Aluminum Alloy Surface Processing for Fine Matte Ceramic Texture
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Solution Overview
Problem
Current surface treatment technologies for aluminum alloy surfaces in portable electronic products face challenges such as environmental hazards, high costs, complexity, and difficulty in achieving large-area processing with complex structures, while also limiting color options and durability.
Innovation Solution
A method involving chemical polishing, electrolytic treatment, and specialized anodizing processes to create a fine matte texture and ceramic-like appearance, allowing for adjustable colors and reliable large-area processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-voltage micro-arc treatment is used to produce ceramic texture on aluminum alloy surface, then ceramic appearance is achieved, but operation cost increases and process complexity increases
Solution Approach 1:
The patent changes the voltage parameter from high-voltage micro-arc treatment to low-voltage electrolytic treatment (0-50V range), fundamentally altering the process mechanism from arc discharge to electrochemical reaction. This parameter change eliminates the need for complex high-voltage power supply equipment while achieving similar ceramic texture effects through controlled electrolysis and anodizing processes.
Solution Approach 2:
The patent replaces the mechanical/electrical high-voltage micro-arc system with a chemical-electrolytic system. Instead of using high-voltage arc discharge to create ceramic texture, the invention uses electrolytic treatment followed by anodizing, substituting a simpler electrochemical process for the complex high-voltage electrical process.
2Reliability
If high-voltage micro-arc treatment is used to produce ceramic texture on aluminum alloy surface, then ceramic appearance is achieved, but operation cost increases
Solution Approach 1:
By changing the voltage parameter from high-voltage to low-voltage operation and switching from micro-arc to electrolytic-anodizing process, the patent significantly reduces energy consumption and equipment investment. The electrolytic treatment uses 0-50V with current density of 0.1-2.5 A/dm², followed by anodizing at similar parameters, which is much more cost-effective than high-voltage micro-arc treatment while maintaining ceramic texture quality.
3Device complexity
If conventional anodizing is used for surface treatment, then simple process is achieved, but color options are limited and ceramic texture is not obtained
Solution Approach 1:
The patent introduces a preliminary electrolytic treatment step before conventional anodizing. This preliminary action creates a specific surface state and pore structure that enables subsequent anodizing to produce ceramic texture and allows for diverse color options through dyeing, while maintaining overall process simplicity by using standard equipment and procedures.
4Reliability
If chromic acid oxidation is used to form ceramic film, then ceramic appearance is achieved, but environmental harm increases and color options are limited
Solution Approach 1:
The patent extracts and removes the harmful chromic acid component from the oxidation process. Instead of using chromic acid-based oxidation solutions that cause environmental pollution and limit color options, the invention employs electrolytic treatment followed by anodizing in environmentally friendly solutions, eliminating toxic substances while achieving superior ceramic texture and color versatility.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method produces a unique white ceramic texture with adjustable color, suitable for large-area processing of complex structures, meeting product specifications with high reliability and durability.
Implementation Method 1
performing an electrolytic treatment on the chemically polished aluminum alloy surface
Implementation Method 2
performing a first anodizing treatment on the aluminum alloy surface that undergoes the electrolytic treatment
Data Source
AI summary
A processing method for forming an aluminum alloy surface having a fine texture and a matte appearance includes: chemically polishing an aluminum alloy surface to have a 60-degree gloss between 10 GU and 1,000 GU; performing an electrolytic treatment on the chemically polished aluminum alloy surface; and performing an anodizing treatment on the aluminum alloy surface that undergoes the electrolytic treatment. The electrolytic treatment is operated at a current density between 0.01 A/dm2 and 1.5 A/dm2 and a gradually increasing voltage from 0 V to 50 V for 3 minutes to 30 minutes. The anodizing treatment is operated at a current density between 0.1 A/dm2 and 2.5 A/dm2 and a voltage between 10 V and 20 V for 30 minutes to 120 minutes.