China Changzhou Dingang Metal Material Co.,Ltd. Company News

Dear Customers:   From 14th -28th January, We Will Celebrate The Spring Festival During This Period.   Sorry For Anything Inconvenient To You And Please Feel Free To Contact Us If You Have Some Urgent To Get Answer.   I Would Like To Take This Opportunity To Wish You And Your Families All The Best For A Happy And Healthy Chinese New Year!   Thanks For Your Kind Attention And Support!

Construction and Building roofing material   Typical alloys: A3004, A5052, A5754; Typical width: 575mm, 578mm, 580mm, 595mm, 600mm, 1000mm, can be cut to any width according to the customer requirements; Typical thickness: 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.2mm; Conventional coating: PVDF 2 coated 25-28 microns, 3 coated 35-38 microns, common silver ash, bright silver, champagne silver, pure white, hammer grain embossing, etc.     We’re focus on production color coating aluminum, in our workshop have designed large roller coating machine for aluminum roller coating, the annual deep processing capacity is over 100,000 tons. Our decent color coated aluminum sheets have good quality control in production, One-time can ensure that the front and back two layers of coating forming, more efficient, to avoid the aluminum coil surface paint coating in multiple processing by the transition of baking.With good surface hardness, no cracking , no blistering.   Welcome to consult us, we would like to color your building.

The international airport of Siem Reap Angkor in Cambodia would been soon presented to everyone that's an key cooperation projects between China & Cambodia. At present the roofing system is approaching completion. We are proud of that we supply the coating aluminum material as main part of roofing system. Well.If you need to see more about our metal material product,welcome to contact us directly. Robert @ Changzhou Dingang Metal Material Co.,Ltd www.prepaintedaluminum.com robert@cnchangsong.com whatsapp&wechat: + 86 15961206328 (Phone)  

Galvanized steel is a material formed by combining steel and zinc. Galvanized steel combines the advantages of both materials, resulting in a material with the strength and plasticity of steel and a corrosion-resistant coating that is used in a wide range of industrial applications, including construction, home appliances and automobiles. In this issue, we will first introduce hot-dip galvanized products.     Protective effect of strip galvanization and galvanizing method   Mechanism of zinc plating to protect steel plates   In the atmosphere, zinc is much more resistant to corrosion than steel, and under normal conditions zinc is several times more resistant to corrosion than steel.   1), physical effect.   Zinc plating on the surface of the steel plate, blocking the contact between the steel plate and the corrosive medium outside, so that the steel plate is exempt from the corrosive effect of the corrosive medium.   2) Electro chemical effect.   When galvanized steel substrate and zinc plating exposed to corrosive media environment (such as galvanized scratches and cuts), due to the electrode potential of zinc (-0.726V) is lower than the electrode potential of iron (-0.44V), zinc is anodic and steel is cathodic, so the zinc priority corrosion and protection of the substrate, which is called the sacrificial anode protection of zinc.   The main processes for galvanizing strip steel   Hot-dip galvanizing and electroplating are the two main processes for galvanizing steel sheets, and today we will mainly talk about hot-dip galvanizing.   Hot-dip galvanizing: The difference between the melting points of steel and zinc is large. The melting point of pure iron is 1534°C, while that of zinc is only 419°C. The method of dipping the treated strip steel directly into the molten zinc solution for galvanizing is called hot-dip galvanizing.   Continuous hot-dip galvanizing of strip steel: The production process of joining the steel coils, after the necessary pre-treatment and annealing, the strip steel is directly galvanized through a zinc pot with molten zinc solution is called continuous hot-dip galvanizing of strip steel.   Product classification and features Classification: According to the type of plating, it is divided into GI (pure zinc plating), GA (zinc-iron alloy plating), 55% Al-Zn (aluminum-zinc plating, GALVALUME), 5% Al-Zn (zinc-aluminum plating GALFAN), Aluminizing (aluminum plating), Zn-5Al-3MG (zinc-aluminum-magnesium plating).   Hot-dip galvanized Products (GI) Features: beautiful surface, good corrosion resistance, good processability.   Normal zinc spangle   By adding elements such as lead or antimony to the zinc solution, large and beautiful zinc flowers can be obtained.   Minimal ( None) zinc spangle   Hot-dip galvanized alloyed products (GA)   Features: good adhesion of painted zinc-iron alloy coated steel sheet, good corrosion resistance after painting, and good weld ability.   Hot-dip galvalume products (GALVALUME)   Features: good corrosion resistance, 2-6 times that of hot dip galvanizing, which is the conclusion of exposing the specimen to different environments for more than 15 years and comparing it with galvanized steel; good temperature resistance, can be used at 300°C without discoloration, such as allowing discoloration using temperature up to 700°C. It has excellent heat reflective surface.

