The most comprehensive metal surface treatment summary

The surface treatment is the formation of a layer of one or more special properties on the surface of a material by physical or chemical means. Through the table

Surface treatment can improve the appearance of the product, texture, function and other aspects of performance.

First, anodizing

Mainly aluminum anodizing is the use of electrochemical principles to form a layer of Al2O3 (alumina) film on the surface of aluminum and aluminum alloy. This layer

The oxide film has special properties such as protection, decoration, insulation and wear resistance.

Process flow:
Monochrome, gradient:
Polishing / sand blasting / drawing → degreasing → anodizing → neutralization → dyeing → sealing → drying
Two colors:
1 polishing / sand blasting / drawing → degreasing → shading → anodizing 1 → anodizing 2 → sealing → drying
2 polishing / sand blasting / drawing → degreasing → anodizing 1 → laser engraving → anodizing 2 → sealing → drying

Technical features:
1, increase the strength
2, achieve any color other than white
3, to achieve nickel-free sealing, to meet the requirements of Europe, the United States and other countries for nickel-free

Technical difficulties and key points for improvement:
The yield level of anodizing is related to the cost of the final product. The focus of improving the oxidation yield is the appropriate amount of oxidant, suitable.

Temperature and current density, which require structural parts manufacturers to continuously explore in the production process, seeking breakthroughs.

Products Recommended:
E+G curved handle, anodized material, environmentally friendly and durable.

Second, electrophoresis

Used in stainless steel, aluminum alloy, etc., it can make the product appear in various colors, and maintain the metallic luster, while enhancing the surface properties, it has better

Anti-corrosion properties.

Process flow:
Pretreatment → electrophoresis → drying

advantage:
1, rich in color;
2, no metal texture, can be combined with sandblasting, polishing, drawing, etc.;
3, processing in a liquid environment, can achieve the surface treatment of complex structures;
4, the process is mature, mass production.

Disadvantages:
The ability to cover defects is general, and the electroforming of die-casting parts requires higher pre-treatment.

Third, micro arc oxidation

The process of applying a high voltage to form a ceramized surface film layer in an electrolyte solution (generally a weakly alkaline solution), which is a physical discharge

The result of synergy with electrochemical oxidation.

Process flow:
Pretreatment → Hot water wash → MAO → Drying
advantage:
1, ceramic texture, dull appearance, no high-gloss products, delicate touch, anti-fingerprint;
2. Wide range of substrates: Al, Ti, Zn, Zr, Mg, Nb, and alloys thereof;
3, the pre-treatment is simple, the product has excellent corrosion resistance, weather resistance and good heat dissipation performance.

Disadvantages:
At present, the color is limited, only black, gray, etc. are more mature, and bright colors are currently difficult to achieve; the cost is mainly affected by high power consumption,

One of the most costly aspects of surface treatment.

Fourth, PVD vacuum plating

Full name physical vapor deposition, a process in industrial manufacturing, is a technology that mainly uses physical processes to deposit thin films.

Process flow:
Pre-PVD cleaning→Intake vacuuming→washing target and ion cleaning→coating→coating finish, cooling out→posting (polishing, AFP)

Technical features:
PVD (Physical Vapor Deposition) can be plated on metal surfaces with high hard plating and high wear resistance.

Porcelain decorative coating

Five, plating

It is a process of attaching a metal film to the surface of a metal by electrolysis to prevent corrosion, improve wear resistance, conductivity, and anti-

A technique for the effects of light and aesthetics.

Process flow:
Pretreatment → Cyanide-free copper → Cyanide-free white copper tin → Chrome plating

advantage:
1. High gloss and high quality metal appearance;
2. The substrate is SUS, Al, Zn, Mg, etc.; the cost is lower than PVD.

Disadvantages:
Environmental protection is poor and the risk of environmental pollution is high.

Six, powder coating

The powder coating is sprayed onto the surface of the workpiece by a powder spraying device (electrostatic spray machine), and the powder is uniformly adsorbed under the action of static electricity.

The surface of the workpiece forms a powdery coating; the powder coating is cured by high temperature baking and flattening, and the effect is different (different kinds of powder coating)

The final coating of the class effect).

Process flow:
Upper part→electrostatic dust removal→spraying→low temperature leveling→baking

advantage:
1, rich in color, high gloss, matte optional;
2, low cost, suitable for building furniture products and heat sink shells;
3. High utilization rate, 100% utilization, environmental protection;
4, strong ability to shade defects; 5, can imitate wood grain effect.

