Colored passivation is one of the most common passivation processes after galvanizing, giving excellent appearance and performance by forming a rainbow-colored passivation film on the surface of the galvanized layer.
Author: Anna
Colored passivation is one of the most common passivation processes after galvanizing, giving excellent appearance and performance by forming a rainbow-colored passivation film on the surface of the galvanized layer. The following are the main advantages of color passivation:
1. Excellent appearance
Iridescent effect: The iridescent passivation film is blue, yellow, red and other rainbow colors, which gives a bright and beautiful appearance.
Strong decorative: rainbow color appearance is suitable for products that require aesthetic appearance (such as architectural hardware, household appliances, automotive parts, etc.), to enhance the market attractiveness of the product.
2. Excellent corrosion resistance
High corrosion resistance: The thicker color passivation layer can significantly improve the corrosion resistance of galvanized parts and extend their service life.
Applicable environment: suitable for highly corrosive environment (e.g. outdoor, marine environment, etc.).
3. Good adhesion
Strong film adhesion: the color passivation film layer is firmly bonded to the galvanized layer and is not easy to come off.
Durability: good stability of the film layer, able to maintain the bright appearance and corrosion resistance for a long time.
4. Mature technology
Mature technology: color passivation process has been developed over the years, mature technology, simple operation.
Lower cost: passivation solution is relatively cheap, suitable for mass production.
5. Wide range of applications
Construction industry: used in steel structure, door and window fittings, guardrail, etc.
Home appliance industry: used for washing machine, refrigerator, air conditioner and other home appliance shell.
Automobile industry: used for automobile parts, fasteners, etc.
Hardware industry: used for bolts, nuts, washers, etc.
6. Environmental protection (chrome-free color passivation)
Chromium-free process: With the improvement of environmental protection requirements, chromium-free colored passivation process is gradually popularized, which reduces the harm to the environment and human body.
Compliance with environmental regulations: Chrome-free colored passivation meets the requirements of RoHS, REACH and other environmental regulations.
7. Enhance the added value of products
Aesthetics: The rainbow color appearance gives the product a high-end, fashionable feeling and enhances market competitiveness.
Customization: Color passivation can meet customers' individual needs for product appearance.
8. Process Flexibility
Multiple substrates: Colored passivation is not only suitable for galvanized parts, but also for other metal substrates (e.g. steel, aluminum alloys, etc.).
Controllable process: By adjusting the composition of the passivation solution and the process parameters, it is possible to obtain colored coatings with different shades and properties.
9. Functional applications
Heat resistance: The colored passivate layer remains stable in high temperature environments, making it suitable for high temperature applications.
Abrasion resistance: The colored passivation film layer has a certain degree of abrasion resistance, suitable for occasions requiring abrasion resistance.
The advantages of color passivation include excellent appearance, excellent corrosion resistance, good bonding, process maturity, wide range of applications, environmental friendliness (chrome-free process), increased product value, process flexibility and functional applications. These advantages have made colored passivation an important surface treatment process for meeting high corrosion resistance and aesthetic demands in a wide range of applications such as architectural, home appliance, automotive and hardware.