The full name of pickling coil is "hot-rolled pickling coil", which usually refers to the product obtained by using hydrochloric acid (HCl) to remove the iron oxide scale on the hot-rolled surface. The pickled substrate is in direct contact with the environment, unlike the surface of the cold-rolled and annealed sheet, which usually has a dense oxide layer to play a certain protective role, so the surface of the pickled product is very prone to oxidized macular defects. In view of this characteristic of pickling products, there are special descriptions and reminders in the major standards. Taking Baosteel's enterprise standard Q/BQB 302 as an example, the description is as follows：   6.4.2 Steel sheets and strips with pickled surfaces can be delivered with or without oil. Under normal packaging, transportation, handling and storage conditions for pickled steel plates and steel strips that have been oiled, the supplier guarantees that no rust will occur within three months from the date of completion of production. . If the party requires the supply of pickled steel plates and strips without oil, it should be specified in the contract. Pickling steel plates and strips without oil coating are prone to rust and scratches during transportation and processing, and the supplier does not guarantee this. There are similar descriptions and hints for this in the various hot rolling standards. The causes of macular degeneration on the surface of acid-washed products are very complex Production, packaging, storage, transportation, and one-time processing may all occur in steel mills. Therefore, when analyzing macular defects, it is necessary to mobilize information from each link for comprehensive analysis in order to obtain accurate judgments. Many technicians like to analyze the elemental composition of the macula, and judge the cause by whether there is Cl residue. It has to be said that this method is simple and rude, and also has quantitative data, which is easily accepted by users. However, if you ignore the surface features of the macula, it is easy to ignore the real cause, resulting in a passive situation in the subsequent processing of abnormal materials.   Basic Routines About Quality Defect Analysis Friends who are familiar with our official account know that Brother Chai has always insisted on such a point of view: "Quality defect analysis and criminal investigation have a lot in common. They are essentially a kind of retrospective after the fact, and the result to find the cause. a process". Its reasoning mode is retrospective, and its method is the hypothesis verification and exclusion method that constantly approaches the target truth. The main difficulty it faces is how to discover the inner connection of things from the complicated appearance. Therefore, it is the basic routine of quality defect analysis to understand the background information of defective products, collect and classify the regularity and appearance of defects, and then comprehensively analyze with experience, and finally form a complete chain of evidence and confirm it.   Analysis of typical cases of macula   The wide strip-shaped macular parallel to the rolling direction will occur in both high-speed production lines and low-speed production lines, but oblique water-striped macules usually only exist in low-speed production lines, that is, in cross-cutting processing lines. is more likely. But why did the quality inspector not find the macula during the slitting process? Because the formation of macula requires an oxidation time, when the steel plate is contaminated by water traces, only the appearance of water traces appears, not the appearance of macular. We have encountered a reason for a similar appearance in the processing plant, which is for your reference in actual operation: During the high temperature season in summer, several blowers are placed on the side of the cross-cutting line to cool down, and one of them is facing the production line. Due to its particularity, the acid-washed macula needs to collect various information during analysis. At the same time, it is also necessary to choose high-quality and standardized processing plants for shearing.  

Non-stick roller coating process on aluminum material   In general,here’s two kinds coating process ways on the metal material.Spray coating and rolling coating.   Spraying is a traditional coating method that is dispersed into uniform and fine droplets by means of pressure or centrifugal force through a spray gun or disc atomizer and applied to the surface of the object to be coated.The main problem in spraying is the highly dispersed paint mist and volatilized solvent, which not only pollutes the environment, is not conducive to human health, but also wastes paint and causes economic losses.   The roller coating process is made by degreasing and chemical treatment on the surface of the metal substrate, then roller coating the high-quality paint, drying and curing.Through the high-performance roller coating process, the precision and flatness of the board can be more effectively controlled.And the unevenness and wrinkles caused by the tradition can be successfully eliminated. So that the architectural decoration color is uniform, delicate, soft and bright.   We focuses on the manufacturing of coated aluminum and steel coil.Equipped with large roller coating line specially designed for aluminum coil coating and introduced extra-wide aluminum coil coating line and extra-thick aluminum coil coating line, integrating tension setting, cleaning, drawing, embossing, crosscutting, slitting and many other processes, with an annual deep processing capacity of more than 150,000 tons.   With keen insight,we firmly grasp the market product update and alternation.We not only provide high quality coating aluminum on rail transit,new energy vehicles,petrochemical,shipbuilding,construction and industries.And also focus on development and application on the food grade coating aluminum material. In 2008 we introduced large-scale easy-open lids with an annual output of 15,000 tons coating process production line for pull ring aluminum.And then in 2012 we newly put into production in another two large-scale food grade aluminum rolling coating production lines and corresponding supporting equipment to meet the growing market demand.   Polytetrafluoroethene is a synthetic polymer material that uses fluorine to replace all hydrogen atoms in polyethylene.For short it’s also been called Teflon、PTFE、F4 and etc.Without doubt because of“Non stick coating”it’s well known by people.   The material has the characteristics of acid and alkali resistance and resistance to various organic solvents.And also it’s almost insoluble in all solvents.Meanwhile,Teflon has the characteristics of high temperature resistance.Its friction coefficient is extremely low, so it can be used for lubrication, and it has also become an ideal coating for the inner layer of easy-to-clean wok and water pipes.     With lower cost,excellent quality and greener environmental protection property.Dingang’s “non-stick” paint roller coating aluminum material can widely been used in the wok and fryer pan.We trust the wider commerce sea is waiting us to sail.   If you have any demand on the coating metal material,we sincerely welcome you visit and inquiry us.       Changzhou Dingang Metal Material Co.,Ltd www.prepaintedaluminium.com robert@cnchangsong.com Mobile: +86 15961206328 (What’s app & Wechat)