Disadvantages:
Currently used for electronic products is relatively small.

Eight, sandblasting

Compressed air is used as the power to form a high-speed jet beam to spray the spray at a high speed to the surface of the workpiece to be treated, so that the surface of the workpiece surface

A process in which the appearance or shape of the face changes to achieve a certain degree of cleanliness and different roughness.

Technical features:
1. Achieve different reflections or matt.
2. It can clean the tiny burrs on the surface of the workpiece and make the surface of the workpiece smoother, eliminating the damage of the burr and improving the grade of the workpiece.
3, clear the residual dirt left in the pre-treatment, improve the smoothness of the workpiece, can make the workpiece exposed uniform and uniform metal color, so that the workpiece appearance

More beautiful and beautiful.

Products Recommended:
E+G classic bridge handle, sandblasted surface, high-end atmosphere.

Nine, polished

Modification of the surface of the workpiece with a flexible polishing tool and abrasive particles or other polishing media. For different polishing processes:

Rough polishing (basic polishing process), medium polishing (finishing process) and fine polishing (glazing process), the best polishing can be achieved by using a suitable polishing wheel.

The effect, while improving the polishing efficiency.

Process flow:
Technical features:
Improve the dimensional accuracy or geometric accuracy of the workpiece to achieve a smooth surface or mirror gloss, while also eliminating gloss.

Products Recommended:
E+G long handle, polished surface, simple and generous

X. Etching

Generally, the etching referred to as photochemical etching refers to removing the protective film of the region to be etched after exposure plate making and development, during etching.

Contact with the chemical solution to achieve the effect of dissolving corrosion, forming the effect of unevenness or hollowing.

Process flow:
Exposure method:
The project is based on the drawing to prepare the material size – material preparation – material cleaning – drying → film or coating → drying → exposure → development → drying – ec

Engraved → stripped → OK
Screen printing method:
Cutting→cleaning plate (stainless steel other metal materials)→screen printing→etching→release film→OK

advantage:
1. Fine processing of metal surfaces;
2. Give special effects to the metal surface;

Disadvantages:
Corrosive liquids (acids, alkalis, etc.) used in etching are mostly harmful to the environment.

The most comprehensive metal surface treatment summary in history (process flow + advantages and disadvantages)

Surface treatment is the formation of a layer of one or more special properties on the surface of a material by physical or chemical means. Through the table

Surface treatment can improve the appearance of the product, texture, function and other aspects of performance.

First, anodizing

Mainly aluminum anodizing is the use of electrochemical principles to form a layer of Al2O3 (alumina) film on the surface of aluminum and aluminum alloy. This layer

The oxide film has special properties such as protection, decoration, insulation and wear resistance.

Process flow:
Monochrome, gradient:
Polishing / sand blasting / drawing → degreasing → anodizing → neutralization → dyeing → sealing → drying
Two colors:
1 polishing / sand blasting / drawing → degreasing → shading → anodizing 1 → anodizing 2 → sealing → drying
2 polishing / sand blasting / drawing → degreasing → anodizing 1 → laser engraving → anodizing 2 → sealing → drying

Technical features:
1, increase the strength
2, achieve any color other than white
3, to achieve nickel-free sealing, to meet the requirements of Europe, the United States and other countries for nickel-free

Technical difficulties and key points for improvement:
The yield level of anodizing is related to the cost of the final product. The focus of improving the oxidation yield is the appropriate amount of oxidant, suitable.

Temperature and current density, which require structural parts manufacturers to continuously explore in the production process, seeking breakthroughs.

Products Recommended:
E+G curved handle, anodized material, environmentally friendly and durable.

Second, electrophoresis

Used in stainless steel, aluminum alloy, etc., it can make the product appear in various colors, and maintain the metallic luster, while enhancing the surface properties, it has better

Anti-corrosion properties.

Process flow:
Pretreatment → electrophoresis → drying

advantage:
1, rich in color;
2, no metal texture, can be combined with sandblasting, polishing, drawing, etc.;
3, processing in a liquid environment, can achieve the surface treatment of complex structures;
4, the process is mature, mass production.

Disadvantages:
The ability to cover defects is general, and the electroforming of die-casting parts requires higher pre-treatment.

Third, micro arc oxidation

The process of applying a high voltage to form a ceramized surface film layer in an electrolyte solution (generally a weakly alkaline solution), which is a physical discharge

The result of synergy with electrochemical oxidation.

