Surface Finishing Service

Hongjingyuan Hardware has always had its own unique understanding of surface treatment of metal CNC machining parts, and our customers have always given 100% recognition to our surface treatment service. We have up to 15 surface treatment services, sandblasting, polishing, anodizing, etc.

Name

Material

Cosmetic availability

Machining marks

Tolerances
Color
01

As machined​

Metal&Plastic

No

Visible, Light Surface Scratches

Tolerances are not affected

N/A

02

Smooth machining

Metal&Plastic

No

Visible, Light Surface Scratches

Tolerances are not affected

N/A

03

Fine machining

Metal

No

Slightly Visible

Tolerances are not affected

N/A

04

Polishing

Metal

Always Cosmetic

Remove on main surface

Met after polishing

N/A

05

Bead blasting

Metal

On request

Remove non-makeup, remove make-up from major surfaces

Not affected except for specific functions*

N/A

06

Brushing

Metal

On request

Reduced for non-cosmetic, removed on primary surfaces for cosmetic

Met after brushing

N/A

07

Anodizing Type II

Aluminum

On request

Reduced for non-cosmetic, removed on primary surfaces for cosmetic

Met after anodizing

Black, Clear, Red, Blue, Gold, Orange

08

Anodizing Type III

Aluminum

No

Removed on Primary surfaces

Met after anodizing

Black, Natural

12

Black oxide

Copper, Stainless steel, Alloy steel, Tool steel, Mild steel

No

Visible

Met after coating

Black

09

Chromate conversion coating

Aluminum

No

Visible

Met after coating

Clean

10

Electroless nickel plating

mild steel, aluminum, stainless steel

No

Reduced but visible

Met after electroless nickel plating

Metallic (semi-bright)

11

Brushed + Electropolishing

Stainless steel

Always cosmetic

Removed on Primary surfaces

Met after electropolishing

N/A

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Powder coating

Metals

No

Removed

Met before powder coating

Black, White, RAL/Pantone

What Is Surface Treatment?

Surface treatment is often used for the two purposes of adding surface beauty and increasing comfort to parts. These two purposes are usually considered decorative, but surface treatment can often also add a certain degree of protection to the part.Common operations that use surface treatments to increase part comfort: deburring, deburring of sharp edges. Increase the aesthetics of the surface of the parts: polishing, sandblasting, etc. Enhance part performance: anodizing, etc.

Why Surface Treatment Is Important?The benefits of surface treatment

  • Improve appearance
  • Adjust the sizes
  • Add specific beautiful colors
  • Change the luster
  • Enhance chemical resistance
  • Increase wear resistance
  • Limit effects of corrosion
  • Reduce friction
  • Remove surface defects
  • Cleaning the parts
  • Serve as a primer coat
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Hongjingyuan-A Metal Finishing Company With Mature Metal Finishing Technologies

Let the CNC machined metal parts processed have a beautiful appearance and a tougher surface, which is what every customer of custom CNC machined parts wants, and Hongjingyuan Hardware can help you achieve it. We Hongjingyuan Hardware is a mature technology CNC machining company, we provide full metal surface treatment services, we provide different types of quality metal finishing, there is always one suitable for you

1.Anodizing (Anodized)

The function of anodizing is to form a thin layer of metal oxide on the outside of the parts. This layer of metal oxide can well enhance the corrosion resistance and wear resistance of the metal, and anodizing can add a beautiful appearance to the metal surface. color

2.Plating (Electroplating)

The process of using an electric current to reduce dissolved metal cations so that they form a thin, coherent metal coating on the electrode to change the properties of the metal surface or add thickness to undersized parts. We often use chrome plating, nickel plating, etc.

3.Passivation

A common chemical finishing method, mostly used on steel and stainless steel, that uses a thin layer of protective material to form the outer shell to enhance corrosion resistance or reduce chemical reactivity. The passivation of stainless steel removes free iron and ferrous contaminants from metal surfaces with an acid solution to prevent rusting.

4.Black Oxide

Black oxide technology, also known as blackening or airbrushing, is a chemical process that creates a black conversion coating on stainless steel, copper and copper-based alloys, zinc, powdered metals, silver solder, and ferrous materials. Black Oxide coatings increase the corrosion resistance of part surfaces and minimize light reflections.

5.Painting

Painting is also a surface treatment process that increases the surface beauty of CNC machined parts and prevents corrosion or oxidation, but the protection ability of CNC machined parts is not as strong as the above surface treatment processes. It is a relatively comprehensive surface treatment process, but Painting can be done on any metal and non-metal parts

6.Satin Finish

Some parts or materials have a matte finish because the surface has an uneven matte finish and a bright glossy finish, we want these satin metal finishes to be reflective, flat, and shiny, we need to use a satin finish , the visual effect of the satin-finished surface is related to the lighting of the part and the environment

7.Polishing

Polishing is also known as polishing. Some parts have very rough surfaces when they are processed. If we want the surface of the part to have a smooth and shiny surface, then we need to rub the surface of the part or use chemical reactions. Produces a smooth, shiny surface that gives a specular reflection to the surface or reduces the diffuse reflection of the surface

8.Abrasive Blasting (Sandblasting)

The role of sandblasting is to change the surface smoothness, or the surface roughness, and has a certain ability to beautify the surface. Abrasive blasting is the operation of using blasting equipment such as an air pressure system to propel a stream of abrasive material consisting of high-velocity sand grains into a metal surface under high pressure to remove surface contaminants, clean the metal, or add texture

9.Powder Coating

Powder coating is very common, we see it in household appliances, aluminum profiles, automobiles, motorcycles, bicycle parts, most hardware accessories, and powder coating is the process of placing functional and decorative finishes (by electrostatic technology to applied as a free-flowing dry powder) and then cured in a heated environment, the powder coating creates a tougher finish than conventional coatings

10.Conversion coating

Conversion coating, also known as chelate conversion, is used primarily as a corrosion inhibitor, to decorate finishes, or to maintain electrical conductivity. Conversion coating is the conversion of metals into protective layers through chemical or electrochemical processes.


11.Heat Treatment

There are many heat treatment processes, including annealing, tempering, hardening, precipitation strengthening, carburizing, normalizing, quenching, etc. Heat treatment is generally the use of heating or chilling at extreme temperatures to achieve a certain state or change certain properties

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