A. Anodic Oxidation
It is mainly the anodic oxidation of aluminum, which is the formation of an Al2O3 (alumina) film on the surface of aluminum and aluminum alloy using electrochemical principles.The oxide film has the special characteristics of protection, decoration, insulation and wear resistance.
Process Flow:
Monochrome, gradient: polishing/sandblasting/drawing → oil removal → anodic oxidation → neutralization → dyeing → sealing → drying
Double Color:
(1) Polishing/sandblasting/wire drawing → oil removal → shielding → anodizing 1→ anodizing 2 → sealing → drying [TJC STEEL]
Polishing/sandblasting/wire drawing → oil removal → anodizing 1 → radium carving → anodizing 2 → sealing → drying
Technical characteristics
1. Lifting Intensity;
2. Realize Any Color Except White;
3. Realize nickel-free hole sealing to meet the nickel-free requirements of Europe, the United States and other countries.
Technical difficulties and key points of improvement:
The yield level of anodic oxidation is related to the cost of the final product. The key to improve the oxidation yield is the appropriate amount of oxidant, the appropriate temperature and the current density, which requires the manufacturers of structural parts to continuously explore and seek breakthroughs in the production process. [TJC STEEL]
B. Electrophoresis
Used for stainless steel, aluminum alloy, etc., can make the product appear a variety of colors, and keep the metallic luster, at the same time enhance the surface performance, has a better anti-corrosion performance.
Process: pretreatment → electrophoresis → drying [TJC STEEL]
Technical Features:
Advantages:
1. Rich colors;
2, no metal texture, can cooperate with sand blasting, polishing, drawing, etc.;
3, the liquid environment processing, can achieve the surface treatment of complex structure;
4. Mature process and mass production.
Disadvantages:
The ability to conceal defects is general, and the need for pretreatment of die casting by electrophoresis is high. [TJC STEEL]
C. Micro-arc Oxidation (MAO)
Advantages:
1. Ceramic texture, dark and dumb appearance, no high-gloss products, delicate feel, anti-fingerprint;
2. Wide range of substrate: Al, Ti, Zn, Zr, Mg, Nb, and their alloys;
3. Simple pretreatment, excellent corrosion resistance, weather resistance and heat dissipation. [TJC STEEL]
Disadvantages:
At present, the color is limited, only black, gray and other mature, bright color is difficult to achieve;The cost is mainly affected by high power consumption, is one of the highest surface treatment costs.
D. Electroplating
Electroplating is the use of electrolysis to make the metal surface attached to a layer of metal film technology to prevent corrosion, improve wear resistance, electrical conductivity, reflective and enhance the role of beautiful technology.
Process flow:
Pretreatment → cyanide-free alkaline copper → cyanide-free copper tin → chrome plating
Technical features:
Advantages:
1, high gloss coating, high quality metal appearance;
2. The substrate is SUS, Al, Zn, Mg, etc.The cost is lower than PVD.
Disadvantages:
Environmental protection is poor, the risk of environmental pollution is greater.
E. Powder Coating [TJC STEEL]
Powder Coating is the use of powder spraying equipment (electrostatic spray molding machine) powder coating on the surface of the workpiece, in the electrostatic action, powder will be uniform adsorption on the surface of the workpiece, forming a powder coating;The powdery coating is baked at high temperature and then smoothed and cured to become the final coating with different effects (different kinds of effects of powder coatings).
Process flow:
Top → electrostatic dust removal → spraying → low temperature leveling → baking
Technical features:
Advantages:
1, rich color, highlight, matte optional; [TJC STEEL]
2. Low cost, suitable for building furniture products and radiator housing;
3, high utilization rate, 100% utilization, environmental protection;
4. Strong ability to cover defects;5, can copy the effect of wood grain.
F. Metal Drawing
Metal Drawing is a kind of surface treatment means that forms a line pattern on the surface of the workpiece by grinding the product and plays a decorative effect.According to the different lines after drawing can be divided into: straight drawing, random drawing, ripple, spiral. [TJC STEEL]
Technical features:
Wire-drawing treatment can make the metal surface obtain non-mirror-like metallic luster, and wire-drawing treatment can also eliminate minor defects on the metal surface.
