Surface treatment process for anodizing aluminum products
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of anodizing and surface treatment, applied in the direction of anodizing, can solve the problems of large porosity, poor mechanical properties, can not effectively prevent corrosion, etc., to achieve the effect of improving mechanical strength
Inactive Publication Date: 2012-05-30
张家港市华杨金属制品有限公司
View PDF5 Cites 8 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0003] It is well known that aluminum products will be oxidized in the air. The natural oxidation on the surface of aluminum is amorphous, which will make the surface of aluminum metal lose its original luster, although this layer of natural oxide film will slightly passivate the metal. , but it is very thin, about 4-5nm, and has a large porosity and poor mechanical properties, which cannot effectively prevent further corrosion of aluminum metal by various media in the atmosphere
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0015] Surface pretreatment: neutralization, water cleaning;
[0016] Anodizing treatment: degreasing treatment of aluminum products through acid-base solution at room temperature; then washing in hot pure water at 55°C; placing aluminum products as anodes in electrolytic sulfuric acid solution, at 35A, 58°C, pH value Perform yin and yang electrolysis within the condition range of 1.7; wash with pure water and hot water at 56°C; then dry and collect;
[0017] Package.
Embodiment 2
[0019] Surface pretreatment: neutralization, water cleaning;
[0020] Anodizing treatment: degreasing treatment of aluminum products through acid-base solution at room temperature; then washing in hot pure water at 65°C; placing aluminum products as anodes in electrolytic sulfuric acid solution, at 30A, 56°C, pH value Perform yin and yang electrolysis within the condition range of 1.5; wash with pure water and hot water at 60°C; then dry and collect;
[0021] Package.
Embodiment 3
[0023] Surface pretreatment: neutralization, water cleaning;
[0024] Anodizing treatment: degreasing treatment of aluminum products by acid-base solution at room temperature; then washing in hot pure water at 60°C; placing aluminum products as anodes in electrolytic sulfuric acid solution, at 25A, 60°C, pH value 2. Carry out electrolysis of yin and yang within the condition range of 2; wash with pure water, and wash with hot water at 55°C; then dry and collect;
[0025] Package.
[0026] No matter what method is used to process aluminum materials and products, there will be dirt and defects on the surface to varying degrees, such as dust, metal oxides, natural aluminum oxide films or aluminum oxide films formed at high temperatures, residual oil stains, asphalt marks, and manual handling. Fatty acids and helium-containing compounds, welding fluxes, and corrosion salts are insoluble in cold or hot water washing, but they can be dissolved in acidic solutions, so products that ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention provides surface treatment process for anodizing aluminum products. The surface treatment process includes steps of neutralizing and washing by water; degreasing the aluminum products by acid-base solution at the normal temperature; washing the aluminum products by hot pure water with the temperature ranging from 55 DEG C to 65 DEG C; disposing the aluminum products serving as anodes into electrolytic sulfuric acid solution so that anode and cathode electrolysis is carried out under the conditions of the current ranging from 25A to 35A, the temperature ranging from 55 DEG C to 60 DEG C and the pH (potential of hydrogen) value ranging from 1 to 2; then washing the aluminum products by hot water with the temperature ranging from 55 DEG C to 60 DEG C after washing the same by pure water; and finally drying the aluminum products and collecting the same. Accordingly, a dense film much thicker than a natural oxidation film can be formed on the surface of aluminum and alloy thereof after anodizing treatment, the thickness of the dense film ranges from tens of micrometers to hundreds of micrometers, accordingly, the surface luster of metal can be kept for a long time, both corrosion resistance and mechanical strength of the metal are improved to a certain degree, and decorative appearance of the aluminum products further can be formed by dyeing.
Description
technical field [0001] The invention relates to a surface treatment process, in particular to an aluminum product anodic oxidation surface treatment process. Background technique [0002] No matter what method is used to process aluminum materials and products, there will be dirt and defects on the surface to varying degrees, such as dust, metal oxides (alumina film formed naturally or at high temperature), residual oil stains, asphalt marks, manual handling fingerprints (The main components are fatty acids and helium-containing compounds), welding fluxes and corrosion salts, metal burrs, minor flower scratches, etc. Therefore, before the oxidation treatment, chemical and physical methods are used to clean the surface of the product necessary to expose the pure metal substrate, so as to facilitate the smooth progress of oxidation and coloring, so as to obtain a firm bond with the substrate, meet the requirements of color and thickness, and have Artificial membrane with good...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more