Except For Color-Coated Sheets, All The Outer Covering Parts Of Household Appliances Need To Be Painted Before They Are Made Into Finished Products, So As To Improve The Service Life And Decorative Properties Of Steel Parts In Household Appliances.   Improve The Service Life Of Steel Parts In Home Appliances All Steel Parts Are Rusted And Rotted In The Air Due To Contact And Penetration With Corrosive Media (O2, H2O, CI, Etc. In The Air) Until They Lose Their Original Mechanical Strength. In Order To Delay The Occurrence Of Corrosion, The Most Common Method Is To Apply An Organic Coating On The Surface Of The Steel Parts To Isolate The Steel Parts From The Corrosive Medium And Play A Role In Physical Protection.   Decorative Through The Application Of Organic Coating, The Cold And Monotonous Appearance Of The Steel Plate Can Be Completely Changed. The Organic Coating Can Endow The Steel Plate With Various Colors And Textures To Meet The Aesthetic Requirements.   Home Appliance Sheet Processing Process The Conventional Processing Process Of Home Appliance Steel Parts Is As Follows:   Shearing - Stamping - Degreasing - Rinsing - Surface Conditioning - Phosphating - Rinsing - Passivation (Sealing) - Drying - Powder Coating - Baking And Curing   Degreasing Process   There Are Two Commonly Used Degreasing Processes: Alkaline Water-Based Degreasing And Organic Solvent Degreasing. Alkaline Water Agent Degreasing: The Alkaline Chemical Degreasing Agent Is In Contact With The Anti-Rust Oil Film On The Surface Of The Steel Plate By Spraying, Brushing, Dipping, Electrolysis, Etc. And Has A Physical And Chemical Reaction To Remove The Anti-Rust Oil Film And The Carbon Residue Adsorbed During The Production Process Of The Steel Plate. , Iron Powder And Other Foreign Objects Are Removed. Commonly Used Alkaline Degreasing Agents Are Made By Dissolving Alkali Metal Salts Such As NaOH, Na2CO3, Na3PO4 And Other Compound Surfactants In Water In Proportion; And The Alkali Resistance Of The Organic Film, The Alkalinity Of The Degreaser Should Be Moderately Reduced. When Working, The Oil Is Emulsified Into A Milk-Like Mixture-Emulsion Through The Penetration, Infiltration, Emulsification And Dispersion Of The Oil Film, And Wraps Impurities Such As Carbon Powder And Iron Powder, And Leaves The Steel Plate And Enters The Degreasing Solution To Achieve Degreasing And Cleaning. Organic Solvent Degreasing: The Oily Metal Workpiece Is Placed In The Steam Of Trichloroethane, Trichloroethylene, Etc. To Remove The Oil Film From The Metal Surface. By Dissolving And Diluting The Rust Preventive Oil With Organic Solvents, The Oil With High Viscosity Is Reduced To A Very Low Viscosity, So That The Oil And The Metal Surface Are Loosened, And Then Washed Away By The Solvent Surrounding It. In Order To Strengthen The Dissolution Effect, Ultrasonic Cleaning Is Often Supplemented. When The Surface Of Electro-Galvanized/Hot-Dip Galvanized Fingerprint-Resistant Steel Plate Is Slightly Stained, It Can Be Wiped With A Clean Soft Cloth Dipped In Ethanol Or Propanol To Achieve The Effect Of Decontamination And Cleaning.   Phosphating Process And Basic Principle Phosphating Treatment Is To Place The Metal To Be Treated In A Phosphating Solution, And A Dense Chemical Conversion Film Is Formed On The Surface Through The Reaction Of Dihydrogen Phosphate And The Metal In The Phosphating Solution As A Chemical Pretreatment For Spraying Organic Coatings. The Treatment Method Is Usually Spraying Or Dipping. The Phosphating Of Household Appliances Is Mainly Based On Pseudo-Conversion Type Phosphating, And A Very Small Amount Of Conversion Type Phosphating Is Used (Only Applicable To Cold-Rolled Sheets). The Former Has Good Adhesion And Corrosion Resistance, While The Latter Has Better Processability And Shorter Processing Time, And Is Suitable For Fast Assembly Lines. Phosphating Can Convert The Activity Of The Metal Surface To A Minimum, And Reduce The Subsequent Corrosion Reaction To A Minimum. Phosphating Films Can Provide A "Rough Surface" To The Metal, Providing A Good Bite To Paint Or Other Organic Films And Enhancing Their Adhesion. The Equipotential And Insulating Properties Of The Phosphide Film Inhibit The Under-Film Corrosion Propagation Of The Organic Coating. Galvanized Steel Sheet Has Good Anti-Perforation Corrosion Performance Due To The Sacrificial Anode Protection Of Zinc Layer After Coating. Cold-Rolled Sheet Can Form Me2Fe(PO4)2·4H2O Crystals With Excellent Alkali Resistance Due To The Fe Content In The Phosphating Film. There Is Thus An Advantage In Preventing The Propagation Of Corrosion Under The Film.   Common Spraying Processes And Basic Principles The Most Commonly Used Spraying Process In Home Appliance Manufacturing Is Electrostatic Powder Coating. The Electrostatic Powder Coating Method Uses The Induction Effect Of High-Voltage Electric Field, So That The Powder Coating And The Object To Be Coated Are Induced And Charged With Opposite Charges Respectively, And The Powder Coating Is Adsorbed To The Object To Be Coated, And Then The Object To Be Coated Is Placed In A Baking Oven For Drying. Baked Leveling Film. Thermoplastic Powder Coatings Only Need To Be Melted And Leveled, While Thermosetting Powder Coatings Need To Be Cross-Linked And Cured To Form A Film After Leveling.     Advantages Of Electrostatic Powder Coating The Surface Of The Coated Object Can Be Sprayed Directly; It Is Suitable For The Coating Film With A Thickness Of 50-150 Μm, The Thickness Of The Coating Film Is Uniform, And It Is Not Easy To Sag; It Has Strong Adaptability To The Coated Object And Can Be Sprayed With Different Sizes And Shapes Of The Coated Object , Including The Inner And Outer Walls Of The Pipeline; Strong Adaptability To Various Powder Coatings, The Spilled Powder Coatings Can Be Recycled, And The Utilization Rate Of The Coatings Is High.  