G.Sand Blasting
Sand Blasting is a kind of technology that USES compressed air as the power to form a high-speed jet beam to spray the spray material to the surface of the workpiece to be processed at a high speed, so that the appearance or shape of the surface of the workpiece surface changes, to obtain a certain degree of cleanliness and different roughness. [TJC STEEL]
Technical features:
1, to achieve different reflective or matt.
2. It can clean the tiny burrs on the surface of the workpiece, and make the surface of the workpiece more smooth, eliminate the harm of burrs, and improve the grade of the workpiece.
3, clear before the treatment of residual pollution, improve the finish of the workpiece, can make the workpiece show uniform metal color, make the appearance of the workpiece more beautiful, good-looking.
H. Polishing
The modification of the workpiece surface by using flexible polishing tools and abrasive particles or other polishing media.
For different polishing processes: rough polishing (basic polishing process), medium polishing (finishing process) and fine polishing (polishing process), the selection of the appropriate polishing wheel can achieve the best polishing effect, while improving the polishing efficiency.
Technical features:
Improve the precision of size or geometry of the workpiece, get smooth surface or mirror luster, but also can eliminate the luster. [TJC STEEL]
I.Etching
Commonly referred to as etching, also known as photochemical etching, refers to the exposure of plate making, development, the protection of the etching area to remove the film, in the etching contact with the chemical solution, to dissolve the corrosion effect, the formation of concave and convex or hollow molding effect.
Exposure method: [TJC STEEL]
The project according to the figure out prepared material size - material preparation - material cleaning - drying - film or coating - drying - exposure - development - drying - etching - film - OK
Screen printing method:
Open material → clean plate (stainless steel other metal materials)→ screen printing → etching → film removal →OK
Technical features: [TJC STEEL]
Advantages:
1. Fine machining of metal surface;
2. Endow the metal surface with special effects;
Disadvantages:
Most corrosive liquids used in etching (acid, alkali, etc.) are harmful to the environment.
J. PVD vacuum plating
Process flow:
Cleaning before PVD → vacuum into furnace → target washing and ion cleaning → coating → coating ends, cooling out → post-processing (polishing, AFP)
Technical Features: [TJC STEEL]
PVD (Physical Vapor Deposition, Physical Vapor Deposition) can be coated on the metal surface of high hard plating, high wear resistance cermet decorative coating
[email protected]
It is mainly the anodic oxidation of aluminum, which is the formation of an Al2O3 (alumina) film on the surface of aluminum and aluminum alloy using electrochemical principles.The oxide film has the special characteristics of protection, decoration, insulation and wear resistance.
Process Flow:
Monochrome, gradient: polishing/sandblasting/drawing → oil removal → anodic oxidation → neutralization → dyeing → sealing → drying
Double Color:
(1) Polishing/sandblasting/wire drawing → oil removal → shielding → anodizing 1→ anodizing 2 → sealing → drying [TJC STEEL]
Polishing/sandblasting/wire drawing → oil removal → anodizing 1 → radium carving → anodizing 2 → sealing → drying
Technical characteristics
1. Lifting Intensity;
2. Realize Any Color Except White;
3. Realize nickel-free hole sealing to meet the nickel-free requirements of Europe, the United States and other countries.
Technical difficulties and key points of improvement:
The yield level of anodic oxidation is related to the cost of the final product. The key to improve the oxidation yield is the appropriate amount of oxidant, the appropriate temperature and the current density, which requires the manufacturers of structural parts to continuously explore and seek breakthroughs in the production process. [TJC STEEL]
B. Electrophoresis
Used for stainless steel, aluminum alloy, etc., can make the product appear a variety of colors, and keep the metallic luster, at the same time enhance the surface performance, has a better anti-corrosion performance.
Process: pretreatment → electrophoresis → drying [TJC STEEL]
Technical Features:
Advantages:
1. Rich colors;
2, no metal texture, can cooperate with sand blasting, polishing, drawing, etc.;
3, the liquid environment processing, can achieve the surface treatment of complex structure;
4. Mature process and mass production.
Disadvantages:
The ability to conceal defects is general, and the need for pretreatment of die casting by electrophoresis is high. [TJC STEEL]
C. Micro-arc Oxidation (MAO)
Advantages:
1. Ceramic texture, dark and dumb appearance, no high-gloss products, delicate feel, anti-fingerprint;
2. Wide range of substrate: Al, Ti, Zn, Zr, Mg, Nb, and their alloys;
3. Simple pretreatment, excellent corrosion resistance, weather resistance and heat dissipation. [TJC STEEL]
Disadvantages:
At present, the color is limited, only black, gray and other mature, bright color is difficult to achieve;The cost is mainly affected by high power consumption, is one of the highest surface treatment costs.