Process flow:
Pretreatment → Hot water wash → MAO → Drying
advantage:
1, ceramic texture, dull appearance, no high-gloss products, delicate touch, anti-fingerprint;
2. Wide range of substrates: Al, Ti, Zn, Zr, Mg, Nb, and alloys thereof;
3, the pre-treatment is simple, the product has excellent corrosion resistance, weather resistance and good heat dissipation performance.

Disadvantages:
At present, the color is limited, only black, gray, etc. are more mature, and bright colors are currently difficult to achieve; the cost is mainly affected by high power consumption,

One of the most costly aspects of surface treatment.

Fourth, PVD vacuum plating

Full name physical vapor deposition, a process in industrial manufacturing, is a technology that mainly uses physical processes to deposit thin films.

Process flow:
Pre-PVD cleaning→Intake vacuuming→washing target and ion cleaning→coating→coating finish, cooling out→posting (polishing, AFP)

Technical features:
PVD (Physical Vapor Deposition) can be plated on metal surfaces with high hard plating and high wear resistance.

Porcelain decorative coating

Five, plating

It is a process of attaching a metal film to the surface of a metal by electrolysis to prevent corrosion, improve wear resistance, conductivity, and anti-

A technique for the effects of light and aesthetics.

Process flow:
Pretreatment → Cyanide-free copper → Cyanide-free white copper tin → Chrome plating

advantage:
1. High gloss and high quality metal appearance;
2. The substrate is SUS, Al, Zn, Mg, etc.; the cost is lower than PVD.

Disadvantages:
Environmental protection is poor and the risk of environmental pollution is high.

Six, powder coating

The powder coating is sprayed onto the surface of the workpiece by a powder spraying device (electrostatic spray machine), and the powder is uniformly adsorbed under the action of static electricity.

The surface of the workpiece forms a powdery coating; the powder coating is cured by high temperature baking and flattening, and the effect is different (different kinds of powder coating)

The final coating of the class effect).

Process flow:
Upper part→electrostatic dust removal→spraying→low temperature leveling→baking

advantage:
1, rich in color, high gloss, matte optional;
2, low cost, suitable for building furniture products and heat sink shells;
3. High utilization rate, 100% utilization, environmental protection;
4, strong ability to shade defects; 5, can imitate wood grain effect.

Disadvantages:
Currently used for electronic products is relatively small.

Eight, sandblasting

Compressed air is used as the power to form a high-speed jet beam to spray the spray at a high speed to the surface of the workpiece to be treated, so that the surface of the workpiece surface

A process in which the appearance or shape of the face changes to achieve a certain degree of cleanliness and different roughness.

Technical features:
1. Achieve different reflections or matt.
2. It can clean the tiny burrs on the surface of the workpiece and make the surface of the workpiece smoother, eliminating the damage of the burr and improving the grade of the workpiece.
3, clear the residual dirt left in the pre-treatment, improve the smoothness of the workpiece, can make the workpiece exposed uniform and uniform metal color, so that the workpiece appearance

More beautiful and beautiful.

Products Recommended:
E+G classic bridge handle, sandblasted surface, high-end atmosphere.

Nine, polished

Modification of the surface of the workpiece with a flexible polishing tool and abrasive particles or other polishing media. For different polishing processes:

Rough polishing (basic polishing process), medium polishing (finishing process) and fine polishing (glazing process), the best polishing can be achieved by using a suitable polishing wheel.

The effect, while improving the polishing efficiency.

Process flow:
Technical features:
Improve the dimensional accuracy or geometric accuracy of the workpiece to achieve a smooth surface or mirror gloss, while also eliminating gloss.

Products Recommended:
E+G long handle, polished surface, simple and generous

X. Etching

Generally, the etching referred to as photochemical etching refers to removing the protective film of the region to be etched after exposure plate making and development, during etching.

Contact with the chemical solution to achieve the effect of dissolving corrosion, forming the effect of unevenness or hollowing.

Process flow:
Exposure method:
The project is based on the drawing to prepare the material size – material preparation – material cleaning – drying → film or coating → drying → exposure → development → drying – ec

Engraved → stripped → OK
Screen printing method:
Cutting→cleaning plate (stainless steel other metal materials)→screen printing→etching→release film→OK

advantage:
1. Fine processing of metal surfaces;
2. Give special effects to the metal surface;

Disadvantages:
Corrosive liquids (acids, alkalis, etc.) used in etching are mostly harmful to the environment.