less, it is difficult to obtain a thick coating in industrial production. In addition, the thickness of the zinc coating which is not commensurate with the thickness of the steel affects the adhesion of the coating to the substrate and the appearance quality of the coating. Excessively thick coatings can cause the coating to be rough and easily peeled off, and the plated parts cannot withstand collisions during handling and installation. If there are more active elements such as silicon and phosphorus in steel, it is very difficult to obtain a thin coating in industrial production. This is because the silicon content in the steel affects the growth mode of the alloy layer between zinc and iron, which will make the ζ phase zinc-iron alloy layer. Rapid growth and pushing the ζ phase to the surface of the coating results in a rough and matte surface, forming a dark coating with poor adhesion.

AThe company has not only passed the ISO9001:2008 international quality system certification, but also has the national CNAS-approved and fully equipped metal material testing center, and has passed the OHSAS18001 occupational health and safety management system, ISO14001 environmental management system and EU ROHS directive, 2009 and 2010. In the year, it won the title of “Guangdong Famous Brand Product”.

AOur company is located in Shenzhen Special Economic Zone, adjacent to Dongguan, Guangzhou, Foshan, Huizhou, Zhongshan, Zhuhai and other cities, with convenient transportation and logistics, and on-site after-sales service guarantee within 48 hours.

AThe company's main home electro-galvanizing and color coating are mainly used in set-top boxes, DVDs, stereos, switch cabinets, microwave ovens, electric ovens, instrument cabinets, TV backplanes, refrigerators (freezers) side panels, door panels; washing machine outer panels, panels; Air conditioner inside and outside casing, lighting panel, ballast casing, writing whiteboard; interior decoration ceiling, wall panel, keel board, water heater, etc.; currently cooperating customers are Omar, Hisense, Midea, Galanz, LG, Osram, Toshiba, TCL And other famous home appliance companies at home and abroad.
The company's building galvanizing and color coating is mainly used in purification workshops, industrial plants, sandwich panels, pressure tiles, house doors, partitions, door frames, light steel structural parts, sliding doors, screens, ceilings, bathrooms, interiors, elevators. Elevator front hall, silencer wall, rolling door, garage door, etc.; customers currently working together include Hongweisheng, Wanxing, Hailong, UGC, Sancha, MEATLINK and other domestic and foreign construction steel and steel structure enterprises.

AIn the production of galvanized sheet, there is a process called passivation. Using zinc on the surface of high-priced chromium oxide galvanized to form a protective film, imitation zinc continues to be oxidized! The ordinary galvanizing process uses high-priced chrome for heavy metals and toxic, while environmentally friendly galvanizing uses low-cost chrome or chrome-free passivation. The production cost is high, and environmental protection is mainly reflected in the passivation process. This production process determines the high cost and common cost of environmentally friendly galvanizing. In normal use and sales process, environmental protection is rarely involved. Only the export and downstream home appliance companies use these factors.

AWelmetal sheet home appliances meet the environmental requirements of ROHS, LFGB, REACH, FDA, PAHS, etc. It is widely used in the ice-washing appliance industry represented by refrigerators, freezers, washing machines, and air conditioners, and is represented by microwave ovens, water heaters, and lighting. The decoration industry, the audiovisual industry represented by televisions and audio and video. a

AShenzhen Welmetal Steel Sheet Co., Ltd was established in 2004 with a registered capital of 100 million yuan and a total investment of 1.2 billion yuan. The company covers an area of 250,000 square meters and currently has acid regeneration line, pickling line, cold rolling line and heat. 10 production lines including dip galvanizing line, color coating line and shear line, with a total production capacity of more than 1.7 million tons. The products are mainly used in home appliances, electronic communication, automobiles, high-end equipment manufacturing, construction and other industries. Galvanized sheet (GI) and home appliance color coated board (PG) are the most complete quality sheet manufacturing and R&D bases in the industrial chain in South China.

AThe properties of steel mainly include mechanical properties, process properties and chemical properties, among which mechanical properties are one of the most important properties.

ACorrosion of steel can be divided into chemical rust and electrochemical rust.
Chemical rust: refers to the rust caused by the chemical reaction of steel directly with the surrounding medium. Most of this rust is oxidation, which causes loose iron oxidation on the surface of the steel.
Electrochemical Corrosion: Corrosion due to the formation of a galvanic cell on the metal surface.