Qingdao Hilien Machinery Co., Ltd.

Surface Finishing Capabilities:

Wet painting

Powder coating

EC-Coating (Electrodeposition coating)

Electrolytic zinc plating

Electrolytic zinc-iron alloy coating

Electrolytic zinc-nickel plating (Zn, Ni) 12-15%

Zinc flake (Geomet) / Dacromet 6µ,10µ and 12µ.

Hot-dip galvanisation (HDG) acc. EN/ISO 1461

Black oxide coating

Anodising

Passivation

Chromating

Polish and mirror polishing (Stainless and Aluminium castings)

Corr-I-Dur

Nitrocarburising

Sand blasting and primer

1. Metal Plating

Metal plating entails applying a coat over the surface of the metal. It can also entail altering the external structure of the metal so that it can be safe. There are two main types of metal plating for metal finishes. These are;

-Electroplating

-Electroless plating

Electroplating which is also known as electrodeposition entails passing the electric current through a solution of an electrolyte. The two electrodes are dipped in the solution then are connected to a power source. These electrodes are metals that should be electroplated. The atoms of the electrolyte will form on the electrodes.

The electrolyte chosen will depend on your target goal. For instance, gold electrolyte can be chosen for its aesthetic value while zinc will be chosen for its protective role.

On the other hand, electroless metal plating does not involve the use of electric current to coat the metal. Instead, the metal is immersed in a solution full of copper, nickel or any other targeted coating medium.

Electroless metal plating is an ideal method for enhancing corrosion resistance of a metal. It is also used on entails that will be used for sensitive applications such as food and gas industry.

2. Brushed metal finishing

Brushed metal finishing is usually done with the purpose of removing all the imperfections that may be lying on the surface of the metal. The finishing is aimed at creating a smooth and uniform texture on the metal surface.

A wire brush or an abrasive belt can be used for doing this job. The brushing is unidirectional hence can create a desired aesthetic appeal. The method is commonly used in the automotive industry and for electric appliances.

3. Buff Polishing

Buff polishing is considered as the best alternative for the electroplating method of metal finishing. It can achieve the same result as electroplating without the use of electrochemical. Instead, a buff machine with a cloth wheel is rolled over the metal surface. The result is a clean, smooth and glossy finishing.

You should consider using it if you want to achieve a smooth finishing. This explains why it is mainly considered for metals that will be used for decorative applications. However, it is not ideal for the fragile and complicated applications due to the limited nature of the cloth wheel.

4. Metal Grinding

Metal grinding entails scrubbing out the surface of the metal so as to get rid of any imperfections or metal ions. The grinding machine utilizes the forces of friction and abrasion to smoothen the metal surface.

There are many grinding tool options that can be used for such applications. They include bench grinders, wheel grinders, custom grinding machines, among others. The choice of a grinding tool will depend on the type of metal and area of application.

Metal grinding is a preferred choice of metal finishes that require shallow cuts.

5. Sand Blasting

You can use the sandblasting technique of metal finishing when you want to attain a uniform matte texture on your metal. Also known as bead blasting, the method forces metal pellets, sand, steel shots, and other abrasives into a single substrate.

An abrasive medium that is flowing at a high speed is forced against the metal to remove all forms of debris. The speed and pressure of the medium can be controlled depending on the goal that you would like to achieve. This method can also be used to prepare the metal for other types of finishes such as coating.

6. Powder coating

Although it is usually viewed as a decorative method finishing method, there is more than you can achieve with powder coating. It increases the durability of metal. Powder coating entails melting dry plastic powder onto the surface of the metal. The result is a matte, smooth texture and glossy coating. Powder coating can also eliminate the surface blemishes on a metal.

7. Hot blackening

This type of metal surface finishing entails spreading a thin layer of black oxide onto the surface of the metal. The end result is a matte black finish that has a high resistance to corrosion and abrasion.

The process is characterized by high temperature so coolant is used after the finishing. Hot blackening is mainly used during the production of automotive parts.