Surface treatment of spring after forming
Powder coating | |
 | Powder coating can provide the coating with long-lasting properties, including: abrasion resistance, impact resistance, adhesion, toughness, corrosion resistance and chemical resistance. In addition to the above advantages, powder coatings for outdoor use also have high weather resistance and pollution resistance. Powder coating can achieve a coating thickness of 50 to 300 μm in one spraying, and there is no dripping or stagnation when thick coating of dosage form coating occurs. To enhance the versatility of powder coatings, color, gloss and surface flatness can be adjusted according to customer preferences. |
Electrolysis | |
| Using a phosphoric acid-sulfuric acid-chromic acid solution, it is possible to remove burrs and debris, smooth the metal surface, and bring out the unique luster of the wire. Precision springs, springs with complex shapes, etc. will not deform at all. Because the surface impurities can be dissolved and removed to greatly improve the smoothness, it is often used in kitchen machines, building hardware, pipelines, home appliance parts, etc., and is used in a wide range of applications. ●High cleanliness: remove oxides from the surface of stainless steel to obtain a smooth and clean surface. ● Deburring: Suitable for precision components and areas that are difficult to reach by mechanical processing. ●Precision machining: can accurately correct the workpiece size and reduce surface roughness. |
Hot dip galvanizing | |
| Hot-dip galvanizing is widely used in highway, railway, electric power, shipbuilding, civil engineering, construction, agriculture, aquaculture and other projects. ●【A】Excellent corrosion resistance: The dense protective film and electrochemical sacrificial corrosion protection form an excellent corrosion protection layer to protect steel. ●【B】Most economical: ● Long-term anti-corrosion effect, no maintenance required, making it the most economical long-term anti-corrosion method. ●【C】Excellent adhesion: ● Iron and zinc react to form an alloy, which is strongly adhered, resistant to impact and friction and not easy to peel off. There are many ways to use surface metal plating technology, including zinc, aluminum, tin, lead and alloys, but zinc is the most commonly used for the purpose of corrosion protection of steel. |
Black | |
| Generally, black dyeing (black oxidation) treatment of steel can effectively improve corrosion resistance, but the protective effect is still quite limited. Oil immersion or subsequent anti-rust treatment is still required to truly improve the corrosion resistance and lubricity of the black dyeing layer. |
Paint | |
| It is rust-proof and beautiful, and is available in a variety of colors. |
Electrodeposition coating | |
Electrodeposition coating is a special coating method, that is, the electrodeposition coating is dispersed in water and precipitated on the coated object when electricity is applied, forming a uniform non-water-soluble coating film with excellent corrosion resistance. It is often used in automobile bodies and parts. | |
Phosphate film | |
| ● Phosphate film is attached to the spring surface, which can improve the rust resistance and electrical insulation, and enhance the oil adsorption. Phosphate is a nickel-containing heavy zinc phosphate used in iron and steel. Phosphates produce coating weights in excess of 2000 mg/ft2. Under atmospheric conditions, the surface state tends to be stable and has excellent corrosion resistance and electrical insulation. In addition, as long as it is sealed, its corrosion resistance can be greatly improved, and the phosphate film's inresistance to acid, alkali, ammonia, seawater and water vapor can be improved. |
Various electroplating | |
| Coat an object with a film. Since the electroplated surface has both protective and decorative effects, it is widely used. A small number of electroplatings provide other properties, such as high conductivity, high light reflectivity, or reduced toxicity. The most commonly used electroplated metals are nickel, chromium, zinc, tin, copper, silver, and gold. ● 1. Decorative ● 2. Mechanical properties (friction reduction, hardening) ● 3. Electrical properties (increase conductivity) ● 4. Optical properties (reflection or absorption) ● 5. Physical properties (increase welding, bonding, and interface bonding properties)
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