1. Refrigerator Door   Parts Requirements: The Door Is Required To Have A Straight Appearance; It Has Suitable Hardness To Ensure That It Will Not Deform After Foaming. Material Requirements: The Appearance Is Straight; The Hardness Is Above HRB40. Recommended Materials: (1) Color-Coated Steel Sheet TDC51D+AZ 0.45-0.5mm. (2) Ordinary High-Strength Steel BJD300, 0.35-0.4mm, Yield Strength ≥ 300MPa. (3) Oil-Resistant Color-Coated Sheet TDC51D+Z, 0.4-0.5 Mm. (4) Antibacterial Color Coated Board TSECD/TDC52D+Z, 0.4-0.5mm. (4) Antibacterial Color Coated Board TSECD/TDC52D+Z, 0.4-0.5mm. 2. Back Panel   Parts Requirements: Good Corrosion Resistance, Good Heat Resistance, Heat Dissipation And Beautiful Appearance Surface Are Required. Material Requirements: Good Processing Properties. Recommended Materials: (1) Chrome-Free,AFP, Spangle Aluzinc Sheet DC51D+AZ, 0.28-0.35mm; (2) High-Strength, Chrome-Free, AFP, Spangle Aluzinc Sheet DC51D+AZ, 0.28-0.29mm.     3. U Panel   Parts Requirements: U Panel Requires Appropriate Rigidity For Easy Handling; Straight Appearance; Appropriate Hardness To Ensure No Deformation After Foaming. Material Requirements: The Appearance Is Straight; The Thickness Is Above 0.35mm And The Hardness Is HRB40. Recommended Materials: (1) Color-Coated Sheet TDC51D+AZ 0.45-0.5mm. (2) Ordinary High-Strength Steel BJD300, 0.35-0.4mm, Yield Strength ≥ 300MPa. (3) Oil-Resistant Color-Coated Sheet TDC51D+Z, 0.4-0.5 Mm. (4) Antibacterial Color Coated Board TSECD/TDC52D+Z, 0.4-0.5mm.     4. Bottom Plate   Parts Requirements: The Bottom Plate Requires No Fatigue Cracking Under Vibration Conditions, And Has Suitable Strength To Meet The Bearing Requirements. Material Requirements: Good Stamping Performance, Suitable Strength And Tensile Strength. Recommended Material: Hot-Dip Galvanized DC51D+Z, 1-1.2mm, Used After Spraying.       5. Hinges   Parts Requirements: The Hinge Must Have Appropriate Strength And Rigidity To Ensure That It Does Not Deform After Bearing. Material Requirements: Smooth Appearance, Yield Strength Above 200MPa. Recommended Material: (1) Normal Cold SPCC, 3mm, Used After Electroplating. (2) Hot-Dip Galvanized High-Strength Steel BJG-PX, 1-1.2mm, Tensile Strength> 380MPa.  

