Shanghai Lianheng Metal Surface Treatment Co., Ltd.

(Chinese Version)  

Founded in the year 2000 and located in Shanghai Qingpu Industrial Park, Shanghai Lianheng Metal Surface Treatment Co., Ltd. is a professional supplier of surface treatment specializing in surface anti-corrosive treatment for auto parts, metal hardware, fasteners, electric appliance and aluminum profile.

We own the production lines of electrostatic powder coating, auto parts coating, Decromet and spray-paint. What’s more, in order to guarantee the high quality of our products, our company is well equipped with all kinds of testing and experimental equipment such as coating thickness gauge, paint membrane impacting tester, salt spray testing chamber and visual color comparator.

As one of the members of China Surface Engineering Association, our company owns different surface treatment technology, like electrostatic powder coating, Decromet, common and medium anti-corrosive treatment. We have done metal surface treatment for many fastener companies, such as Japan NSK Co., Ltd., Japan FUJINITTEI Co., Ltd., AIRONWARE-SHANGHAI, Superior Fastening (Shanghai) Ltd. and dozens of fastener companies from Jiangsu and Zhejiang. Our company earns the trust from clients for its reliable product quality.

With the business concept of " Quality first, Service supreme", we provide our clients with quality products and excellent service. Warmly welcome new and regular clients to send us inquiries! We believe that we will be your most reliable partner.

The introduction of the products:
1) Common anti-corrosive treatment series (stoving varnish)
It’s a common technique of anti-corrosive treatment composing of two layers. And the first layer is the chemical coating which penetrating into the iron molecule; the second one is the sintered surface layer with corrosion resistance, which is 2-3 times better than the electro-galvanized corrosion resistance.

Application scope: metal hardware, fasteners, mechanical parts, metal chains, all kinds of screws, nuts, metal nails, etc.

Advantages: competitive prices; different colors, products which can last 180-220 hours in a salt spray test.

Performance Testing:
Adhesion (100 cells): Grade 1
Pencil hardness: 2-3h;
The Impact CM?KG: 50
Neutral salt spray time: 80-120h

2) Medium anti-corrosive treatment series
It’s a senior technique of anti-corrosive treatment with excellent corrosion resistance, It’s made of 3 layers: the first one is the metal galvanized layer; the second one is special resin coating layer and the third one is the surface sintering layer with good corrosion resistance.

Application scope: fasteners, hardware, metal nails, accessories used in construction, decoration, auto and household electric appliance, which are required stronger corrosion resistance

Advantages:   good corrosion resistance and the neutral salt spray testing time is RU1-500h, RU2-720h?different colors: the common colors include silver grey, blue and dark; good comprehensive anti-corrosive performance


Performance Testing:
Adhesion (100 cells): Grade 1
Pencil hardness: 4-5h;
The Impact CM KG: 50
Neutral salt spray time: RU1-500h?RU2-720h

3) Top anti-corrosive treatment series
It’s a special anti-corrosive treatment with a higher rate than the a higher rate than Medium anti-corrosive treatment, composing of two anti-corrosive layers. The first one is the zinc nickel coating and the second one is the special coating thin COSMA. It has excellent corrosion resistance.

Application scope: auto parts and the electronic parts

Advantages: the excellent corrosion resistance, the neutral salt spray testing time is above RU1-1000h, RU2-720h?ultra-thin,   thin coating; environmental style, without chrome, acid and other hazardous substances.

Performance Testing:
Adhesion (100 cells): Grade 1
Pencil hardness: 2-3h;
The Impact CM?KG: 50
Neutral salt spray time: above

4) Environmental Dacromet
It’s a special surface treatment of new technology, namely, forming zinc-chromium coating on the subjects with a new anti-rust technology. It has high corrosion resistance. And the Salt spray test time can reach more than 1000h.

Application scope: fasteners for special use, auto parts   
Advantages: Superior corrosion resistance; neutral salt spray testing time is over 1000 hours; high heat resistance; no hydrogen embrittlement; good recoated ability; no environmental pollution.

5) Head stoving varnish
To head paint the fasteners with special use, making the fasteners consistent with the appliance, furniture, the main instruments for a integrated aesthetic

Application scope: Household electric appliances, furniture, instruments, decorations, etc.

Advantages: low cost, various colors; enhancing the corrosion resistance to extend the span of the products; no pollution for using the environmental paint.