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LML Metal Products Ltd.No. D309, Yunchuang E Valley, No. 3 Huanshi West Road, Tangxia Town, Dongguan City, Guangdong,China
(86) 17833674102dlynn9527@gmail.com
Surface finishes
Polishing Services
The stainless steel polished service is a multi-stage process that gradually refines the metal's surface using progressively finer abrasives to achieve a smooth, mirror-like finish.
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Stainless Steel Polished Service
Stainless Steel Polished Service enhances the surface of metal components to achieve a smooth, reflective finish. This process not only improves aesthetic appeal but also increases corrosion resistance and makes the surface easier to clean and maintain.
Process Characteristics:
Mirror polishing aims to create an exceptionally smooth, reflective surface with a high-gloss, mirror-like appearance that clearly reflects images. It is achieved by progressively refining the surface to eliminate all visible scratches and imperfections.
The finish is characterized by its high reflectivity and brilliant luster. The final surface is non-porous, which enhances corrosion resistance and makes it easy to clean. The process requires significant skill and progressive steps to achieve a defect-free mirror effect.
The classic finish is a clear, bright silver (the natural metal color). For decorative purposes, a mirror-polished surface can serve as an excellent base for subsequent Physical Vapor Deposition (PVD) coating, allowing for colors like Gold, Rose Gold, Black, and Blue while retaining high reflectivity.
Key Consistency Requirements
- Provides a brilliant, reflective surface that enhances aesthetic value and perceived quality.
- Creates a smooth, non-porous surface that improves corrosion resistance and hygiene.
- Easier to clean and maintain due to the lack of surface texture that can trap dirt.
- Reflects light brightly, which can help with light distribution in some applications.
- Waste Treatment is easier than chromic anodize, which also helps to reduce cost.
Mirror Polishing Applications:
- Optical components
- High-end kitchen appliances and cookware
- Sanitary ware and bathroom fixtures
- Automotive trim and exhaust systems
- Decorative hardware and luxury goods
Process Characteristics:
Matte polishing creates a uniform, low-gloss surface that diffuses light, minimizing reflections and glare. It focuses on achieving a specific, consistent texture rather than high reflectivity.
This finish is defined by its controlled, non-reflective texture. Common types include:
1. Brushed: Features fine, parallel or circular abrasive lines.
2.Satin: A finer, more uniform version of brushed, with a softer feel.
3.Bead Blasted: A matte, finely textured surface created by bombarding the surface with small media.
Key Consistency Requirements
- Effectively hides fingerprints, minor scratches, and surface imperfections.
- Provides a non-glare, visually subdued finish suitable for functional and aesthetic applications.
- Improve parts surface for slide applications
- Often offers better wear resistance compared to a pristine mirror finish.
- Creates a tactile, premium surface feel.
Matte Polishing Applications:
- Valves
- Consumer electronics and appliance housings
- Kitchen equipment and range hoods
- Architectural fittings and hardware
- Medical and food processing equipment
- Industrial machinery and enclosures
- Automotive interior trim
Color options for aluminum anodizing
The color of anodized finishes may exhibit some degree of variation due to standard alloy tolerance differences. Please refer to the color scheme below to observe the range of available colors.* We supply a range of standard colors (see Color options). If you need a particular RAL or Pantone color code, please contact sales@lmlmetal.com
Black (Black MLW)
Similar to: RAL 9004, Pantone Black 6
Clear
Similar to: depends on material
Red (Red ML)
Similar to: RAL 3031, Pantone 1805
Blue (Blue 2LW)
Similar to: RAL 5015, Pantone 3015
Orange (Orange RL)
Similar to: RAL 1037, Pantone 715
Gold (Gold 4N)
Similar to: RAL 1012, Pantone 612
All colored surface treatments (anodizing/powder spraying/painting, etc.) will have color difference, which is reflected in several aspects: 1. Different product sizes, even if the material is the same and the color is the same, there will be color difference, the aluminum box There will be color difference between the body and the cover 2. There will be color difference between different batches, because the oxidation time and coloring effect cannot be guaranteed to be exactly the same 3. If the same color is anodized without using different grades of the same material, there will be color difference 4. Different surface treatment types will have color difference, such as anodizing and powder spraying, if you choose the same Pantone color card number, there will also be color difference