D. Electroplating
Electroplating is the use of electrolysis to make the metal surface attached to a layer of metal film technology to prevent corrosion, improve wear resistance, electrical conductivity, reflective and enhance the role of beautiful technology.
Process flow:
Pretreatment → cyanide-free alkaline copper → cyanide-free copper tin → chrome plating
Technical features:
Advantages:
1, high gloss coating, high quality metal appearance;
2. The substrate is SUS, Al, Zn, Mg, etc.The cost is lower than PVD.
Disadvantages:
Environmental protection is poor, the risk of environmental pollution is greater.
E. Powder Coating [TJC STEEL]
Powder Coating is the use of powder spraying equipment (electrostatic spray molding machine) powder coating on the surface of the workpiece, in the electrostatic action, powder will be uniform adsorption on the surface of the workpiece, forming a powder coating;The powdery coating is baked at high temperature and then smoothed and cured to become the final coating with different effects (different kinds of effects of powder coatings).
Process flow:
Top → electrostatic dust removal → spraying → low temperature leveling → baking
Technical features:
Advantages:
1, rich color, highlight, matte optional; [TJC STEEL]
2. Low cost, suitable for building furniture products and radiator housing;
3, high utilization rate, 100% utilization, environmental protection;
4. Strong ability to cover defects;5, can copy the effect of wood grain.
F. Metal Drawing
Metal Drawing is a kind of surface treatment means that forms a line pattern on the surface of the workpiece by grinding the product and plays a decorative effect.According to the different lines after drawing can be divided into: straight drawing, random drawing, ripple, spiral. [TJC STEEL]
Technical features:
Wire-drawing treatment can make the metal surface obtain non-mirror-like metallic luster, and wire-drawing treatment can also eliminate minor defects on the metal surface.
G.Sand Blasting
Sand Blasting is a kind of technology that USES compressed air as the power to form a high-speed jet beam to spray the spray material to the surface of the workpiece to be processed at a high speed, so that the appearance or shape of the surface of the workpiece surface changes, to obtain a certain degree of cleanliness and different roughness. [TJC STEEL]
Technical features:
1, to achieve different reflective or matt.
2. It can clean the tiny burrs on the surface of the workpiece, and make the surface of the workpiece more smooth, eliminate the harm of burrs, and improve the grade of the workpiece.
3, clear before the treatment of residual pollution, improve the finish of the workpiece, can make the workpiece show uniform metal color, make the appearance of the workpiece more beautiful, good-looking.
H. Polishing
The modification of the workpiece surface by using flexible polishing tools and abrasive particles or other polishing media.
For different polishing processes: rough polishing (basic polishing process), medium polishing (finishing process) and fine polishing (polishing process), the selection of the appropriate polishing wheel can achieve the best polishing effect, while improving the polishing efficiency.
Technical features:
Improve the precision of size or geometry of the workpiece, get smooth surface or mirror luster, but also can eliminate the luster. [TJC STEEL]
I.Etching
Commonly referred to as etching, also known as photochemical etching, refers to the exposure of plate making, development, the protection of the etching area to remove the film, in the etching contact with the chemical solution, to dissolve the corrosion effect, the formation of concave and convex or hollow molding effect.
Exposure method: [TJC STEEL]
The project according to the figure out prepared material size - material preparation - material cleaning - drying - film or coating - drying - exposure - development - drying - etching - film - OK
Screen printing method:
Open material → clean plate (stainless steel other metal materials)→ screen printing → etching → film removal →OK
Technical features: [TJC STEEL]
Advantages:
1. Fine machining of metal surface;
2. Endow the metal surface with special effects;
Disadvantages:
Most corrosive liquids used in etching (acid, alkali, etc.) are harmful to the environment.
J. PVD vacuum plating
Process flow:
Cleaning before PVD → vacuum into furnace → target washing and ion cleaning → coating → coating ends, cooling out → post-processing (polishing, AFP)
Technical Features: [TJC STEEL]
PVD (Physical Vapor Deposition, Physical Vapor Deposition) can be coated on the metal surface of high hard plating, high wear resistance cermet decorative coating
[email protected]