Aluminum Surged To A 13-Year High In London As Booming Demand And A Swath Of Smelter Closures From China To Europe Bring The Risk Of Shortages Of The Crucial Industrial Metal.   Prices Rose As Much As 3.3% To $3,236 A Ton On The London Metal Exchange, Surpassing A Peak In October To Reach The Highest Since 2008. Aluminum Is The Best Performer On The LME This Year, And The Next Target For Bullish Investors Who’ve Been Drawn Into The Rapidly Tightening Market Is An All-Time High Above $3,380.   Key Raw Materials From Nickel To Crude Oil Have Surged In Recent Months As Consumption Has Risen Sharply With The World Emerging From The Pandemic While Supply Hasn’t Kept Up, Stoking Inflation Concerns. Goldman Sachs Group Inc. Raised Its 12-Month Target On Aluminum To A Record $4,000 A Ton, Citing Supply Disruptions Stemming From Power Rationing In China And Europe At A Time Of “Exceptional” Developed-Market Demand.   “Aluminum Markets Are Facing A Melt-Up In Prices This Year, Driven By Simultaneous Deficits In Both China And Ex-China Drawing On Already Low Stock Of Inventory,” Goldman Analysts Including Nicholas Snowdon And Jeffrey Currie Said In A Note.   The Global Aluminum Market Is In The Widest Backwardation Since 2018, And Prices Have Risen 13% In London This Year. With Smelters In Europe Battling An Energy Crisis And Chinese Supply At Risk From A Burgeoning Covid Outbreak, Buyers Are Drawing Rapidly From Stockpiles And Pushing Them To Critically Low Levels. “A Key Attribute Of Physical Scarcity Is That It Has A Propensity To Spread, Creating Additional Volatility In Prices Throughout The Economy,” The Goldman Analysts Said In The Emailed Note. The Bloomberg Commodity Spot Index, Which Tracks Energy, Metals And Crop Prices, Climbed To Its Highest Ever This Month, And Has More Than Doubled From A Four-Year Low Reached Early In The Pandemic. Aluminum Rose 1.6% To Settle At $3,183 A Ton At 5:53 P.M. On The LME. Other Main LME Metals Were Mixed, With Copper Little Changed And Nickel Falling. “It’s A Perfect Storm For Aluminum Right Now, With The European Energy Crisis And The Situation In China Still Restricting Supply,” Said Wenyu Yao, Senior Commodities Strategist At ING Bank. Some Investors Have Been Long Aluminum While Shorting Copper, According To Yao.  

Useage:   Automotive Industry Muffler., Exhaust Pipe, Fuel Tank, Heat Shield, Reactor Parts And Manifold Cover, Central Pipe; Construction. Agricultural And Mining Machinery; Diesel Engine Muffler And Heat Shield, Garden Machinery Muffler; Home Appliances: Ovens, Microwave Ovens, Rice Cookers, Slow Cookers, Toasters, Electric Water Heaters, Disinfection Cabinets; Air Conditioners, Heat Exchangers, Electric Heaters, Dryers, Ice Machines, Etc.; Gas And Oil Products: Gas Water Heaters, Gas Rice Cookers, Gas Stoves, Gas Ovens, Oil-Fired Boilers, Oil-Fired Stoves; Kitchen Utensils: Frying Pan, Boiling Water Kettle, Bakeware.