Color options for aluminum anodizing
| Type | Impracticable situation | Features | Thickness（μm） | Application | Colors | PIC |
|---|---|---|---|---|---|---|
| Chromic acid (Type |) | a.Aluminum alloy parts with copper content > 5% b.Aluminum alloy parts with copper and silicon content > 7.5% | maintains the accuracy and surface roughness of original parts ,well bonding preformance | 3μm | a.1. Lap, riveted, welded or complex shaped parts b. Parts with high precision and low roughness | black,other color is imparctical |  |
| Sulfuric acid (Type II ) | Lap, spot weld or riveted part | the most common type of anodizing，can dye with a greater variety of colors | 0.5~20μm | The part that need brighten appearance or special color, as decoration or identification mark. | Black, Red, Blue, Green, Coyote Brown, Urban Grey, and Gold,allow for practically any hue | |
| Hard Anodize (Type 1I) | Parts with high fatigue performance requirements | superior abrasion performance and electrical insulation，HV＞420 | 30~120um | valves/hinges/cams/gear/insulation plates | black,other colors are less ornamental | |
| Organic acid (Type IC) | uneven and amorphous black regions develop. | Anodizing can produce yellowish integral colours without dyes if it is carried out in weak acids with high voltages, high current densities, and strong refrigeration. | upto50um | Integral colour anodizing | pale yellow, gold, deep bronze, brown, grey, and black | |
Tolerance for all surface preparation are held after anodizing.
Gallery of anodized parts manufactured by LML
The color of anodized finishes may exhibit some degree of variation due to standard alloy tolerance differences. Please refer to the color scheme below to observe the range of available colors.* We supply a range of standard colors (see Color options). If you need a particular RAL or Pantone color code, please contact sales@lmlmetal.com
Knurling
chamfering
Grinding
Heat Treatment
welding
riveting
Example of a bead blasted part
Aluminum Anodizing Process By Lml
The aluminum anodizing process involves sequential steps for improving surface properties and appearance.
- * Degreasing: Aluminum is cleaned to remove dirt and contaminants.
- * Rinse: Cleaned aluminum is rinsed to eliminate residual agents.
- * Polishing: Chemical or electrochemical polishing smoothens imperfections.
- * Anodizing: Aluminum is immersed with a cathode in an electrolytic solution. Electric current
causes controlled oxidation, forming a substantial aluminum oxide layer.
- * Activation: The surface is activated for effective dye absorption.
- * Dyeing: Pigments or dyes enter aluminum oxide pores, adding color options.
- * Sealing: Immersion in a sealing solution closes pores, enhancing durability and corrosion resistance.
Design Considerations for Aluminum Anodizing:
* Fixture Placement: During anodizing, components are suspended using a "jig" or "rack," which can result in marks where anodizing is not feasible. To prevent this, identify critical areas on your part where such marks are unacceptable.
* Electrical Insulation: Anodizing creates an insulating layer on your parts, impacting their conductivity. Factor in this change when designing components that require specific electrical properties.
* Masking Evaluation: Anodizing typically doesn't significantly alter the thickness of your part. So masking is usually unnecessary. However, if you wish to protect certain areas from anodization, clearly indicate these regions in your CAD file.
* Type III Anodizing: For Type III anodizing, which involves a thicker coating, consider masking or plugging threaded holes, reamed holes, and surfaces critical to your component's functionality. This precaution ensures that the added thickness doesn't interfere with the intended fit and function.
* Heat Dissipation: Anodizing affects thermal conductivity. Evaluate whether anodized surfaces might impact the component's heat dissipation properties.
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FAQs
LML takes the stress out of manufacturing by guaranteeing the quality and consistency of every part. Each order is dimensionally and visually inspected by our in-house quality control team to make sure it meets the LML Standard. If you’re not satisfied with your order, we’ll remake your parts as fast as possible, free of charge, or refund you - whichever you prefer.
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LML Metal Products Ltd.No. D309, Yunchuang E Valley, No. 3 Huanshi West Road, Tangxia Town, Dongguan City, Guangdong,China
(86) 17833674102dlynn9527@gmail.com
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